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21 January, 16:02

y is inversely proptional to x when y = 7, x = 9 a) work out an equation connecting y and x b) work out the value of y when x = 21

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  1. 21 January, 16:14
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    a) yx=63

    b) y=3

    Step-by-step explanation:

    a)

    yx=k (inverse formula)

    7 (9) = k

    63=k

    b)

    y (21) = 63

    y=63/21

    y=3
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