Find x and y out of these equations written below
7x+4y=12
x+2y=-4

The percent increase in the cost of the uniform from last year to this year is 25%.

To find the percent increase in the cost of the uniform from last year to this year, we need to calculate the difference between the two prices, divide it by the original price, and then multiply by 100 to express the result as a percentage.

The difference between this year's price and last year's price is:

$65 - $52 = $13

The original price (last year's price) is $52.

So the percent increase in the cost of the uniform is:

percent increase = (difference / original price) x 100

percent increase = ($13 / $52) x 100

percent increase = 0.25 x 100

percent increase = 25%

Therefore, the percent increase in the cost of the uniform from last year to this year is 25%.

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The radius of the cylindrical water bottle is approximately 2.34 cm.

The company designing the water bottle has given us the volume of the bottle, which is 220 cm³, and the height of the bottle, which is 8.9 cm. We can use the formula for the volume of a cylinder to relate the radius, height, and volume of the water bottle. The formula is:

Volume of a cylinder = π × radius² × height

We are given the volume of the cylinder as 220 cm³ and the height as 8.9 cm, so we can substitute these values into the formula to get:

220 = π × radius² × 8.9

To solve for the radius, we need to isolate it on one side of the equation. We can start by dividing both sides by π × 8.9:

220 ÷ (π × 8.9) = radius²

Now, we can take the square root of both sides to find the value of the radius:

√(220 ÷ (π × 8.9)) = radius

Using 3.14 for π, we can simplify the expression to get:

radius ≈ 2.34 cm

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The result of subtracting 7.06 from 4.25 is -2.81.

Let's see how these steps apply to the problem at hand:

4.25

-7.06

In this case, we don't need to borrow because the top number 4.25 is already smaller than the bottom number 7.06.

Starting from the rightmost column, we subtract 5 from 6. Since 6 is larger than 5, we can subtract 5 from 6 and get 1. We write down 1 in the hundredths column.

Next, we move to the tenths column and subtract 2 from 0. We can't do this, so we need to borrow 1 from the digit in the ones column. The 4 in the ones column becomes 3, and the 2 in the tenths column becomes 12.

Now we can subtract 2 from 12, which gives us 10. We write down 0 in the tenths column and carry 1 to the ones column.

In the ones column, we have 3 - 7 - 1 (the borrowed 1) = -5. Since we can't have a negative number in this position, we need to borrow again from the digit in the tens column. The 2 in the tens column becomes 12, and we bring down the borrowed 1 to the ones column.

Now we can subtract 7 from 12, which gives us 5. We write down 5 in the ones column.

Step 4: Bring down any digits that have not been used.

We don't have any digits left to bring down, so we have finished the subtraction.

Therefore, the result of subtracting 7.06 from 4.25 is -2.81.

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The container can contains 3,000 pounds of chemicals.

One cubic foot of a chemical weighs 50 pounds which means 1 ft³ of chemical = 60 pounds

We must  find how many pounds in the container whose dimension 6 ft, 4 ft and 2.5 ft. So, the l = 6 ft, b = 4 ft and h = 2.5 ft.

Volume of box = L*B*H

Volume of box = 6 x 4 x 2.5

Volume of box = 60 ft³

From 1 ft³ of chemical = 60 pounds; then, the 50 ft³ of chemical will be:

= 50 x 60

= 3,000 pounds

Full question "One cubic foot of a chemical weighs 60 pounds. How many pounds of the chemical can a container with the dimensions shown hold? The base is 6, the width is 4, and the height is 2.5"

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Answer:

the table is analysis swap around

Step-by-step explanation:

like if the input is (3,1) the output will be (1,3)

The mean and standard deviation of a sampling distribution of sample means with sample size 249 are 71 and approximately 1.267 respectively when the population has a mean of 71 and standard deviation of 20.

