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25 May, 09:20

The area of a room os 396 feet. the length is (x+7) feet and the width is (x+3) feet. find the dimensions of the room

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  1. 25 May, 12:44
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    I will assume that this room is rectangular. If so, its area is determined by

    l • w = A

    The length is (x + 7), and the width is (x + 3). We also know the area is 396 square feet. We can plug in and solve:

    (x + 7) • (x + 3) = 396

    x^2 + 3x + 7x + 21 = 396

    x^2 + 10x + 21 = 396

    x^2 + 10x - 375 = 0

    x = 15
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