Use Matrices to Solve the System of Equations (If Possible) $$\left\{ \begin{aligned}2 x + 9 y & = - 35 \\- 9 x + 2 y & = 30\end{aligned} \right.$$

question 4

Multiple Choice

Use matrices to solve the system of equations (if possible) .Use Gaussian elimination with back-substitution or Gauss-Jordan elimination. $$\left\{ \begin{aligned}2 x + 9 y & = - 35 \\- 9 x + 2 y & = 30\end{aligned} \right.$$

• A)x = -3, y = -4
• B)x = 4, y = 3
• C)x = -4, y = -3
• D)x = -3, y = 4
• E)no solution

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