Question

Gabrielle wants to tile a room with an area of 320 square feet. The width of the room is 4/5 it's length. What are the length and width of the room?

Answer 1

A = L * W
A = 320
W = 4/5L

320 = L(4/5L)
320 = 4/5L^2
320 * 5/4 = L^2
400 = L^2
sqrt 400 = L
20 = L <====length is 20 ft

W = 4/5(20)
W = 80/5
W = 16 <=== width is 16 ft

Answer 2

I hope this helps you