Use a Graphing Calculator to Find the Matrix Product And/or $A B+A C$

question 10

Multiple Choice

Use a graphing calculator to find the matrix product and/or sum.
-Find $A B+A C$ .
$$A=\left[\begin{array}{rrrr}17 & -14 & 18 & 18 \\30 & 5 & -7 & 2 \\11 & 3 & -2 & 1 \\-5 & 32 & 5 & 10\end{array}\right] B=\left[\begin{array}{rrr}5 & 17 & 12 \\7 & 6 & -4 \\-12 & -9 & 15 \\3 & -2 & -14\end{array}\right] C=\left[\begin{array}{rrr}7 & -4 & 3 \\-16 & -19 & 20 \\-6 & -15 & -8 \\5 & 16 & 17\end{array}\right]$$

• A) \( \left[\begin{array}{rrr}150 & 3 & 281 \\ 457 & 521 & 487 \\ 97 & 206 & 88 \\ 174 & -461 & 502\end{array}\right] \)
• B) \( \left[\begin{array}{rrr}-168 & 3 & 281 \\ 259 & 580 & 297 \\ 97 & 206 & 88 \\ 174 & 58 & -28\end{array}\right] \)
• C)
• \( \left[\begin{array}{rrr}150 & 223 & 211 \\ 457 & 521 & 487 \\ 149 & 166 & 202 \\ -358 & -461 & 502\end{array}\right] \)
• D) Does not exist

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