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OpenStudy (anonymous):
Variable y varies directly with x2, and y = 72 when x = 6. What is the value of y when x = 4? y=
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OpenStudy (anonymous):
\[=\frac{ 72 }{ 6 }\]\[=12\]Therefore,y is 12 times bigger than x
OpenStudy (anonymous):
\[y=12\times4\]\[y=48\]
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