SOLUTION: The length of a rectangle is three feet more than twice the width. The area is 90 square feet. What are the dimensions of the rectangle?

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Question 739217:
The length of a rectangle is three feet more than twice the width. The area is 90 square feet. What are the dimensions of the rectangle?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
AREA=LW
L=2W+3
90=(2W+3)W
90=2W^2+3W
2W^2+3X-90=0
(W-6)(2W+15)=0
W-6=0
W=6 ANS. FOR THE WIDTH.
L=2*6+3
L=12+3=15 ANS.
PROOF"
90=6*15
90=90