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September 21, 2014

September 21, 2014

Posted by **So Confused** on Sunday, September 25, 2011 at 11:39pm.

- College Algebra 2 -
**Steve**, Tuesday, September 27, 2011 at 10:18amif a varies directly with b, then it means

a = k*b

If y varies jointly as x & z, then it means y = k * x * z

So, if 8 = k * 4 * 2

Then k = 1, and y = x*z

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