Mrs. sparks is a 9th grade algebra 1 teacher. she teaches three algebra 1 courses and all the classes recently took a chapter exam. below are the scores.

class 1 45 68 77 90 90 95 100 100 86 90 50 55
class 2 64 65 70 40 100 87 84 88 90 90 95 80
class 3 70 75 75 90 100 80 55 65 76 80 88 99

a. find the mean, median, mode and range of class 1.
b. find the mean, median, mode and range of class 2.
c. find the mean, median, mode and range of class 3.
d. find the standard deviation of class 1.
e. find the standard deviation of class 2.
f. find the standard deviation of class 3.
g. which class had a higher standard deviation and what does that mean?
h. in your opinion, which class did better on the exam? explain your answer.

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

answer:

your answer is: c. 196 7/8 in^3.

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

step-by-step explanation: