The total amount that Meihua pays for the 36 pencils is 9M - 36n
How much did she pay altogether?We know that a set of 4 pencils has a price M, then the price of each single pencil is:
P = M/4
And we also know that Meihua got a discount of n in each pencil, so the price that she pays for each pencil is:
P = M/4 - n
Now we know that she buys 36 of these, so the amount that she pays is given by the product:
amount = 36*(M/4 - n)
amount = 9M - 36n
Learn more about products at.
https://brainly.com/question/10873737
#SPJ1
Here are a few pairs of positive numbers whose sum is 34. (3 pts)
a. Find the product of each pair of numbers.
First
Number
1
4
8
14
Second
Number
33
30
26
20
b. Which pair of numbers that have a sum of 34 will produce the largest possible
product? What is that product?
Answer: 280
Step-by-step explanation:
The products of each pair of numbers are:
1 x 33 = 33
4 x 30 = 120
8 x 26 = 208
14 x 20 = 280
b. To find the pair of numbers that will produce the largest possible product, we need to look for the pair with the closest product to 340 (the square of 17, which is the average of the two numbers).
The pair of numbers with the closest product to 340 is 14 and 20, whose product is 280. Therefore, the pair of numbers that will produce the largest possible product is 14 and 20, and the product is 280.
The US Department of Energy reported that 45% of homes were heated by natural gas. A random sample of 314 homes in Oregon found that 175 were heated by natural gas. Test the claim that proportion of homes in Oregon that were heated by natural gas is different than what was reported. Use a 5% significance level.
The proportion of homes in Oregon heated by natural gas is different than the reported national average of 45%.
Hypothesis testingNull hypothesis: The proportion of homes in Oregon heated by natural gas is the same as the reported national average of 45%.
Alternative hypothesis: The proportion of homes in Oregon heated by natural gas is different than the reported national average of 45%.
We can use a two-tailed z-test to test this hypothesis.
The test statistic is calculated as:
z = (p - P) / √[P(1-P)/n]
where p is the sample proportion, P is the hypothesized population proportion (0.45), and n is the sample size.
Using the values given in the problem, we have:
p = 175/314 = 0.557
P = 0.45
n = 314
Plugging these values into the formula, we get:
z = (0.557 - 0.45) / √[0.45(1-0.45)/314] = 3.039
Using a standard normal distribution table, we find that the probability of getting a z-value of 3.039 or higher (in absolute value) is less than 0.005.
Since the significance level is 0.05, which is greater than the p-value, we can reject the null hypothesis and conclude that there is evidence to support the alternative hypothesis.
Therefore, the proportion of homes in Oregon heated by natural gas is different than the reported national average of 45%.
More on hypothesis testing can be found here: https://brainly.com/question/30588452
#SPJ1
the data on the graph show the foot lengths and forearm lengths for a group of people. the line of best fit for the data is shown. use equation on the line of best fit to re-edit the length of a persons forearm if the length of their is 8 inches
The length of a person’s forearm if the length of their foot is 8 inches.
Define linear equation!A linear equation is an equation that describes a straight line on a graph. It is an algebraic equation that involves two variables, usually x and y, and can be written in the form of y = mx + b, where m is the slope of the line and b is the y-intercept.
The slope of a line is the measure of the steepness of the line, or how much it rises or falls for a given change in x. It can be calculated as the change in y divided by the change in x between any two points on the line.
The y-intercept is the point where the line crosses the y-axis, or the value of y when x is zero.
Let
x ----> Length of Foot in inches
y ----> Length of Forearm in inches
we have
y=1.11x-0.83
For x=8 in
To find y, change the value of x in the linear equation.
y=1.11(8)-0.83=8.05in
To know more about slope visit:
brainly.com/question/3605446
#SPJ1
The complete question is :
The data on the graph show the foot lengths and forearm lengths for a group of people. The line of best fit for the data is shown. Use the equation of the line of best fit to predict the length of a person’s forearm if the length of their foot is 8 inches.
