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1 February, 18:21

A rectangle has an area of 72 square units. The width of the rectangle is 9 units. The length of the rectangle is 2x + 4. What is the rectangle's length? A) 6, B) 7, C) 8 D) 9

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  1. 1 February, 19:46
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    A = L•W

    72 = 9 • (2x + 4)

    72 = 9 (2x + 4)

    72 = 18x + 36

    72 - 36 = 18x + 36 - 36

    36 = 18x

    36/18 = 18x/18

    2 = X

    L = 2x + 4

    L = 2 (2) + 4

    L = 4 + 4

    L = 8.

    The rectangle's length is C. 8 units.
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