View Full Version : Joint Variation: what is "the square of z"?
05-24-2006, 07:15 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?
05-24-2006, 08:45 PM
"The square of" means "squared". "The square root of" means "the square root of".
05-24-2006, 09:26 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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