A graph is labeled as Foot Length versus Forearm Length. The horizontal axis is labeled as Length of Foot left parenthesis inches right parenthesis and the vertical axis is labeled as Length of Forearm left parenthesis inches right parenthesis. The values on the horizontal axis range from 0 to 15 in increments of 1 and the values on the vertical axis range from 0 to 15 in increments of 1. Several points are scattered throughout the graph and a line is shown which passes between these points and the equation of the line is labeled as y equals 1 decimal point 1 1 x minus 0 decimal point 8 3.
A.8.88 inches
B.6.94 inches
C.9.16 inches
D.8.05 inches
Find the x-intercepts.
2x² - 3x + 1
y = 2x² + 8x + 6
у
(0.5, [?]). ([ ], [ ]
Answer:
(½,0),(1,0)
...............
Answer:
Step-by-step explanation:
To find the x-intercepts of a function, we set y = 0 and solve for x.
For the function 2x² - 3x + 1:
2x² - 3x + 1 = 0
We can use the quadratic formula to solve for x:
x = [ -(-3) ± sqrt( (-3)² - 4(2)(1) ) ] / (2*2)
x = [ 3 ± sqrt(1) ] / 4
x = 1/2 or x = 1
Therefore, the x-intercepts are (1/2, 0) and (1, 0).
For the function y = 2x² + 8x + 6:
2x² + 8x + 6 = 0
We can simplify this equation by dividing both sides by 2:
x² + 4x + 3 = 0
This equation factors as:
(x + 3)(x + 1) = 0
So the solutions are x = -3 and x = -1.
Therefore, the x-intercepts are (-3, 0) and (-1, 0).
For the coordinates (0.5, [?]).
To find the y-coordinate of the point (0.5, [?]), we can substitute x = 0.5 into the equation for the function:
y = 2(0.5)² + 8(0.5) + 6
y = 2(0.25) + 4 + 6
y = 5.5
Therefore, the coordinates are (0.5, 5.5).
For the coordinates ([ ], [ ]).
Without knowing the specific function, we cannot determine the x-intercepts or any other information about the graph. We would need to know the equation of the function or have additional information about the graph.
You are going to start a business making chicken sandwiches and hamburgers. You have a budget of $750. The chicken sandwich costs $2.75 to make and the hamburger costs $1.95 to make. Which inequality models the situation?
A. 2.75x+1.95y ≤ 750, where x is # of chicken sandwiches and y is # of hamburgers
B. 2.75x+1.95y = 750, where x is # of chicken sandwiches and y is # of hamburgers
C. 2.75x+1.95y ≥ 750, where x is # of chicken sandwiches and y is # of hamburgers
The correct option is A, the inequality is:
2.75x + 1.95y ≤ 750
Which inequality models the situation?Let's define the variables we will be using:
x = number of chicken sandwiches
y = number of hamburgers.
We know that the budget is $750, and the chicken sandwich costs $2.75 to make and the hamburger costs $1.95 to make, then we can write the inequality:
"Total cost equal to or smaller than 750"
2.75x + 1.95y ≤ 750
That is what we can see in option A, so that is the correct one.
Learn more about inequalities at:
https://brainly.com/question/24372553
#SPJ1
A box is 11 inches high, 18 inches long and 8 inches wide. What is the longest poster you could fit in the box? Explain why you can only fit one maximum length poster in the box but you can fit multiple 21 inch posters in the same box
Answer: the longest poster that could fit in the box is approximately 22.56 inches long.
Step-by-step explanation: Utilizing the Pythagorean theorem, able to calculate the corner to corner as takes after:
diagonal^2 = 11^2 + 18^2 + 8^2
diagonal^2 = 121 + 324 + 64
diagonal^2 = 509
inclining = sqrt(509)
corner to corner ≈ 22.56 inches
you are painting a mural of colored equilateral triangles. The radius of each triangle is 12.7 inches. What is the area of each triangle to the nearest square inch?
The area of each triangle to the nearest square inch is approximately 95 square inches.
What is triangle?A triangle is a 2-dimensional geometric shape that consists of three straight sides and three angles. It is one of the basic shapes in geometry, and it is widely used in various fields such as mathematics, engineering, architecture, and art.
