Use Matrices to Solve the System $$\left\{ \begin{array} { r r } 2 x - y - 9 z & = - 33 \\- 8 x - 3 z & = - 71 \\2 y + z & = 9\end{array} \right.$$

question 15

Multiple Choice

Use matrices to solve the system.
- $$\left\{ \begin{array} { r r } 2 x - y - 9 z & = - 33 \\- 8 x - 3 z & = - 71 \\2 y + z & = 9\end{array} \right.$$

• A) \(( 7,5,2 )\)
• B) \(\varnothing\)
• C) \(( 7,2,5 )\)
• D) \(( - 7,2,14 )\)

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