Answer:
-175
Step-by-step explanation:
230 = 55-y
230 - 55=-y
175= - y
y= -175
Just move the numbers to one side and variables to the other
QUESTION:
Identify the slope and y-intercept of the function y = 3x - 6
ANSWER:
In all choices the correct answer is ![\green{\boxed{B}}](https://tex.z-dn.net/?f=%5Cgreen%7B%5Cboxed%7BB%7D%7D)
Slope: ![\green{{3}}](https://tex.z-dn.net/?f=%5Cgreen%7B%7B3%7D%7D)
y-intercept: ![\green{{0, -6}}](https://tex.z-dn.net/?f=%5Cgreen%7B%7B0%2C%20-6%7D%7D)
EXPLANATION:
The slope-intercept form is
where
is the slope and
is the y-intercept
![\green{{y = mx + b}}](https://tex.z-dn.net/?f=%5Cgreen%7B%7By%20%3D%20mx%20%2B%20b%7D%7D)
Find the values of
and
using the form:
![\green{{y = mx + b}}](https://tex.z-dn.net/?f=%5Cgreen%7B%7By%20%3D%20mx%20%2B%20b%7D%7D)
![\green{{m = 3}}](https://tex.z-dn.net/?f=%5Cgreen%7B%7Bm%20%3D%203%7D%7D)
![\green{{b = -6}}](https://tex.z-dn.net/?f=%5Cgreen%7B%7Bb%20%3D%20-6%7D%7D)
The slope of the line is the value of
, and the y-intercept is the value of ![\blue{{b}}](https://tex.z-dn.net/?f=%5Cblue%7B%7Bb%7D%7D)
Slope: ![\green{\boxed{3}}](https://tex.z-dn.net/?f=%5Cgreen%7B%5Cboxed%7B3%7D%7D)
y-intercept: ![\green{\boxed{(0, -6)}}](https://tex.z-dn.net/?f=%5Cgreen%7B%5Cboxed%7B%280%2C%20-6%29%7D%7D)
hope it's helps
Answer:
-25 points
Step-by-step explanation:
they had 20 points and subtracted by 30 leaves you with -10 and they lost another 15 points making it -25
No they are not because it can be simplified
The coefficient of variation is 20%
The lower limit is 9 and the upper limit is 21
<h3 /><h3>How to calculate the coefficient of variation</h3>
Given the following parameters
- Sample mean "x" = 15
- standard deviation 's" = 3
The coefficient of variation is expressed as:
coefficient of variation = s/x * 100
coefficient of variation = 3/15 * 100
coefficient of variation = = 20%
Hence the coefficient of variation is 20%
The formula for the Chebyshev interval is given as:
![(x- 3k, x + 3k)](https://tex.z-dn.net/?f=%28x-%203k%2C%20x%20%2B%203k%29)
Get the value of k using the formula below:
![0.75=1-\frac{1}{k^2}\\ 0.25 = \frac{1}{k^2} \\k^2= \frac{1}{0.25} \\k = 2](https://tex.z-dn.net/?f=0.75%3D1-%5Cfrac%7B1%7D%7Bk%5E2%7D%5C%5C%200.25%20%3D%20%5Cfrac%7B1%7D%7Bk%5E2%7D%20%5C%5Ck%5E2%3D%20%5Cfrac%7B1%7D%7B0.25%7D%20%5C%5Ck%20%3D%202)
Get the required interval
![(15- 3(2), 15 + 3(2))\\(9,21)](https://tex.z-dn.net/?f=%2815-%203%282%29%2C%2015%20%2B%203%282%29%29%5C%5C%289%2C21%29)
Hence the lower limit is 9 and the upper limit is 21
Learn more on confidence intervals here: brainly.com/question/15712887