The length of a rectangle is 3 more than the width. If the area is 40 square
inches, what are the dimensions?
inches, what are the dimensions?
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Step-by-step explanation:
Given:
l = w + 3
A = 40 in²
Answer:
A = l * w
40 = (w + 3) w
40 = w² + w3
40−(w² + 3w) = w² + 3w − (w² + 3w)
−w² − 3w + 40 = 0
(−w + 5)(w + 8) = 0
w = 5 or w = -8
So
w = 5
l = w + 3
= 5 + 3
l = 8
Answer:
w = 5
l = 8
hope it helps