We know that, if the population has mean [tex]=\mu[/tex] and standard deviation [tex]=\sigma[/tex] and if the sampling distribution has sample size of n then

mean of the sampling distribution will be [tex](\mu_{\bar{x}})=\mu[/tex]

and the standard deviation of sampling distribution will be [tex](\sigma_{\bar{x}})=\frac{\sigma}{\sqrt{n}}[/tex]

Here in this problem,

Mean of the population [tex](\mu)[/tex] = 71

Standard Deviation of the population [tex](\sigma)[/tex] = 20

And the sample size of the sampling distribution (n) = 249

So, the mean of sampling distribution [tex](\mu_{\bar{x}})=\mu[/tex] = 71

Standard Deviation of sampling distribution [tex](\sigma_{\bar{x}})=\frac{\sigma}{\sqrt{n}}=\frac{20}{\sqrt{249}} \approx 1.267[/tex] (Correct up to three decimal places)

Hence, the mean and standard deviation of the sampling distribution of sample means with sample size 249 are 71 and 1.267 (approximately) respectively.

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the sets of parametric equation that represents (x-1)²+(y+ 4)² = 9 is:

x = 1 + 3 cosθ

y = -4 + 3 sinθ

( x -1)^2 = (r cosθ)^2

x - 1 = r cosθ

= 3 cosθ

x = 1 + 3 cosθ

y + 4 = 3 sinθ

= y = -4 + 3 sinθ

There, the sets of parametric equation that represents (x-1)²+(y+ 4)² = 9 is:

the sets of parametric equation that represents (x-1)²+(y+ 4)² = 9 is:

x = 1 + 3 cosθ

y = -4 + 3 sinθ

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The question is incomplete, see missing part in the attached image.

The integer conversion specifier that would display the hexadecimal digit "a" is "x".
d) x

To display the hexadecimal digit "a" using an integer conversion specifier.
The "x" specifier is used for displaying an integer value in hexadecimal format with lowercase letters (i.e., a, b, c, etc.), while "X" would display the value in uppercase letters (i.e., A, B, C, etc.).

Options "H" and "h" are not standard integer conversion specifiers for displaying hexadecimal values.

Hence d) x is correct.

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The percent increase for the dinner is 25%

The first step is to calculate the increase

The price rose from $7 to $8.75

Increase= 8.75-7

= 1.75

Therefore the percent increase can be calculated as follows

1.75/7 × 100

= 0.25 × 100

= 25

Hence the percent increase is 25%

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The probability that the first student who enters the room will be assigned to the front row is 4/15.

The probability of an event is calculated by dividing the total number of possible outcomes by the number of possible outcomes.

given that ,

A classroom is arranged with 8 seats in the front row 10 seats in the middle row and 12 seats

The total number of seats in the classroom is 8 + 10 + 12 = 30.

There are thirty seats to choose from because there is only one student entering the room.

However, we want to determine the likelihood that the student will be assigned to one of the eight seats in the front row.

Therefore, the probability of assigning the front row to the first student who enters the room is:

P(front row) = 8/30

Simplifying this fraction gives:

P(front row) = 4/15

As a result, there is a probability of 4/15, or roughly 0.267, that the first student who enters the room will be assigned to the front row.

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Each leg of the triangle has a length of 5√(2) units

Since the triangle is 45-45-90, each of the two legs has the same length, which we'll call x. By the Pythagorean theorem, we know that:

x² + x² = h²

Simplifying this equation, we get:

2x² = h²

To solve for x, we can divide both sides by 2 and then take the square root:

x = h / √(2)

This tells us that each leg of a 45-45-90 triangle is equal to the hypotenuse divided by the square root of 2.

Let's say you have a 45-45-90 triangle with a hypotenuse of length 10. To find the length of each leg, you would use the formula:

x = h / √(2)

Substituting h = 10, we get:

x = 10 / √(2)

To simplify this expression, we can rationalize the denominator by multiplying both the numerator and denominator by √(2):

x = (10 / √(2)) * (√(2) / √(2))

= 10√(2) / 2

= 5√(2)

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Answer:

Step-by-step explanation:

539.22 dollars

So, from the given options, the scatter plot that shows a positive linear association is option B.

