Question

A rectangle’s length is three times its width, w. Its area is 243 square units. Which equation can be used to find the width of the rectangle?

a. w2 = 3(243)
b. 3w2 = 243
c. 4w2 = 243
d. 3w2 = 3(243)
please im on a timed test

Answer 1

b) 3w² = 243

Explanation:

area = L x w

L = 3w

substitute for L:

243 = 3w x w = 3w²

3w² = 243