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19 August, 04:54

The variable Z is directly proportional to X. When X is 3, Z has the value 54. Wha is the value of Z when X = 12

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  1. 19 August, 08:09
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    The variable Z is directly proportional to X

    Z = kX (Where k is the constant of proportionality)

    To find k

    54 = k3

    k = 54/3

    k = 18

    now find new Z

    Z = 18X

    Z = 18 (12)

    Z = 216
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