Find the Inverse Matrix of A $\mathrm { A } ^ { - 1 } = \left[ \begin{array} { r r } 3 & - 7 \\ - 2 & 5 \end{array} \right]$

question 110

Multiple Choice

Find the inverse matrix of A.
-If $\mathrm { A } ^ { - 1 } = \left[ \begin{array} { r r } 3 & - 7 \\ - 2 & 5 \end{array} \right]$ , solve $\mathrm { AX } = \left[ \begin{array} { l } 5 \\ 10 \end{array} \right]$ for $\mathrm { X }$ .

• A) \(X = \left[ \begin{array} { l } - 110 \\ - 120 \end{array} \right]\)
• B) \(X = \left[ \begin{array} { l } - 55 \\ 40 \end{array} \right]\)
• C) \(X = \left[ \begin{array} { l } 55 \\ - 60 \end{array} \right]\)
• D) \(X = \left[ \begin{array} { l } - 20 \\ 60 \end{array} \right]\)

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