A scatter plot is a type of graph that displays the relationship between two variables. Each data point in the scatter plot represents a pair of values for the two variables being plotted, with one variable on the x-axis and the other on the y-axis. Scatter plots are used to examine the correlation or relationship between the variables. If the points on the scatter plot form a pattern that slopes upwards as you move from left to right, it indicates a positive linear association between the variables. If the pattern slopes downwards, it indicates a negative linear association. If there is no pattern or trend, it indicates no correlation between the variables.

Here,

A scatter plot that shows a positive linear association is one where the points on the graph form a pattern that goes upward and to the right.

In option A, the data points do not show a clear upward trend, so this scatter plot does not show a positive linear association.

In option B, there is a clear upward trend in the data points as you move from left to right, so this scatter plot does show a positive linear association.

In option C, the data points do not show a clear upward trend, so this scatter plot does not show a positive linear association.

In option D, the data points do not show a clear upward trend, so this scatter plot does not show a positive linear association.

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The value of the variables as identified from the reciprocal function are;

a = 5

h = -6

k = 7

2. The correct option is Option A

A reciprocal function is a mathematical function that can be represented as f(x) = 1/x, where x ≠ 0.

The graph of a reciprocal function is a hyperbola with two branches that approach the x and y axes, but never touch them.

From the information given, we have the function as;

y = a/x - h + k

Given that the function with numbers is written as;

y = 5/x + 6 + 7

To determine the values of a, h and k, we get;

The variable, a = 5

The variable, k = 7

The variable, h = -(6) = -6

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Answer:

42 degrees

Step-by-step explanation:

So, first to find <QUT, which is a vertical angle, we have to figure out either QUR or TUS.  So:

9x+3=11x-27

solve for x:

x=15

Then, plug it into one of the equations.  Let's use 9x+3.

9(15)+3=138

So, we know that QUR is 138 degrees.

That means that TUS is ALSO 138.

138x2=276

Now we know that QUT and RUS have to equal whatever 360-276 is:

360-276=84

QUT and RUS have to equal 84 degrees, so we DIVIDE by 2.

84/2=42

So, QUT=42 degrees

Answer:

42 Degrees

Step-by-step explanation

Becuase (11x-27) and (9x+3) are vertical angles that means they are equal to each other

(11x - 27) = (9x + 3)

First you will add 27 to both sides

11x -27 = 9x +3

     +27         +27

Making it to:

11x = 9x + 30

Now you need to subtract 9x from both sides

11x = 9x +30

-9x   -9x

Turning it into this

2x= 30

Now Lastly, divide both sides by 2

2x = 30

2x     2x

And the answer is...... X=15

Now that you have the x value, we go back to the 11x-27 and replace the X with 15

11(15) -27 = 138 degress

Now because angle QUT and 138 degrees make a straight line that means together they will be 180 degress so you will subtract 180 by 138

Giving you the final answer of

42 Degrees

The smallest rational number among all the given numbers is equal to 0.2345678.

The rational number are equal to,

-√5 , (1/4), √25 , -√27 , 0.2345678

First simplify each of the given numbers we have,

√5 is an irrational number,

so it is not rational.

1/4 is a rational number.

√25 = 5,

which is a rational number.

-√27 = -3√3,

which is an irrational number, so it is not rational.

0.2345678 is a rational number.

Arrange the rational number in ascending order to get the smallest rational number .

Value of 1/4 = 0.25

0.2345678 < 0.25 < 5

Therefore, the smallest rational number among the given options is 0.2345678.

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he would fit the child size

his height is 145cm and we want to convert it  into inches so the formula is

length/2.54=

145cm/2.54=57.08in

so juan is 57.08 inches, so he fits the child size.

the distance from each chord to the center of the circle is 85 inches.

what is  chord ?

In geometry, a chord is a line segment that connects two points on the circumference of a circle. It is the straight line that intersects a circle at two points. In other words, a chord is a line segment that lies entirely inside the circle and connects two points on the circle.

