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OpenStudy (anonymous):
y varies jointly as x and z. Write the appropriate joint-variation equation, and find y for the given values of x and z. y = 120 when x = 8 and z = 20; x = 54 and z = 7 a. ; 283.5 c. ; 283.5 b. ; 201.07 d. ; 198.3
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OpenStudy (amistre64):
y = kxz
OpenStudy (amistre64):
therefore:\[y' = \frac{y}{xz}(x'z')\]
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