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OpenStudy (anonymous):
A rectangular family photo is 4 in. longer than it is wide. The area of the photo is 140in^2. Find the dimensions of the photograph. I use the formula 2l+2w=A but i got a wrong answer. The answer is 14 length 10 width but i need the solution :)
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OpenStudy (anonymous):
|dw:1335417932055:dw| Area = (x + 4)x = x^2 + 4x 140 = x^2 + 4x solve for x
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