Match each equation on the left to the mathematical property it uses on the right. (7 + 3) + 2 = 2 + (7 + 3)
commutative property of addition
3(2x + 4) = 6x + 12
commutative property of multiplicatio
(9.x) · 3 = 9. (x. 3)
associative property of addition
(8.x. 2) = (8.2.x)
associative property of multiplication
(4 + 5) + 1 = 4 + (5 + 1)
distributive property

1) commutative  property of addition

2) distributive property

3) commutative property of multiplication

4)associative property of addition

Step-by-step explanation:

You are probably done but im 100% sure this is it

goog may have it for you

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)