a variable needs to be eliminated to solve the system of equations below.
x-7y= -45 -x+8y=51

Answers

Answer 1

Eliminate x by adding the two equations, yielding [tex]y = 6[/tex]. Then, substitute y into either equation to solve for x, obtaining [tex]x = -3[/tex]. The solution is [tex](-3,6)[/tex].

What is equation?

An equation is a mathematical statement that uses symbols, numbers, and variables to show that two expressions are equal, typically with an equal sign between them.

A variable is a quantity or symbol that can take on different values in a mathematical expression, equation, or formula, typically represented by a letter.

To eliminate a variable in a system of equations, we want to find a way to add or subtract the two equations so that one of the variables is eliminated.

In this case, we can eliminate the variable x by adding the two equations

[tex]x- 7y = -45[/tex]

[tex](-x +8y = 51)[/tex]

[tex]y = 6[/tex]

Now that we have found the value of y, we can substitute it into either of the original equations to solve for x. Let's use the first equation

[tex]x-7y = -45\\x- 7(6) = -45\\x = -45+42\\x = -3[/tex]

Therefore the solution to the system of equations is [tex]x= -3[/tex] and[tex]y= 6[/tex]

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Answer 2

the solution to the system of equations is (x, y) = (-3, 6).

What is an Equations?

Equations are mathematical statements with two algebraic expressions on either side of an equals (=) sign. It illustrates the equality between the expressions written on the left and right sides. To determine the value of a variable representing an unknown quantity, equations can be solved. A statement is not an equation if there is no "equal to" symbol in it. It will be regarded as an expression.

To eliminate the variable x, we can add the two equations together. This will result in the x variable being eliminated, leaving us with an equation in terms of y:

(x - 7y) + (-x + 8y) = -45 + 51

Simplifying and solving for y, we get:

y = 6

Now that we know the value of y, we can substitute it into one of the original equations to solve for x. Using the first equation:

x - 7(6) = -45

Simplifying and solving for x, we get:

x = -3

Therefore, the solution to the system of equations is (x, y) = (-3, 6).

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Related Questions

I need some help pretty please

Answers

Answer:

y - 2 = 2(x + 3)

Step-by-step explanation:

the equation of a line in point- slope form is

y = b = m(x - a)

where m is the slope and (a, b ) a point on the line

calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 3, 2 ) and (x₂, y₂ ) = (2, 12 )

m = [tex]\frac{12-2}{2-(-3)}[/tex] = [tex]\frac{10}{2+3}[/tex] = [tex]\frac{10}{5}[/tex] = 2

using (a, b ) = (- 3, 2 ) , then

y - 2 = 2(x - (- 3) ) , that is

y - 2 = 2(x + 3)

Use the diagram to find the measure of KM.

.

Answers

Therefore, the measure of arc KM is 160 degrees.

What is arc?

In geometry, an arc is a portion of the circumference of a circle or any other curved shape. It is defined by two endpoints and all the points on the curve between those endpoints. The measure of an arc is typically given in degrees, and it is equal to the measure of the central angle that subtends the arc.

Here,

Since P is the center of the circle, we know that arc KM is twice the measure of angle KPM. Therefore, we need to find angle KPM first.

We know that angle KPL is 100 degrees, so angle KPM is the supplement of angle KPL, which is:

180 degrees - 100 degrees = 80 degrees

Similarly, we know that angle NPM is 120 degrees, so angle NPL is the supplement of angle NPM, which is:

180 degrees - 120 degrees = 60 degrees

Since angle KPL and angle NPL are vertical angles, they are congruent. Therefore, angle KPL has a measure of 60 degrees.

Now we can find the measure of arc KM:

arc KM = 2 * angle KPM

= 2 * 80 degrees

= 160 degrees

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Find the surface area of the pyramid.
PLEASE HELP I HAVE TO SUBMIT THIS SOON AND I CANT FIGURE IT OUT

Answers

The surface area of the pyramid is approximately 721.04 square feet.

Describe Area?

Area is a measure of the size of a two-dimensional region or surface, such as a rectangle, triangle, circle, or any other shape. It is the amount of space inside the boundaries of a closed figure, expressed in square units. The unit of measurement used for area depends on the context and the system of measurement being used, but some common units include square meters, square centimeters, square feet, and square inches.

