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10 September, 06:54

A notebook has a perimeter of 36 inches. It's area is 80 square inches. What are the dimensions of the notebook

__inches by___ inches

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  1. 10 September, 10:31
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    Let's call he width of the notebook w and the length l

    w*l=80

    2 (w+l) = 36

    w+l=18

    w=18-l

    (18-l) * l=80

    -l^2+18*l-80=0

    l=8 or 10

    Therefore, the notebook is 8 by 10 inches
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