Use the Matrix Capabilities of a Graphing Utility to Find

question 47

Multiple Choice

Use the matrix capabilities of a graphing utility to find AB,if possible. $$A = \left[ \begin{array} { c c } 4 & - 5 \\- 4 & 2 \\- 3 & - 9 \\- 5 & 8\end{array} \right] , B = \left[ \begin{array} { c c c c } - 1 & - 9 & 8 & - 7 \\- 9 & - 1 & - 1 & 9\end{array} \right]$$

• A) \[\left[ \begin{array} { c }
• 41 \\
• 34 \\
• - 32 \\
• 107
• \end{array} \right]\]
• B) \[\left[ \begin{array} { c c c c }
• 41 & - 31 & 37 & - 73 \\
• - 14 & 34 & - 34 & 46 \\
• 84 & 36 & - 15 & - 60 \\
• - 67 & 37 & - 48 & 107
• \end{array} \right]\]
• C) \[\left[ \begin{array} { c c c c }
• - 49 & - 41 & 27 & 17 \\
• 22 & 38 & - 30 & 10 \\
• - 78 & 18 & - 33 & 102 \\
• 77 & 53 & - 32 & - 37
• \end{array} \right]\]
• D)not possible
• E) \[\left[ \begin{array} { c c c c }
• 41 & - 14 & 84 & - 67 \\
• - 31 & 34 & 36 & 37 \\
• 37 & - 34 & - 15 & - 48 \\
• - 73 & 46 & - 60 & 107
• \end{array} \right]\]

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