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18 January, 21:50

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. If the scrapbook is 45 cm wide, how long is the scrapbook?

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  1. 19 January, 00:24
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    The length is 32 cm

    Step-by-step explanation:

    The scrapbook is rectangular so the perimeter is 2 (l+w)

    P = 2 (l+w)

    We know the perimeter is 154 and the width is 45

    Substituting these values into the equation

    154 = 2 (l+45)

    Divide each side by 2

    154/2 = 2/2 (l+45)

    77 = l+45

    Subtract 45 from each side

    77-45 = l+45-45

    32 = l

    The length is 32 cm
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