According to given information:To find the area of an equilateral triangle with a radius of 12.7 inches, we can use the formula:
Area = [tex](\sqrt{(3)/4})[/tex] x [tex](side)^2[/tex]
where side is the length of one of the sides of the equilateral triangle.
We know that the radius of the equilateral triangle is 12.7 inches, which means that the distance from the center of the triangle to one of the corners (i.e., the length of one of the sides) is also 12.7 inches. To find the length of the side, we can use the formula for the height of an equilateral triangle:
and solve for side:
side = Height / ([tex]\sqrt{(3)/2[/tex]) = (2 x Height) / [tex]\sqrt{(3)[/tex]
Plugging in the value of the radius, we have:
side = (2 x 12.7 inches) / [tex]\sqrt{(3)[/tex] ≈ 14.67 inches
Now we can use the formula for the area of an equilateral triangle:
Area = ([tex]\sqrt{(3)/4}[/tex]) x [tex](side)^2[/tex]
Plugging in the value of the side, we have:
Area = ([tex]\sqrt{(3)/4[/tex]) x [tex](14.67 inches)^2[/tex] ≈ 94.71 square inches
Therefore, the area of each triangle to the nearest square inch is approximately 95 square inches.
To know more about triangle visit:
https://brainly.com/question/1058720
#SPJ1
Suppose that the value of a stock varies each day from $9.82 to $26.17 with a uniform distribution. Find the third quartile; 75% of all days the stock is below what value? (Enter your answer to the nearest cent.)
The third quartile if the distribution is $22.08.
How to find the third quartileTo find the third quartile, we need to find the value of the stock that separates the top 25% of days from the bottom 75%.
Since the distribution is uniform, we can find the third quartile by taking 75% of the range and adding it to the minimum value.
The range of the stock is:
$26.17 - $9.82 = $16.35
75% of the range is:
0.75 x $16.35 = $12.26
Adding this to the minimum value gives us the third quartile:
$9.82 + $12.26 = $22.08
So the third quartile is $22.08.
Learn more about third quartile at
https://brainly.com/question/9180614
#SPJ1
I'm having a hard time finding the period, amplitude, and sinusoidal equation of this graph. I don't know if I'm supposed to use sine or cos. Please help me
The period of the sinusoidal equation of the graph is 4 months.
The amplitude of the sinusoidal equation of the graph is 84 degrees Celsius.
What is the period and amplitude of a wave?The period and amplitude are two important characteristics of a wave.
Period: The period of a wave is the time it takes for one complete cycle of the wave to occur. The period of a wave determines its frequency, which is defined as the reciprocal of the period.
Amplitude: The amplitude of a wave is the maximum displacement of the wave from its equilibrium position. In simpler terms, it represents the height or strength of the wave.
In then given graph, the period of the wave = 1 complete cycle in 4 months = 4 months/cycle = 4 months
Amplitude = 84 degrees Celsius.
Learn more about amplitude and period here: https://brainly.com/question/23713359
#SPJ1
SOMEONE PLSSS HELPP
What is the volume of this figure?
Enter your answer in the box.
ft³
The volume of the composite figure is 3300 cubic feet.
What is the volume of the figure?From the question, we have the following parameters that can be used in our computation:
The composite figure that has:
CuboidCuboidThe volume V of a cuboid is given by the formula:
V = l × w × h
For the first, the length is 24 ft, the width is 5 ft, and the height is 25 ft. For the second, the length is 4 ft, the width is 3 ft, and the height is 25 ft.Therefore, the volume is:
Volume = 24 ft × 5 ft × 25 ft + 4 ft * 3 ft * 25 ft
V = 3300 cubic feet
So the volume is 3300 cubic feet.
Read more about volume at
https://brainly.com/question/463363
#SPJ1
You need a 60% alcohol solution. On hand, you have a 130 mL of a 55% alcohol mixture. You also
have 70% alcohol mixture. How much of the 70% mixture will you need to add to obtain the desired
solution?
Therefore , the solution of the given problem of unitary method comes out to be 70% alcohol combination with 130 mL of the 55% alcohol mixture.
