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16 December, 21:48

The length of a rectangle is five feet less than

its width. If the area of the rectangle is 84

square feet, find its dimensions.

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Answers (1)
  1. 17 December, 00:58
    0
    Length is w-5

    Area = length x width

    84 = (w-5) w

    84 = w^2 - 5w

    0 = w^2 - 5w - 84

    0 = (w - 12) (w + 7)

    w + 7 = 0 leads to negative measures.

    w-12=0 - --> w = 12

    width is 12, length is 5 less, or 7
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