SOLUTION: The perimeter of a rectangle is 240 feet. Express the area of the rectangle in terms of its width.

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Question 545532: The perimeter of a rectangle is 240 feet. Express the area of the rectangle in terms of its width.
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
If l is the length of the longest side of the rectangle, and w is the width (the length of the shortest side, perimeter (in feet) is
perimeter=2l%2B2w=240 <--> l%2Bw=120 <--> l=120-w
The area of the rectangle will be
area=l%2Aw=%28120-w%29%2Aw=-w%5E2%2B120w
area=-w%5E2%2B120w is the answer.