What is a unitary method?Use the tried-and-true fundamental method, the real variables, and any useful information you learn from the broad and specific questions to complete the assignment. Customers may be given another chance to taste expression the products in response. If these improvements don't happen, we'll lose out on significant expression advances in programming understanding.
Here,
Let x represent the required amount (in mL) of the 70% alcohol mixture.
The total amount of alcohol in the final mixture would be equal to the desired 60% alcohol solution since it would be the sum of the alcohol in the 55% alcohol mixture and the alcohol in the 70% alcohol mixture.
=> 0.55 * 130 + 0.70 * x = 0.60 * (130 + x)
=> 71.5 + 0.70x = 78 + 0.60x
=> 0.10x = 6.5
=> x = 65
Therefore, to create a 60% alcohol solution, you would need to combine 65 mL of the 70% alcohol combination with 130 mL of the 55% alcohol mixture.
To know more about unitary method visit:
https://brainly.com/question/28276953
#SPJ1
NO LINKS!! URGENT HELP PLEASE!!!!
Express the statement as an inequality part 10a^2
The inequality that represents the sentence that the absolute value of x is greater than 6 is given as follows:
|x| > 6.
What are the inequality symbols?The four inequality symbols, along with their meaning on the number line and the coordinate plane, are presented as follows:
> x: the amount is greater than x -> the number is to the right of x with an open dot at the number line. -> points above the dashed horizontal line y = x on the coordinate plane.< x: the amount is less than x. -> the number is to the left of x with an open dot at the number line. -> points below the dashed horizontal line y = x on the coordinate plane.≥ x: the amount is at least x. -> the number is to the right of x with a closed dot at the number line. -> points above the solid vertical line y = x on the coordinate plane.≤ the amount is at most x. -> the number is to the left of x with a closed dot at the number line. -> points above the dashed vertical line y = x on the coordinate plane.The absolute value of x is represented as follows:
|x|.
The inequality that represents the absolute value being greater than six is gjven as follows:
|x| > 6.
More can be learned about inequalities at brainly.com/question/25275758
#SPJ1
Answer:
|x| > 6
Step-by-step explanation:
The correct statement is: |x| > 6.
This means that the distance between x and 0 on the number line is greater than 6 units, so x can be any number greater than 6 or less than -6.
The options given are:
|x| < 6: This statement indicates that the distance of x from 0 on the number line is less than 6 units. In other words, x could be any value between -6 and 6, not including -6 and 6.|x| > 6: This statement indicates that the distance of x from 0 on the number line is greater than 6 units. Therefore, x could be any value less than -6 or greater than 6.|x| = 6: This statement indicates that the distance of x from 0 on the number line is exactly 6 units. Therefore, x could be either 6 or -6.|x| ≥ 6: This statement indicates that the distance of x from 0 on the number line is greater than or equal to 6 units. Therefore, x could be any value less than or equal to -6 or greater than or equal to 6.|x| ≤ 6: This statement indicates that the distance of x from 0 on the number line is less than or equal to 6 units. In other words, x could be any value between -6 and 6, including -6 and 6.Therefore, the correct statement is |x| > 6.
here's how to express the statement |x| > 6 as an inequality part 10a^2
| x | > 6
Squaring both sides of this inequality, we get:x^2 > 6^2
Simplifying, we get:x^2 > 36
Multiplying both sides by 10, we get:10x^2 > 360
So the inequality we get after multiplying both sides by 10 is:10x^2 - 360 > 0
Therefore, the inequality for |x| > 6 in terms of 10a^2 is:10x^2 - 360 > 0
Note that this inequality does not directly involve "a," as it is not mentioned in the original statement.
HELP!!!!!!!!!!! 50 POINTS!
The equation that can be used to find the time, t, it takes for the ball to reach the ground is D -16t² + 18t +1.2 = 0.
How to explain the equationAn equation simply has to do with the statement that illustrates the variables given.
In this case, Madison hits a tennis ball with an initial velocity of 18 m/s straight up into the air. When she hits the ball, it is 1.2 m above the ground.
The equation can be used to find the time, t, it takes for the ball to reach the ground will be -16t² +18t +1.2 = 0.
The appropriate option is D.
