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1 July, 14:07

The variable Z is directly proportional to X. When X is 10, Z has the value 190.

What is the value of Z when X = 13

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  1. 1 July, 14:33
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    Since z is proportion to the x

    z = a x

    190 = a 10

    a = 19

    when x = 13

    z = a x

    z = 19 * 13

    z = 247
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