To calculate the area of a regular shape, such as a square or rectangle, you can multiply the length of the base by the height or width of the shape. For more complex shapes, such as triangles or circles, different formulas can be used depending on the properties of the shape. Area is an important concept in geometry, as well as in many other areas of mathematics, science, engineering, and everyday life.

To find the surface area of the pyramid, we need to find the area of each face and add them up.

Since the base of the pyramid is a square, and the length of each side is 13 ft, the area of the base is:

Area of base = (13 ft) x (13 ft) = 169 sq ft

To find the area of each triangular face, we first need to find the slant height of the pyramid. The slant height is the distance from the apex of the pyramid to the midpoint of one of the sides of the base. We can use the Pythagorean theorem to find the slant height:

Slant height = √( (1/2 x 13 ft)² + 18 ft² )

= √( 169 ft² + 324 ft² )

= √493

≈ 22.18 ft

Now we can find the area of each triangular face using the formula:

Area of triangle = (1/2) x base x height

where the base is one of the sides of the square base, and the height is the slant height we just found. Therefore, the area of each triangular face is:

Area of triangle = (1/2) x 13 ft x 22.18 ft

≈ 143.01 sq f

Since there are four triangular faces, the total surface area of the pyramid is:

Total surface area = 4 x Area of triangle + Area of base

= 4 x 143.01 sq ft + 169 sq ft

≈ 721.04 sq ft

Therefore, the surface area of the pyramid is approximately 721.04 square feet.

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sorry to bother but can yall help me with this?

Answers

17, 19 and 20 are modes

Mode is the value that appears the most and in this question 17 19 and 20 all appear 3 times which is max so they’re the modes

Select the correct answer.
What is the range of the function graphed below?

A. -∞ B.-2 C. -∞ D.-∞

Answers

The range of the function graphed above include the following: D. -∞ ≤ y ≤ 2.

What is a range?

In Mathematics and Geometry, a range can be defined as the set of all real numbers that connects with the elements of a domain.

Additionally, the vertical extent of any graph of a function represents all range values and they are always read and written from smaller to larger numerical values, and from the bottom of the graph to the top.

By critically observing the graph shown in the image attached above, we can reasonably and logically deduce the following range and domain:

Range = {-∞, 2} or -∞ ≤ y ≤ 2.

Domain = {-1, ∞} or -1 < x < ∞.

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You have 8 donuts to share evenly between you and your four brothers.
Which fraction describes how many donuts each of you will receive?

Answers

1/2 , it’s a simple ad 8 divided by 2 & turning that into a fraction.

12. Look for Relationships In the graph of a
vertical motion model shown, how is the initial
velocity related to the vertex of the parabola?

Answers

The vertical component of the initial velocity will basically decide where the vertices will be. that is how the initial velocity is related to the vertex of the parabola.

Describe Parabola?

A parabola is a symmetrical curve that is formed by the intersection of a plane and a cone, where the plane is parallel to one of the cone's generating lines. The shape of a parabola is similar to that of a U-shaped curve, but with a sharper curve near the bottom of the U.

The parabola has several important properties, including a focus and a directrix. The focus is a point on the axis of symmetry of the parabola that is equidistant from every point on the curve. The directrix is a line that is perpendicular to the axis of symmetry and is equidistant from every point on the curve.

The equation of a parabola in standard form is y = ax² + bx + c, where "a" determines the direction and shape of the parabola, "b" determines the horizontal shift of the parabola, and "c" determines the vertical shift of the parabola.

The initial velocity will have two component basically, a horizontal component and a vertical component. The vertical component will decide how high the object will go, or in other words the vertical component of the velocity will decide the position of the vertex of the parabolis path which the object is going to follow.

When the vertical component of the velocity becomes 0, the object will be at it's maximum height (i.e the object will be at the vertex of the parabola)

The vertical component of the initial velocity will basically decide where the verties will be. that is how the initial velocity is related to the vertex of the parabola.

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please answer and explain

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Zip line B's total length requires 301 feet of cable using the distance between trees and change in height.

How to calculate length?

To determine the length of cable needed, we need to calculate the horizontal and vertical distances between the trees, and then apply the constraints.

Let's start by labeling the trees and their distances:

Tree 1: 120 ft from Tree 2, 150 ft from Tree 3

Tree 2: 140 ft from Tree 3

Zip line B is the longest, so calculate the length of cable needed for that option.

Horizontal distance: Tree 2 to Tree 3 is 140 ft.

Vertical distance: The starting platform needs to be 16 ft above the ground, and the harness hangs down 4 ft below the cable, plus an additional 3 ft for the rider's legs. So the total height difference is 16 + 4 + 3 = 23 ft.

Using the slope constraint, we want a vertical change of 6 to 8 feet for every 100 feet of horizontal change. For a horizontal distance of 140 ft, we want a vertical change of:

(6/100) x 140 = 8.4 ft

(8/100) x 140 = 11.2 ft

So the zip line needs to have a vertical drop of between 8.4 and 11.2 ft.

Using the slack constraint, we need to add 5% slack to the length of the cable:

140 ft x 1.05 = 147 ft

Adding 7 ft of extra cable at each end, the total length of cable needed is:

140 ft + 147 ft + 7 ft + 7 ft = 301 ft

Therefore, the total length of cable needed for Zip line B is 301 ft.

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Complete question:

Designing a Zip Line You and your friend Latisha work at the community center. You will be counselors at a summer camp for middle school students. The camp director has asked you and Latisha to design a zip line for students to ride while at camp. A zip line is a cable stretched between two points at different heights with an attached pulley and harness to carry a rider. Gravity moves the rider down the cable. The zip line will be secured to two trees. The camp has a level field with three suitable trees to choose from. All three trees are on level ground. • Tree 1 is 120 feet from Tree 2. • Tree 2 is 140 feet from Tree 3. • Tree 1 is 150 feet from Tree 3. Tree 2 Tree 3 Tree 1 120 ft 140 ft acer Tree 1 is 120 feet from Tree 2. • Tree 2 is 140 feet from Tree 3. Tree 1 is 150 feet from Tree 3. - Tree 2 Tree 3 Tree 1 120 ft 140 ft 150 ft There are three possible zip line locations: Zip line A between Tree 1 and Tree 2, Zip line B between Tree 2 and Tree 3, or Zip line C between Tree 1 and Tree 3. acer Tree 2 Tree 1 Tree 3 Zip line A Zip line 8 Zip linec A professional company will be hired to install the zip line. They will build platforms at the two trees used for starting and ending the zip line. The starting platform will require the cable to start at a height 16 feet above the ground You and Latisha researched how to build a zip line. There are four basic constraints for your design. • Slope Constraint: The slope of the zip line should be 6 to 8 feet of vertical change for every 100 feet of horizontal change. • Slack Constraint: The zip line should have a 5% slack in it. acer • Harness Constraint: The cable must be high enough that the rider, while buckled into the harnese dnes not touch the ground. • The harness hangs down 4 feet below the cable. • An additional 3 feet must be used to allow for a rider's legs to hang down below the harness. • Brake Constraint: A brake must be placed on the cable to ensure the rider does not hit the tree. A bungee cord connects the brake to an anchor in the ground. . The length of the bungee cord is 24 feet. • The bungee cord stretches to a maximum of 175% of its original length. Harness Constraint Brake Constraint Rider 4 ft Rider Brake 3 ft Harness Bungee cord Brake anchor acer Rider 4 ft Rider Brake 3 ft Harness Bungee cord Brake anchor Your task is to choose which zip line to build, Zip line A, Zip line B, or Zip line C, and to design this zip line within the given constraints. acer The camp director is ready to purchase the cable. Use the distance between the trees and the change in height of the cable to determine the length of cable needed. Be sure to include: • the required 5% slack in the line, and • 7 extra feet of cable at each end to wrap around each tree. Enter the total length, in feet, of cable needed.

The temperature rose 5 degrees from 6:00am to 12:00pm.

Answers

The average rate of change per hour in the temperature is 0.83 degrees.

What is the average rate of change per hour

To find the average rate of change per hour, we need to divide the total change in temperature by the number of hours over which the temperature changed.

The temperature rose by 5 degrees from 6:00 am to 12:00 pm, which is a period of 6 hours.

Therefore, the average rate of change per hour can be calculated as follows:

average rate of change per hour = total change in temperature / number of hours

So, we have

average rate of change per hour = 5 degrees / 6 hours

average rate of change per hour = 0.83 degrees/hour (rounded to two decimal places)

So, the average rate of change per hour is 0.83 degrees.

