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26 July, 17:42

If y varies inversely as the square of x and y=4 when x=5, find y when x is 2

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  1. 26 July, 17:54
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    need to kind K

    Y=k x 1/x^2 = k/x^2

    Find K when y=4 & x=5

    Y=k/x^2 =

    4=k/5^2=

    4=k/25

    K=4*25 = 100

    When x = 2

    Y=100/2^2

    Y=100/4

    Y=25
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