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28 December, 02:53

The value of y varies directly with x. If y=100 when x=4, what is the value of y when x=8?

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  1. 28 December, 03:17
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    200

    Step-by-step explanation:

    If y varies directly with x, this means that, for a value k, k*x=y. Therefore, if k*4=100, and k stays the same, k*8=k*4*2=100*2=200
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