Learn more about equations on
https://brainly.com/question/2972832
#SPJ1
The equation that can be used to find the time, t, it takes for the ball to reach the ground is D -16t² + 18t +1.2 = 0.
How to explain the equation
An equation simply has to do with the statement that illustrates the variables given.
In this case, Madison hits a tennis ball with an initial velocity of 18 m/s straight up into the air. When she hits the ball, it is 1.2 m above the ground.
The equation can be used to find the time, t, it takes for the ball to reach the ground will be -16t² +18t +1.2 = 0.
The appropriate option is D.
The diameter of a circle is 32 miles. What is the circle's circumference? d=32 mi Use 3.14 for .
200.96 is the circle's circumference .
What is a circle, exactly?
A circle is a closed, two-dimensional object in which the distances between every point in its plane and its centre are all equal. The creation of the reflection symmetry line is influenced by each line that crosses the circle.
Additionally, any angle surrounding the centre exhibits rotational symmetry. A figure with a circular form that lacks both sides and edges is referred to as a circle. A circle can be referred to in geometry as a closed form, a two-dimensional shape, or a curved shape.
C = 2πr
C = 2 *π * 32
C = 2 x 3.14 x 32
C = 200.96
Learn more about circle
brainly.com/question/29142813
#SPJ1
Find the length of
hk
Answer:
4 1/2
Step-by-step explanation:
If two chords intersect in a circle, the product of the lengths of the segments of one chord equal the product of the segments of the other.
JH * HK = GH * HI
3 * (2x+1) = 2 ( x+5)
Distribute
6x+3 = 2x+10
Subtract 2x from each side.
6x-2x+3 = 2x-2x+10
4x+3 = 10
Subtract 3 from each side.
4x = 10-3
4x= 7
Divide by 4.
x = 7/4
Now find HK.
HK = 2x+1
= 2(7/4)+1
= 7/2+1
= 9/2
= 4 1/2
The depth of water at a dock can be modeled as y = 3 sin(x) +7. At low tide, the water is 4 feet
deep. What is the depth of water at high tide (its maximum point)?
Step-by-step explanation:
At low tide depth = (3)(-1) + 7 = 4
at HIGH tide depth = (3) (+1) + 7 = 10 feet
solve this........ w/3 - 1 ≥ 4
The equivalent value of the inequality is w ≥ 15
Given data ,
Let the inequality equation be represented as A
Now , the value of A is
w/3 - 1 ≥ 4
On simplifying , we get
Adding 1 on both sides , we get
w/3 ≥ 5
Multiply by 3 on both sides , we get
w ≥ 15
Therefore , the value of w is greater than or equal to 15
Hence , the inequality is w ≥ 15
To learn more about inequality equations click :
https://brainly.com/question/11897796
#SPJ1
Once a person has identified the ways they are wasting money instead of spending it, what can they do?
Answer:
Once a person has identified the ways they are wasting money, there are several steps they can take to stop wasting money and start saving it:
Create a budget: A budget can help you track your spending and identify areas where you can cut back. It can also help you prioritize your spending and make sure you are putting your money towards the things that matter most to you.By taking these steps, a person can stop wasting money and start building a solid financial foundation for the future.
Kelly’s bill at a restaurant came to $21.52. If she decides to leave a 18% tip, how much of a tip did she leave
Answer:
$3.87 for the 18% tip.
Jilby Share if you could find it :) If 3+1=34 2+2=44 2+3=65 5+3=158 then 7+2=?
Write an equation that helps D'angela determine the amount of money she must save each month to 500$ in her saving account
The equation that helps her is $65 + 5m = $500. D'angela must save $87 each month for the next 5 months to reach her goal of having $500 in her savings account.
What is system of equation?A group of equations that must be solved simultaneously is referred to as a system of equations. The variables in the equations are interconnected, and the set of values for the variables that satisfy all of the system's equations is the solution. Depending on whether the equations feature linear or nonlinear interactions between the variables, a system of equations can be either linear or nonlinear. A vast range of phenomena, including physical systems, economic systems, and social systems, are modelled using systems of equations, which appear in many branches of mathematics and science.
