SOLUTION: z is jointly proportional to x^2 and y^2 . If z = 470 when x = 8 and y = 2 , find z when x = 7 and y = 3 . (Round off your answer to the nearest hundredth.)

Algebra ->  Proportions  -> Lessons -> SOLUTION: z is jointly proportional to x^2 and y^2 . If z = 470 when x = 8 and y = 2 , find z when x = 7 and y = 3 . (Round off your answer to the nearest hundredth.)       Log On


   

Question 1059522: z is jointly proportional to x^2 and y^2 . If z = 470 when x = 8 and y = 2 , find z when x = 7 and y = 3 . (Round off your answer to the nearest hundredth.)
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




Using , , and , solve for .

Then once you know , that value works for any values of and . Just do the arithmetic.

John

My calculator said it, I believe it, that settles it