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20 May, 01:50

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

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  1. 20 May, 02:13
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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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