Algebra Archive: Questions from August 20, 2022
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Solve for \( x \) and \( y \). \[ \left[\begin{array}{rr} x & -5 \\ 9 & 25 \end{array}\right]=\left[\begin{array}{rr} -2 & -5 \\ 9 & y \end{array}\right] \]3 answers -
If possible, find \( A+B, A-B, 5 A \), and \( 5 A-2 B \). (If not possible, enter IMPOSSIBLE.) \[ A=\left[\begin{array}{rr} -1 & -1 \\ 1 & 2 \end{array}\right], \quad B=\left[\begin{array}{rr} 1 & -13 answers -
If possible, find \( A+B, A-B, 5 A \), and \( 5 A-2 B \). (If not possible, enter IMPOSSIBLE.) \[ A=\left[\begin{array}{ll} 4 & 1 \\ 1 & 4 \end{array}\right], B=\left[\begin{array}{rr} -2 & -2 \\ 3 &3 answers