Let us suppose the amount of money saved by her = m.
The, for 5 months the amount saved is = 5m.
Given an initial deposit of $65, we have the equation of total amount as:
T = $65 + 5m
Now, she needs to save $500 thus,
$65 + 5m = $500
5m = $500 - $65
5m = $435
m = $87
Hence, D'angela must save $87 each month for the next 5 months to reach her goal of having $500 in her savings account.
Learn more about system of equations here:
https://brainly.com/question/30054947
#SPJ1
The complete question is:
The lengths of the sides of a right triangle are three consecutive integers, right, and solve an equation to find the three integers
The only possible solution is x = 2. Therefore, the three consecutive integers that form the sides of the right triangle are 2, 3, and 4.
How to find side of triangle?Since they are consecutive integers, let's assume that the hypotenuse, which is the longest side of the right triangle, is x+2, as it is three units longer than the shortest side.
In a right triangle, the hypotenuse's square is equal to the sum of the squares of the other two sides, according to the Pythagorean theorem. We can thus write:
[tex](x+2)^2 = x^2 + (x+1)^2[/tex]
Expanding the squares, we get:
[tex]x^2 + 4x + 4 = x^2 + x^2 + 2x + 1[/tex]
Simplifying and rearranging terms, we get:
[tex]2x^2 - 2x - 3 = 0[/tex]
We can solve this quadratic equation by using the quadratic formula:
x = (-b ± [tex]\sqrt{b^2 - 4ac}[/tex]) / 2a
where a = 2, b = -2, and c = -3.
Plugging in these values, we get:
x = (-(-2) ± [tex]\sqrt{((-2)^2 - 4(2)(-3)))[/tex] / 2(2)
x = (2 ± [tex]\sqrt{(4 + 24))[/tex] / 4
x = (2 ± [tex]\sqrt28}[/tex] / 4
x = (2 ± [tex]2\sqrt{7}[/tex]) / 4
x = 1/2 ± [tex]\sqrt{7}[/tex]/2
The only option is x = 2, since x must be an integer. As a result, the numbers 2, 3, and 4 are the three consecutive integers that make up the sides of the right triangle.
know more about triangle visit :
https://brainly.com/question/2773823
#SPJ1
100 points and I will give brainlist but before I get released, I have to verify answers
A simplification of the fractions (-5/8) ÷ (-3/4) is equal to: B. -20/24.
The step in which Johnetta made her error include the following: A. step 1.
What is a fraction?In Mathematics and Geometry, a fraction simply refers to a numerical quantity (numeral) which is not expressed as a whole number. This ultimately implies that, a fraction is simply a part of a whole number.
Based on the information provided above, the division can be calculated as follows;
Fraction = (-5/8) ÷ (-3/4)
Fraction = -5/8 × (-4/3)
Fraction = -20/24
For Johnetta, we have:
Fraction = 7/9 ÷ 3/8
Fraction = 7/9 × 8/3
Fraction = 56/27
Read more on fraction here: brainly.com/question/29367657
#SPJ1
Suppose that the function h is defined, for all real numbers, as follows.
h(x) =
-2 if x-2
-1 if x=-2
Find h(-5), h (-2), and h (5).
h(-5) =
h (-2) = 0
h (5) = 0
8
X
S
The given function h(x) is h(-5) = -2, h(-2) = -1 and h(5) = -2.
What is the defined function for all real numbers?The set of all possible inputs is the domain of a function. For instance, all real integers other than x=0 are in the domain of f(x)=x2 and g(x)=1/x, respectively. Additionally, custom functions with more restricted domains can be defined.
The definition of the function h(x) is as follows:
h(x) =
-2 if x < 2
-1 if x = -2
Using this definition, we can find the values of h(-5), h(-2), and h(5) as follows:
h(-5): Since -5 < 2, we use the first part of the definition and set h(-5) = -2.
h(-2): Since -2 = -2, we use the second part of the definition and set h(-2) = -1.
h(5): Since 5 > 2, we use the first part of the definition and set h(5) = -2.
