Homework Help: algebra

Posted by Anonymous on Monday, December 10, 2012 at 1:06pm.

Determine the equation of combined variation. Then solve for the missing value.

x varies directly with y and inversely with z.
x = 5 when y = 10 and z = 5.
Find x when y = 20 and z = 10.

algebra - Steve, Monday, December 10, 2012 at 3:50pm
x = ky/z

5 = k(10)/(5) ==> k = 5/2

x(20,10) = (5/2)(20)/(10) = 5

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