SOLUTION: y varies jointly as x and z. y=72 when x=3 and z=6. Find y when x=7 and z=4 y=

Algebra ->  Sequences-and-series -> SOLUTION: y varies jointly as x and z. y=72 when x=3 and z=6. Find y when x=7 and z=4 y=      Log On


   

Question 860299: y varies jointly as x and z. y=72 when x=3 and z=6. Find y when x=7 and z=4
y=
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
y varies jointly as x and z.
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y = k*x*z
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Solve for "k" using y=72 when x=3 and z=6.
72 = k*3*6
k = 4
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Equation:
y = 4*x*z
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Find y when x=7 and z=4
y= 4*7*4
y = 112
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Cheers,
Stan H.
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