PLEASE HELP!!!! Marty knows that his living room requires 72 square feet of carpet but is unsure of the dimensions. If he measure the length to be 9 feet, what must its width be? Write only the number rounded to the nearest foot.

Question

PLEASE HELP!!!! Marty knows that his living room requires 72 square feet of carpet but is unsure of the dimensions.  If he measure the length to be 9 feet, what must its width be?  Write only the number rounded to the nearest foot.

directrix · Answer

Assumptions:  that the living room floor is rectangular and that the carpet is to cover the entire living room floor.

A = l*w.
72 = 9*w
Divide both sides by 9 to solve for the width.