halphalph halphalph

29-05-2020
Mathematics

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Y varies directly with the square x. If y= 27 when x = 3, find y when x = -4

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princedavidanicet6 princedavidanicet6

29-05-2020

Answer:

y~x²

y/x²= k

27/3²=3

therefore k= 3

y/ -4 = k

y / -4= 3

3y = -4

y = -4

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