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Questions: Algebra BusinessCalculus
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Evaluate the expression \(\displaystyle 2 A - 5 B\)
\begin{equation*} A = \left[\begin{matrix}-1 & 2 & -9\\8 & -4 & 2\end{matrix}\right], \text{ and } \quad\quad B = \left[\begin{matrix}1 & -6 & 8\\-2 & 1 & -8\end{matrix}\right] \end{equation*}
The sum is \(\displaystyle \left[\begin{matrix}-7 & 34 & -58\\26 & -13 & 44\end{matrix}\right]\).
\begin{question}Evaluate the expression $2 A - 5 B$\newline\begin{equation*} A = \left[\begin{matrix}-1 & 2 & -9\\8 & -4 & 2\end{matrix}\right], \text{ and } \quad\quad B = \left[\begin{matrix}1 & -6 & 8\\-2 & 1 & -8\end{matrix}\right] \end{equation*}
\soln{9cm}{The sum is $\left[\begin{matrix}-7 & 34 & -58\\26 & -13 & 44\end{matrix}\right]$. }
\end{question}
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\begin{document}\begin{question}(10pts) The question goes here!
\soln{9cm}{The solution goes here.}
\end{question}\end{document}<p> <p>Evaluate the expression <img class="equation_image" title=" \displaystyle 2 A - 5 B " src="/equation_images/%20%5Cdisplaystyle%202%20A%20-%205%20B%20" alt="LaTeX: \displaystyle 2 A - 5 B " data-equation-content=" \displaystyle 2 A - 5 B " /> <br> <img class="equation_image" title=" A = \left[\begin{matrix}-1 & 2 & -9\\8 & -4 & 2\end{matrix}\right], \text{ and } \quad\quad B = \left[\begin{matrix}1 & -6 & 8\\-2 & 1 & -8\end{matrix}\right] " src="/equation_images/%20%20A%20%3D%20%5Cleft%5B%5Cbegin%7Bmatrix%7D-1%20%26%202%20%26%20-9%5C%5C8%20%26%20-4%20%26%202%5Cend%7Bmatrix%7D%5Cright%5D%2C%20%5Ctext%7B%20and%20%7D%20%5Cquad%5Cquad%20B%20%3D%20%5Cleft%5B%5Cbegin%7Bmatrix%7D1%20%26%20-6%20%26%208%5C%5C-2%20%26%201%20%26%20-8%5Cend%7Bmatrix%7D%5Cright%5D%20%20" alt="LaTeX: A = \left[\begin{matrix}-1 & 2 & -9\\8 & -4 & 2\end{matrix}\right], \text{ and } \quad\quad B = \left[\begin{matrix}1 & -6 & 8\\-2 & 1 & -8\end{matrix}\right] " data-equation-content=" A = \left[\begin{matrix}-1 & 2 & -9\\8 & -4 & 2\end{matrix}\right], \text{ and } \quad\quad B = \left[\begin{matrix}1 & -6 & 8\\-2 & 1 & -8\end{matrix}\right] " /> </p> </p><p> <p>The sum is <img class="equation_image" title=" \displaystyle \left[\begin{matrix}-7 & 34 & -58\\26 & -13 & 44\end{matrix}\right] " src="/equation_images/%20%5Cdisplaystyle%20%5Cleft%5B%5Cbegin%7Bmatrix%7D-7%20%26%2034%20%26%20-58%5C%5C26%20%26%20-13%20%26%2044%5Cend%7Bmatrix%7D%5Cright%5D%20" alt="LaTeX: \displaystyle \left[\begin{matrix}-7 & 34 & -58\\26 & -13 & 44\end{matrix}\right] " data-equation-content=" \displaystyle \left[\begin{matrix}-7 & 34 & -58\\26 & -13 & 44\end{matrix}\right] " /> . </p> </p>