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19 December, 18:01

A quantity, y, varies directly as x. When y = 9, x = 4. Find y when x = 10

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  1. 19 December, 18:11
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    Y = kx

    9 = k4

    k = (9/4)

    y = (9/4) x

    when x=10,

    y = (9/4) 10

    y = 22.5
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