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pls hlp thx so much !!!!!!!!!!!!!!

Answers

On solving the provided question, we can say that

the measurement of angle B is 40 degrees.

What is equation?

A mathematical equation is a formula that connects two statements and denotes equivalence with the equals symbol (=). An equation is a mathematical statement that shows the equality of two mathematical expressions in algebra. In the equation 3x + 5 = 14, for example, the equal sign separates the variables 3x + 5 and 14.

A mathematical formula describes the connection between the two sentences that occur on opposite sides of a letter. The symbol and the single variable are frequently the same. As in 2x - 4 equals 2, for instance.

Supplementary angles add up to 180 degrees. Therefore, we can write the equation:

A + B = 180

Substituting the given expressions for A and B, we get:

(4x - 16) + (x + 1) = 180

Simplifying the left side, we get:

5x - 15 = 180

Adding 15 to both sides, we get:

5x = 195

Dividing both sides by 5, we get:

x = 39

Therefore, the measurement of angle B is:

B = x + 1 = 39 + 1 = 40 degrees.

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True/False: an analysis of variance (anova) can be used to determine differences in test scores of more than two groups.

Answers

Analysis of variance can be used to determine differences in test scores of more than two groups. It is true.

What is variance?

Apart from the measurement of statistics range and interquartile range, variance is a measure of dispersion that takes into account the spread of all data points in a data set. It is the measure of dispersion which has the most often utility, along with the standard deviation, which is nothing but the square root of the variance.

An analysis of variance (ANOVA) is called an analysis tool in statistics which separates an observed aggregate  variability which is found inside a two part data set.

As ANOVA is the extension of of t-tests and z-tests so a one way ANOVA can be used for three or more groups of data  in the purpose to gain information about the relationship in between dependent and independent variable.

So ANOVA can be used to determine differences in test scores of more than two groups.

Hence, the statement is true.

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In a probability experiment, Karen flipped a coin 51 times. The coin landed on heads 31 times. What percentage of the coin flips resulted in tails? Round to the nearest percent.





PLSSSSSSSSSSSSS HELP 50 PTSSSSSSSSSS I WILL GIVE YOU BRAINLYIEST

Answers

Approximately 39% of coin tosses resulted in tails

What is probability in math and example?

Probability is the likelihood or possibility of an event. For example, the probability of tossing a coin  is ½ because there is 1 way to get heads and the total number of possible outcomes is 2 (heads or tails).

Since the coin landed  heads 31 times in 51 tosses, it must be 51 - 31 = 20 times.

We can use the following formula to figure out the percentage of conversions that result in leads.

percentage of tails = (number of tails / total number of spins) x 100

Let's paste the values ​​we have:

percentage of heads = (20/51) x 100

percentage of heads = 0.39215686274 x 100

percentage of tails = 39.215686274

Rounding to the nearest percentage, we get:  tail rate ≈ 39%  

Thus, approximately 39% of  coin tosses resulted in tails

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what is the image of
(0,3) after a dilation by a scale factor of

2 centered at the origin? PLEASE HURRY ITS DUE TODAY :((

Answers

The image of the point (0, 3) after dilation by a scale factor of 2 centered at the origin is (0, 6).

What is the image of (0,3) after a dilation by a scale factor of 2 centered at the origin?

Dilation is a transformation in which a figure is enlarged or reduced by a scale factor.

We are to find the image of (0,3) after a dilation by a scale factor of 2 centered at the origin.

The scale factor is 2, which means the figure will be enlarged.

To find the image of (0, 3) after dilation, we multiply its x-coordinate and y-coordinate by 2.

Hence;

(0, 3)

Multiply the coordinates by 2.

(0 × 2, 3 × 2)

= (0, 6)

Therefore, the image after dilation is (0, 6).

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barron's reported that the average number of weeks an individual is unemployed is 18.5 weeks. assume that for the population of all unemployed individuals the population mean length of unemployment is 18.5 weeks and that the population standard deviation is 4 weeks. suppose you would like to select a sample of 40 unemployed individuals for a follow-up study. what is the probability that a simple random sample of 40 unemployed individuals will provide a sample mean within 1 week of the population mean? (round your answer to four decimal places.)

