One of the steps rob used to solve an equation is shown below.

-5(3x + 7) = 10

-15x + -35 = 10

a: rob added -5 and 3x to eliminate the parentheses. this procedure is justified by the associative property.

b: rob added -5 and 3x to eliminate the parentheses. this procedure is justified by the distributive property.

c: rob multiplied 3x and 7 by -5 to eliminate the parentheses. this procedure is justified by the associative property.

d: rob multiplied 3x and 7 by -5 to eliminate the parentheses. this procedure is justified by the distributive property.

D

Step-by-step explanation:

Let's review the distributive property.

It is

a(b+c) = ab + ac

Whenever we have a sum/difference multiplied by a number upfront, we need to eliminate the parenthesis. We do it by multiplying the constant with the terms of the sum/difference inside the parenthesis, each respectively.

Looking at 2 steps, we see Rob:

From the answer choices, D is right.

answer: finding the extract measurements and knowing the points

step-by-step explanation:

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart