SOLUTION: Please help me. I really need the answer. The length of the longer side of a rectangle is 7 more feet than the length of the shorter side. Find the length of the shorter side tha

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Question 128540: Please help me. I really need the answer.
The length of the longer side of a rectangle is 7 more feet than the length of the shorter side. Find the length of the shorter side that will generate an area of at least 18 ft.

Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!
X(X+7)>=18
X^2+7X-18>=0
(X+9)(X-2)>=0
X-2=0
X=2 ANSWER FOR THE SHORTER SIDE.
PROOF:
2(2+7)>=18
2*9>=18
18>=18

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