Answers

The probability that a sample mean of 40 unemployed individuals will be within 1 week of the population mean of 18.5 weeks with a population standard deviation of 4 weeks is 0.6827, rounded to four decimal places.

Given that the population mean length of unemployment is 18.5 weeks and the population standard deviation is 4 weeks, we want to find the probability that a simple random sample of 40 unemployed individuals will provide a sample mean within 1 week of the population mean.

The standard error of the sample mean is given by the formula

standard error = population standard deviation / sqrt(sample size) = 4 / sqrt(40) = 0.6325

Using the central limit theorem, we can assume that the sample mean follows a normal distribution with a mean of 18.5 weeks and a standard deviation of 0.6325 weeks.

To find the probability that the sample mean will be within 1 week of the population mean, we need to calculate the z-score for the lower and upper limits of the sample mean

z1 = (18.5 - 1 - 18.5) / 0.6325 = -1

z2 = (18.5 + 1 - 18.5) / 0.6325 = 1

Using calculator, we can find that the area between z = -1 and z = 1 is 0.6827.

Therefore, the probability that a simple random sample of 40 unemployed individuals will provide a sample mean within 1 week of the population mean is 0.6827 or 68.27% (rounded to four decimal places).

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Mallick Corp. reported the following information for 2013 and 2014.Accounts receivable, December 31, 2013 $ 67,000Accounts receivable, December 31, 2014 63,000Sales (all on credit) -- 2014 745,000How much cash was collected from customers during 2014?A. $741,000B. $745,000C. $749,000D. $753,000

Answers

The cash collection from customers which adds the change in accounts receivable to the sales for the year 2014 is $749,000. Option C is the correct answer.

To determine the cash collected from customers during 2014, we need to find out the change in accounts receivable from the beginning to the end of the year.

The change in accounts receivable is calculated as follows:

Change in accounts receivable = Accounts receivable, December 31, 2014 - Accounts receivable, December 31, 2013

= $63,000 - $67,000

= -$4,000

The negative sign indicates a decrease in accounts receivable, meaning that cash was collected from customers.

Now, to find the cash collected from customers, we need to add the change in accounts receivable to the sales for the year:

Cash collected from customers = Sales - Change in accounts receivable

= $745,000 - (-$4,000)

= $749,000

Therefore, the answer is C. $749,000.

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The question is -

Mallick Corp. reported the following information for 2013 and 2014.

Accounts receivable, December 31, 2013, $ 67,000

Accounts receivable, December 31, 2014, 63,000

Sales (all on credit) -- 2014 745,000

How much cash was collected from customers in 2014?

A. $741,000

B. $745,000

C. $749,000

D. $753,000

A parabola opening up or down has vertex (0,-6) and passes through (-6,3). Write its equation in vertex form.

Answers

The equation of the parabola in vertex form is y = (1/4)x² - 6.

What is the equation of the parabola?

To write the equation of the parabola in vertex form, we use the formula:

y = a(x-h)² + k

Where (h,k) is the vertex and "a" is a constant that determines the shape of the parabola.

Given that;

The vertex is (0,-6)

Hence:

h = 0 and k = -6.

We can substitute these values into the formula to get:

y = a(x-h)² + k

y = a(x - 0)² - 6

y = ax² - 6

Now we need to find the value of "a". We are also given that the parabola passes through the point (-6,3).

x = -6 and y = 3

We can substitute this point into the equation to get:

y = a(x - h)² + k

3 = a( - 6)² - 6

3 = 36a - 6

9 = 36a

a = 1/4

Now we know the value of "a", we can substitute it back into the equation we derived earlier:

y = ax² - 6

y = (1/4)x² - 6

Therefore, the equation in vertex form is y = y = (1/4)x² - 6.

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a quality control inspector wants to test whether the average weight of product on the line has varied from the specified value of 16 ounces. he takes a simple random sample of 100 products and obtains a mean of 16.3 and a standard deviation of 2.5. what are the hypotheses of this test?

Answers

Answer: The hypotheses of this test are:

Null hypothesis: The average weight of the product on the line is equal to the specified value of 16 ounces.

Alternative hypothesis: The average weight of the product on the line is different from the specified value of 16 ounces.

