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September 22, 2014

September 22, 2014

Posted by **True** on Sunday, July 22, 2012 at 6:33pm.

-1x + 7y + 2z = 6

2x + 1y + kz = -11

3x - 6y - 2z = -25

A.5

B.0

C.-2

D.-8

- mathematics please help! -
**Damon**, Sunday, July 22, 2012 at 6:46pmdeterminant = 2+21k-24-6-6k+28

If the determinant is zero, we can not solve for the variables

0 +15 k = 0

k = 0

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