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27 August, 10:56

The distance a spring stretches varies directly as the amount of weight that is hanging on it. A weight of 2.5 pounds stretches a spring 18 inches. Find the stretch of the spring when a weight of 6.4 pounds is hanging on it.

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  1. 27 August, 11:09
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    2.5 / 18 = 6.4 / x

    cross multiply

    (2.5) (x) = (18) (6.4)

    2.5x = 115.2

    x = 115.2 / 2.5

    x = 46.08 inches
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