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24 February, 21:29

y varies directly as the square of x. When x = 5, y = 100. Find y when x = 6.

y = 105

y = 120

y = 144

y = 150

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  1. 24 February, 21:53
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    Let be x=5, so y=100 = 5² * 4=5²*2²=100

    so if x=6, so y=6²*2²=36*4=144

    the answer is y = 144
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