View Full Version : Joint Variation: what is "the square of z"?

Reporter529

05-24-2006, 06:15 PM

y varies jointly with x and the square of z. One set of values is y=375 when x=3 and z=25. Find y when x=8 and z=6

what's the square of z?? z^2 or the square root of z?

stapel

05-24-2006, 07:45 PM

"The square of" means "squared". "The square root of" means "the square root of".

Eliz.

skeeter

05-24-2006, 08:26 PM

y varies jointly with x and the square of z

y = kxz<sup>2</sup>, where k is the konstant of variation.

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