Answered

y varies directly with the square of x. If y=40 when x=4, find y when x = 7 *

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Answer:

245/2 or 122.5

Step-by-step explanation:

[tex]y=kx^{2}\\40=k(4)^{2}\\k=\frac{5}{2}\\\\y=\frac{5}{2}(7)^{2}\\y=\frac{245}{2}[/tex]

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