In the given question,

If we draw a diagram of the circle with diameter 170 inches, we can see that the chords of length 26 inches divide the circle into two regions. We are interested in finding the distance from each chord to the center of the circle.

To solve this problem, we can use the following formula:

distance from chord to center = 1/2 * √(4r² - c²)

where r is the radius of the circle and c is the length of the chord.

First, we need to find the radius of the circle. The radius is half of the diameter, so:

r = 1/2 * diameter = 1/2 * 170 = 85 inches

Next, we can use the formula above to find the distance from each chord to the center of the circle. Plugging in the values we have:

distance from chord to center = 1/2 * √(4r² - c²)

distance from chord to center = 1/2 * √(4(85)² - 26²)

distance from chord to center = 1/2 * √(28,900)

distance from chord to center = 1/2 * 170

distance from chord to center = 85

Therefore, the distance from each chord to the center of the circle is 85 inches.

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Answer:

Great, based on the provided dimensions for Object 1 (the cereal box), here are the formulas and calculations for:

Area of the entire rectangular prism:

A = lw + lh + wh

A = 128 + 121.75 + 8*1.75

A = 96 + 21 + 14 = 131 square inches

Base area:

The base of a rectangular prism is a rectangle. So the base area formula is:

Base area = Length * Width

= 12 inches * 8 inches = 96 square inches

So the formulas are:

Area (entire prism): A = lw + lh + wh

Base area: Base area = Length * Width

In this case:

Length = 12 inches

Width = 8 inches

Height = 1.75 inches

Step-by-step explanation:

a) A recurrence relation, aₙ = aₙ₋₂ + aₙ₋₃

is for the different signals that can be sent in n microseconds.

b) Initial conditions are a₀ = 0, a₁ = a₂ = 1

c) The number of messages sent in 12 microseconds are equal to 16.

A recurrence relation is an equation form for nth term of a sequence of numbers which is equal to some combination of the previous terms. We have a messages are sent over a communications channel using two different signals. Let an be different number of messages that can be transmitted in n microseconds. In case of First signal, it required 2 microsecondes time to tramissmit the signals. So, the different number of signals that can be transmitted in 2 microseconds are [tex]a_{n - 2} [/tex]

In case of second signal , Time required by second signal to to transmit signal = 3

microsecondes

So, different number of messages that can be transmitted in 3 microseconds are

[tex]a_{n - 3} [/tex]

Each signal of a message is transmitted one by one.

a) A recurrence relation for the number of different signals that can be sent in n microseconds is written as

[tex]a_n = a_{n - 2} + a_{n - 3}[/tex]

hat is an us sum of different signals transmitted by each signals.

b) recurrence relation is

[tex]a_n = a_{n - 2} + a_{n - 3}[/tex]

so, the initial conditions of the recurrence relation in part (a) is n = 3 , [tex]a_3 = a_1 + a_0 [/tex]

a₀ = 0, a₁ = 1 , a₂ = 1

c) Different messages can be sent in 12 microseconds is determined by plugging the value in recurrence relation, a₃

= a₁ + a₀ = 1 + 0 = 1

a₄ = 1 + 1 = 2

a₅ = 1 + 1 = 2

a₆ = 2 + 1 = 3

a₇ = 2 + 2 = 4

a₈ = 3 + 2 =5

a₉= 4 + 3 = 7

a₁₀= 5 + 4 = 9

a ₁₁ = 7 + 5 = 12

a₁₂ = 9 + 7 = 16

Hence, required value is 16.

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The antiderivative of f(x) = x/√x  is [tex](2/3)x^{3/2}  + C[/tex],  

where C is the constant of integration.

To find the antiderivative of the given function.