Therefore, we have:
h(-5) = -2
h(-2) = -1
h(5) = -2
To know more about function visit:-
https://brainly.com/question/12431044
#SPJ1
Use the properties of logarithms to rewrite the expression. Simplify the result if possible. Assume all variables represent positive real numbers.
For the given logarithmic expression the simplified result is given by option b.) [tex]2 \log_b({x})-\frac{7}{3} \log_b({y) -\frac{8}{3} \log_b (z) \\\end{align*}[/tex].
How to solve logarithmic expression?Check for the type of logarithmic expression.Make use of logarithmic properties to simplify the expression.Further simplify using algebric methods.Check for more answers or further simplify the statement if necessary.[tex]\begin\text{Given \;expression:} \quad & \log_b \sqrt[3]{\frac{x^6}{y^7 \cdot z^8}} \\[/tex]
[tex]\text{1: Simplify the expression inside the cube root:} \quad & \frac{(x^6)^{\frac{1}{3}}}{((y^7 \cdot z^8)^{\frac{1}{3}})} \\\\[/tex][tex]\text{2: Simplify the exponents:} \quad & x^{6 \cdot \frac{1}{3}} = x^2, \quad (y^7 \cdot z^8)^{\frac{1}{3}} = y^{\frac{7}{3}} \cdot z^{\frac{8}{3}} \\\\[/tex]
[tex]\text{3: Substitute the simplified expression back:} \quad & \log_b\frac{x^2}{y^{\frac{7}{3}} \cdot z^{\frac{8}{3}}} \\\end{align*}[/tex]
Now Using ,[tex]\log_c\frac{a}{b}} = \log_c a -\log_cb[/tex]
[tex]\text{4: Equation becomes:} \quad & \log_b({x^2})-\log_b({y^{\frac{7}{3}} \cdot z^{\frac{8}{3})}} \\\end{align*}[/tex]
Also, [tex]\log_c{b^n}} = n\log_c b[/tex]
[tex]\text{5: Using property stated above, we get:} \quad &2 \log_b({x})-\frac{1}{3} \log_b({y^7 \cdot z^{{8}}) \\\end{align*}[/tex]
Finally,[tex]\log_c{a}\cdot{b}} = \log_c a +\log_cb[/tex]
[tex]\text{6:Making the final result:} \quad &2 \log_b({x})-\frac{7}{3} \log_b({y) -\frac{8}{3} \log_b (z) \\\end{align*}[/tex]
Thus, option b is the required result.
Learn more about logarithmic expression here:
https://brainly.com/question/24211708
#SPJ1
Write the equation for a parabola with a focus at (-8,-1) and a directrix at y=-4
Answer:
y=(x+8)^2/6 - 5/2
Step-by-step explanation:
Khan Academy
I really need help on question (if you solve your very smart ) . If answers correct I'll rate 5 stars , a thanks and maybe even brainy.
Billy has x pounds. Liam has twice as much money as billy. Nicola has 3 times as much money as liam. The total amount of money they have is £180 pounds.
A) form an expression in terms of x and find out how much money they have.
Answer:
Billy has £20, Liam has £40, and Nicola has £120. The total amount of money they have is £180, as given in the problem.
Step-by-step explanation:
Let's start by defining the variables:
Billy's money: x pounds
Liam's money: 2x pounds (twice as much as Billy)
Nicola's money: 3(2x) = 6x pounds (three times as much as Liam)
The total amount of money they have is £180, so we can write an equation:
x + 2x + 6x = 180
Simplifying the left side of the equation:
9x = 180
Solving for x:
x = 20
Now we can find out how much money each person has:
Billy: x = 20 pounds
Liam: 2x = 2(20) = 40 pounds
Nicola: 6x = 6(20) = 120 pounds
A right triangle has legs that measure
6 centimeters and 3 centimeters.
What is the length of the hypotenuse in centimeters?
Answer:
Step-by-step explanation:
Greetings!Answer:[tex]\sqrt{85} or 9.22
Answer:
Step-by-step explanation:
The length of the Hypotenuse should be [tex]\sqrt{45}[/tex] , 6.70.