Step-by-step explanation:

17swtchPLEASE HELP ME THIS IS URGENT I WILL GIVE BRAINLIEST ALL FAKE ANSWERS WILL BE REPORTED AND PLS PLS PLS EXPLAIN THE ANSWER OR HOW U GOT IT PLEASE AND TY​

Answers

For given triangle,  Length of XY and YZ is equal to 7√2.

What is a triangle's definition?

A triangle has three straight sides and three angles. It is one of the basic shapes in geometry and has many properties and applications in mathematics and everyday life. The sum of the interior angles of a triangle is always 180 degrees, and there are different types of triangles depending on their side lengths and angle measures and it includes 6 types of triangles.

Now,

If one of the angles of a right triangle is 90 degrees and another angle is 45 degrees, then the third angle must also be 45 degrees. This means that the triangle is a 45-45-90 triangle, which has a special property that the two legs are congruent and the hypotenuse is the square root of 2 times the square length of each leg.

In this case, the hypotenuse is given as 14, so we can set up the following equation:

14 = √2x²

where x is the length of each leg of the triangle. To solve for x, we can square both sides of the equation:

14² = 2x²

196 = 2x²

x² = 98

x = 7√2

So, each leg of the triangle has a length of 7√2, and the hypotenuse has a length of 14.

Hence,

             Length of XY and YZ is equal to 7√2.

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At 2:48 what is the degree measure of the smaller angle formed by the hour and minute hands of a 12-hour clock? - Please help, I have 10 minutes

Answers

The degree measure of the smaller angle formed by the hour and minute hands of a 12-hour clock at 2:48 is 85 degrees.

The hour hand is between the 2 and the 3, and since it's 2:48, it's closer to the 3. To be more precise, it's at 2.8 on the clock face .

The minute hand is pointing at the 8, as it's 48 minutes past the hour.

To find the angle between the hands, we need to find the difference between their positions and multiply it by 30 .

So the angle formed by the hour and minute hands at 2:48 is:

| 30 × (2.8/12 - 8) | = | -85 | = 85 degrees.

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If the height is tripled, then which of the following statements about its volume will be true

Answers

Answer: 3:1

Step-by-step explanation:

the sides of a triangle have lengths 7.5, 11, and x. if x is an integer, what is the least possible value of x ? 1

Answers

In the given triangle the least possible value of x is 4.

What is triangle?

In Geometry, a triangle is a three-sided polygon which consists of three edges, three sides and three vertices. One of  the property of a triangle is that the sum of the internal angles of a triangle is equal to 180° or two right angle.

By the property of triangle the third side of the triangle should more than the difference of the other two sides and less than the sum of the another two sides.

The sides of a triangle have lengths 7.5, 11, and x.

So the inequality will be,

11- 7.5 < x < 7.5+11

3.5 < x < 18.5

As x is an integer and a integer number which is least with the criteria that it must be greater than 3.5 so it must be 4.

Hence, the value of x is 4.

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In 2010, the population of a city was 89,000. From 2010 to 2015, the population grew by 6.8%. From 2015 to 2020, it fell by 4.9%. To the nearest whole number, by what percent did the city grow from 2010 to 2020?

Answers

1.35% is the percentage change in the population of the city that grew from the years 2010 to 2020.

The population of the city = 89,000

Percentage in the growth of people from 2010 to 2015 = 6.8%

Percentage in the decline of people from  2015 to 2020 = 4.9%

The formula to calculate the percentage change is:

percentage change = (new value - old value) / old value x 100%

To calculate the population of the city after the growth of 6.8%

Population in 2015 = 89,000 x (1 + 6.8/100)

Population in 2015 = 95,012

To calculate the population of the city after the decline of 4.9%

Population in 2020 = 95,012 x (1 - 4.9/100)

Population in 2020 = 90,199.88

Population in 2020 = 90,200

The total change in the percentage of growth of population in the city is:

percentage change = (new population - old population) / old value * 100%

percentage change = (90,200 - 89,000) / 89,000 x 100%

percentage change = 1,200 / 89,000 x 100%

percentage change = 1.35%

Therefore, we can conclude that the population in the city grew by 1.35% from 2010 to 2020.

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Question 2(Multiple Choice Worth 2 points)
(Appropriate Measures MC)

The box plot represents the number of tickets sold for a school dance.

