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18 January, 04:40

What is the area of this rectangle?11 units²18 units² 20 units² 22 units²

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  1. 18 January, 07:22
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    The length of a rectangle is 10yd less than three times the width, and the area of the rectangle is 77 yd sq. Find the dimensions of the rectangle.

    w = width ... length = 3w - 10

    A = Lw

    77 = (3w - 10) w

    3x^2 - 10w - 77 = 0

    (3w + 11) (w - 7) = 0

    w = 7 or (w = - 11/3 ... not possible)

    L = 11
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