SOLUTION: y varies jointly as x and z and inversely as w, and y = 3/2 when x = 2, z = 2, and w = 4. Find the equation of variation for the given situation.

Question 312848: y varies jointly as x and z and inversely as w, and y = 3/2 when x = 2, z = 2, and w = 4. Find the equation of variation for the given situation.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

"jointly" as x and z -- x and z go in the numerator

"inversely" as w -- w goes in the denominator

Throw in a constant of proportionality, generally a k will do, and you have it:

Plug in what you know for the initial conditions:

Which is to say:

and finally:

John

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