A horizontal line labeled Number of Tickets sold that starts at 8, with tick marks every one unit up to 30. The graph is titled Tickets Sold for A Dance. The box extends from 17 to 21 on the number line. A line in the box is at 19. The lines outside the box end at 10 and 27.

Which of the following is the appropriate measure of center for the data, and what is its value?

The mean is the best measure of center, and it equals 19.
The median is the best measure of center, and it equals 4.
The median is the best measure of center, and it equals 19.
The mean is the best measure of center, and it equals 4.

Answers

For the given problem, The correct answer will be option 3: The median is the best measure of center, and it equals 19.

What is a box plot?

A box plot,also known as a box-and-whisker plot, is used for graphical representation of summary statistics from a data set. It helps by providing a visual representation of a data set's central tendency, dispersion, and skewness, making it straightforward to identify important data aspects.

As box ranges from (17 to 21), the interquartile range (IQR) is [tex](21 - 17 = 4)[/tex].

The median is represented by the line inside the box, which is at 19. This shows that 50% of whole data is less than 19 and 50% of it is greater than 19.

Outside the box, the lines finish at 10 and 27, representing the lower and upper whiskers, respectively. Data range is represented by these lines, where lower whisker extends to a minimum of 10 and the higher whisker reaching to a maximum upto 27.

Since the median represents the middle value of the data when sorted in ascending order, and it is not influenced by outliers or extreme values, it is considered a robust measure of center. In this case, the median is 19, as it is the value at the center of the data according to the box plot.

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what type of data pattern or patterns do you see most prominently in the time series plot of marriages? select all that apply. group of answer choices seasonal horizontal/stationary trend downward trend upward

Answers

The specific patterns that are most prominent would depend on the data and the time period being analyzed.

The time series plot of marriages shows a clear seasonal pattern, with peaks occurring in the summer months and troughs in the winter months.

However, there does not seem to be a significant horizontal or stationary trend, as the overall level of marriages appears to fluctuate around a relatively stable mean. Additionally, there is no clear upward or downward trend over time, as the number of marriages appears to remain relatively stable despite some fluctuations. Overall, the most prominent pattern in the time series plot of marriages is the seasonal pattern, with little evidence of other types of patterns.

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Rita’s adding 3+ -8+1 Siri writes the expression is 3+-1+8 what is Rita’s error

Answers

Answer: 3+(-8+1) or 3+-8+1

Step-by-step explanation: Rita rewrote the equation so instead of it being negative 8 it is negative 1.

how many functions are there from the set {1, 2,...,n}, where n is a positive integer, to the set {0, 1} a) that are one-to-one? b) that assign 0 to both 1 and n? c) that assign 1 to exactly one of the positive integers less than n?

Answers

Answer: a) To count the number of one-to-one functions from the set {1, 2,...,n} to the set {0, 1}, we can use the formula for the number of permutations of n distinct objects, which is n!.

However, since we are only considering one-to-one functions, we can only choose 0 or 1 for the image of each element of the domain. The first element can be assigned 2 choices, the second can be assigned 1 of the remaining 2 choices, the third can be assigned 1 of the remaining 1 choice, and so on. Therefore, the number of one-to-one functions from {1, 2,...,n} to {0, 1} is:

2 × 1 × 1 × ... × 1 = 2^(n-1)

b) To count the number of functions that assign 0 to both 1 and n, we can treat the remaining elements {2, 3,...,n-1} as a new set and count the number of functions from this set to {0, 1}. This is the same problem as in part (a), but with n-2 elements instead of n. Therefore, the number of functions from {1, 2,...,n} to {0, 1} that assign 0 to both 1 and n is:

2^(n-3)

c) To count the number of functions that assign 1 to exactly one of the positive integers less than n, we can choose which element of the domain is assigned 1 in n ways. The remaining elements can be assigned 0 or 1 independently, for a total of 2^(n-1) choices. Therefore, the number of functions from {1, 2,...,n} to {0, 1} that assign 1 to exactly one of the positive integers less than n is:

n × 2^(n-1)

Step-by-step explanation:

Un concensario de coches rebaja a 16000 un vehiculo que valia 18300 en que porcentaje lo han rebajado?

Answers

As a car dealer lowers a vehicle that was worth 18300 to 16000 by applying the formula of change in percentage we get that by 12.569 percentage (approximately) the price gets lowered .

The initial price of the car is set at P = 18300 (units)

The price after lowering drom P becomes A= 16000 (units)

Hence the change in price (or value) of the car, that is the price of the car is lowered by, C = (initial price - lowered price) = (P - A) = (18300 - 16000) units = 2300 units.

The formula for calculating percentage change is given as follows,

Change in percentage = [(Change in value)/ ( Initial value) ]*100

⇒Change in percentage = (C/ P)*100

⇒ Change in percentage =( 2300/ 18300)*100 = 12.569% (approximately)

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the purse shown is a trapezoidal prism. the front face of the purse has a stripe. of the stripe is the midsegment of the front face, how long is the stripe

Answers

Answer:

(1/2)(7 + 12) = 19/2 = 9.5 inches

The requried measure of the middle strip of the trapezoidal prism is 9.5 inches.

What is simplification?

Simplification involves applying rules of arithmetic and algebra to remove unnecessary terms, factors, or operations from an expression. The goal is to obtain an expression that is easier to work with, manipulate, or solve.

Here,
The purse shown is a trapezoidal prism. the front face of the purse has a stripe.

The measure of the mid stripe is given by,
= 1 / 2[ sum of lower and upper strip]
= (1/2)(7 + 12)
= 19/2
= 9.5 inches

Thus, the requried measure of the middle strip of the trapezoidal prism is 9.5 inches.

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a cube has the same volume as a box that is 4ft 5.in long 3ft 2.in wide and 4ft 3.in deep. a. write an expression that models the length of one side of the cube. b. find the side length of the cube. c. does the cube or the box have a greater surface area? How much greater?

Answers

a. The length of one side of the cube  shape x ≈ 3.633 ft

b. The length of one side of the cube  shape is roughly 3.633 feet.

c. The case has a more noteworthy surface region than the block by roughly 10.325 square feet.

What is volume of the cube ?

Let x be the length of one side of the cube. Since the cube has equal length, width, and height, its volume is  = x^3.

The volume of the box  = (4 feet 5 in) * (3 feet 2 in) * (4 feet 3 in),

which can be converted to feet as Volume of box =

(4 + 5/12) * (3 + 2/12) * (4 + 3/12) = 4.3135 * 3.1667 * 4.25 =

55.0448 cubic feet.

Since the cube has the same volume as the box, we can set Volume of cube = Volume of box and

solve for x:

[tex]x^3 = 55.0448\\x = (55.0448)^{1/3}\\[/tex]

x ≈ 3.633 ft

b. The length of one side of the cube is approximately 3.633 feet.

c. We must determine the surface area of each to compare the cube's and box's surfaces. A cube with side length x has the surface area given by

Surface area of cube = [tex]6x^2[/tex], and

Surface area of a box = 2lw + 2lh + 2wh is the formula for the surface area of a box with the dimensions l, w, and h. Based on the box's dimensions, we have:

Surface area of cube = [tex]6(3.633)^2[/tex] ≈ 79.342 sq. feet

Surface area of box = 2(4.4167 * 3.25) + 2(4.4167 * 4.25) + 2(3.25 * 4.25) ≈ 89.667 sq. feet

By about 10.325 square feet, the surface area of the box is greater than that of the cube.

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Todd throws a ball from his tree house. The height in feet of the ball, h(t), above the ground after t seconds is modeled by the function h(t) = −3t2 + 9t + 12. Select the appropriate domain for the function.
A. 0 ≤ t ≤ 4
B. 0 ≤ t ≤ 12
C. t ≥ 0
D. 0 ≤ t ≤ 18.75

Answers

The solution of the given problem of function comes out to be Option C,  t ≥ 0, which is the proper domain for the specified function

Explain function.

Each subject will include a range of problems on the final exam covering both real and fictitious locations as well as the formation of numerical factors. a diagram illustrating the connections between various components that work together to produce the same outcome. A service is made up of several individual components that work together to produce unique outcomes for each input.

Here,

In order to represent the height of the ball above the ground after t seconds, the function

=>  h(t) = -3t² + 9t + 12

has the correct domain of C. t ≥ 0.

Reason: Since time (t) here refers to the duration in seconds since the ball was thrown, it cannot be negative.

Therefore, t values greater than or equal to 0 should be the only values allowed in the function's domain.

Option C,  t ≥ 0, is the proper domain for the specified function and accurately represents this limitation.

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