The function is: f(x) = x/√x

First, let's rewrite the function in a more convenient form for integration:
f(x) = x / √x

[tex]= x / x^{1/2}[/tex]

[tex]= x^{1 - 1/2}[/tex]

[tex]= x^{1/2}[/tex]
Now, let's find the antiderivative using the power rule for integration:
∫[tex]x^{1/2} dx[/tex]
To apply the power rule, we need to add 1 to the exponent and then divide by the new exponent:
Antiderivative = [tex](x^{(1/2) + 1)) / ((1/2) + 1} ) + C[/tex]
Antiderivative =[tex](x^{3/2/ 3/2} + C)[/tex]
Finally, multiply by the reciprocal to simplify the expression:
Antiderivative = [tex](2/3)x^{3/2} + C.[/tex].

An antiderivative, also known as an indefinite integral, is a function that, when differentiated, yields a given function. In other words, an antiderivative of a function f(x) is a function F(x) such that F'(x) = f(x).

For example, if f(x) = 2x, then an antiderivative of f(x) would be F(x) = x^2 + C,

where C is a constant of integration.

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No, tripling the length of time for the investment does not double the interest earned with compound interest.

When interest is compounded, the interest earned depends not only on the length of time, but also on the interest rate and the number of compounding periods.

For example, if an investment of $100 earns 5% annual interest compounded annually for 1 year, the interest earned would be:

Interest = $100 x 0.05 = $5

If the same investment is compounded for 2 years instead of 1, the interest earned would be:

Interest = $100 x (1 + 0.05)^2 - $100 = $10.25

As we can see, doubling the length of time for the investment does not double the interest earned with compound interest.

The interest earned depends on the interest rate and the number of compounding periods as well.

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Answer:

x = 3.5 pages per minute

Step-by-step explanation:

We make the relationship

21 pages ------ 6 min

x pages -------- 1 min

So x= (21x1)/(6)

x = 3.5 pages per minute

The correct answer is (b). SSB = SST - SSW

The ANOVA (analysis of variance) test is a statistical method used to compare the means of two or more groups. One useful computational shortcut for this test is expressed as SSB = SST - SSW, where SSB is the sum of squares between groups, SST is the total sum of squares, and SSW is the sum of squares within groups.

The useful computational shortcut for the ANOVA test is expressed as:

SSB = SST - SSW

where SSB is the sum of squares between groups, SST is the total sum of squares, and SSW is the sum of squares within groups.

Option (b) is the closest, but it has a typo. It should be:

SSB = SST - SSW

Therefore, the correct answer is (b).

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The useful computational shortcut for the ANOVA test is SSW = SST - SSB

therefore,option d. SSW = SST - SSB is correct.


ANOVA (Analysis of Variance) is a statistical test used to analyze differences between group means.

The test involves partitioning the total variation into two components:

variation between groups (SSB, sum of squares between) and variation within groups (SSW, sum of squares within).

The total sum of squares (SST) represents the overall variability in the dataset.

The computational shortcut for ANOVA states that the sum of squares within groups (SSW) can be calculated by

subtracting the sum of squares between groups (SSB) from the total sum of squares (SST).

So, SSW = SST - SSB.

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The height of the tree is 44.4 feet.

Height is the vertical distance between two points.

To calculate the height of the tree, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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The measures of the other two angles in the parallelogram are both 143 degrees.

A parallelogram is a quadrilateral with two sides that are parallel to one another. A parallelogram has equal-length opposite sides and equal-length opposite angles. The internal angles that are extra to the transversal on the same side. A parallelogram's total interior angles add up to 360 degrees.

A parallelogram is formed by the junction of two parallel lines, and its opposite angles are equal.

Then, there are two 35 degree angles. Two further angles that are equivalent are noted: A parallelogram's angles add up to 360 degrees. Following that, x+x+37+37=360

2x=360-74

2x=286

x=143.

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Area of sector GHJ ≈ 2.04 square units

Since we are given the central angle GHJ in degrees and the radius GH of circle H, we can find the area of sector GHJ using the formula:

Area of sector GHJ = (θ/360) × πr^2

where θ is the central angle in degrees and r is the radius.

Substituting the given values, we get:

Area of sector GHJ = (46/360) × π(4)^2

= (0.1278) × 16π

= 2.0448 square units

Rounding to the nearest hundredth, we get:

Area of sector GHJ ≈ 2.04 square units

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