Homework Help: math

Posted by Jake on Monday, October 3, 2011 at 6:31am.

Given the formula X=x to the power of 2 + y to the power of 2 can you find X if x=9,y=negative 4,z=1/2?

math - Reiny, Monday, October 3, 2011 at 10:07am
I see
X = x^2 + y^2 , and x=9 , y=-4 and z = 1/2
X = 81+16 = 97

where does z enter the picture?
math - Jake, Tuesday, October 4, 2011 at 4:42pm
I Don't know, it was our teacher who typed the questions.

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