By Pythagoras' Theorem, [tex]a^{2}[/tex] + [tex]b^{2}[/tex] = [tex]c^{2}[/tex].
so, Let a =6cm, b =3cm
[tex]6^{2}[/tex] + [tex]3^{2}[/tex] = 45
Therefore,
The length of the hypotenuse will be either [tex]\sqrt{45}[/tex]
1- Assume X is a Normal random variable with mean 20 and variance 25. Find the following:
(a) P (X < 15)
(b) P (X > 30)
(c) P (18 ≤ X ≤ 25)
2. Assume ∼(0,1). Find the following:
(a) a such that P (X < a) = 0.95
(b) b such that P (X ≤ b) = 0.05
(c) c such that P (X > c) = 0.8485
1) The value of given random variable having mean 20 and variance 25 is (a) 0.1587, (b) 0.0228 and (c) 0.5328.
2) The z-score corresponding to a probability of a) 0.95 is 1.645, b) 0.05 is -1.645 and c) 0.1515 is -1.04.
What about mean?The mean is a measure of central tendency, which represents the average value of a set of numbers. It is calculated by adding up all the values in the set and then dividing by the total number of values.
According to question:1) (a) We can standardize the random variable X using the formula z = (X - μ) / σ, where μ is the mean and σ is the standard deviation. Therefore,
z = (15 - 20) / 5 = -1
Using a standard normal distribution table or calculator, we can find P(Z < -1) = 0.1587.
(b) Similarly, we have
z = (30 - 20) / 5 = 2
Using the standard normal distribution table or calculator, we can find P(Z > 2) = 0.0228.
(c) To find P(18 ≤ X ≤ 25), we can again standardize the random variable:
z1 = (18 - 20) / 5 = -0.4
z2 = (25 - 20) / 5 = 1
Then we can use the standard normal distribution table or calculator to find P(-0.4 ≤ Z ≤ 1) = 0.5328.
2) (a) Since we are given that X is a standard normal random variable, we can use the standard normal distribution table or calculator to find the value of a such that P(X < a) = 0.95. From the table, we find that the z-score corresponding to a probability of 0.95 is 1.645. Therefore,
a = μ + σ * z = 0 + 1 * 1.645 = 1.645
(b) Similarly, we can find the value of b such that P(X ≤ b) = 0.05 using the standard normal distribution table or calculator. From the table, we find that the z-score corresponding to a probability of 0.05 is -1.645. Therefore,
b = μ + σ * z = 0 + 1 * (-1.645) = -1.645
(c) We want to find the value of c such that P(X > c) = 0.8485. Since the normal distribution is symmetric about the mean, we know that P(X > c) = 1 - P(X < c), so we can find the value of c such that P(X < c) = 1 - 0.8485 = 0.1515. From the standard normal distribution table, we find that the z-score corresponding to a probability of 0.1515 is -1.04. Therefore,
c = μ + σ * z = 0 + 1 * (-1.04) = -1.04.
To know more about mean visit:
brainly.com/question/31101410
#SPJ1
Please hurry due today I will give you brainlest if correct
what are the steps for using a compass and straightedge to construct a line through point A that is parallel to line j? Drag the steps and drop them in order from start to finish.
1. place the point of the compass on point Q and open it to width QR
2. use the straightedge to draw AB-->.
3. Use the straightedge to draw a line k that passes through A and intersects line j. label the point A and draw an arc that intersects line k. Label the intersection as point S.
4. With the compass opening set to width QR, place the point of the compass on point S and draw an arc that intersects the arc that was drawn from point A. Lab the intersection of the arcs as point B. 5. Place the point of the compass on the point P and draw an arc that intersects lines j and k. label the intersections as points Q and R
Answer:
1. Place the point of the compass on point Q and open it to width QR.
2.Place the point of the compass on the point P and draw an arc that intersects lines j and k. Label the intersections as points Q and R.
3.Use the straightedge to draw a line k that passes through A and intersects line j. Label the point A and draw an arc that intersects line k. Label the intersection as point S.
4. With the compass opening set to width QR, place the point of the compass on point S and draw an arc that intersects the arc that was drawn from point A. Label the intersection of the arcs as point B.
5. Use the straightedge to draw AB -->.
Step-by-step explanation: