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6 September, 14:47

A rectangle has length of 9x + 4 and a width of x - 5. find the perimeter and the area of the rectangle.

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  1. 6 September, 15:31
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    Perimeter = 2 width + 2 length

    = 2 (x-5) + 2 (9x+4)

    = 2x-10+18x+8

    = 20x-2

    the area of the rectangle = width * length

    = (x-5) * (9x+4)

    = 9x^2 - 41x - 20
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