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Which set of equations can be solved using the matrix equation:this is an online homework assignment I need help on for pre calculus

Which set of equations can be solved using the matrix equation:this is an online homework-example-1
User AlexanderB
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1 Answer

7 votes

The given matrix equation is:


\begin{pmatrix}4 & -1 \\ -2 & -1\end{pmatrix}\begin{pmatrix}x \\ y\end{pmatrix}=\begin{pmatrix}-5 \\ -3\end{pmatrix}

To get the required equations, we will have to carry out the matrix multiplication, thus we have:


\begin{gathered} (4* x)+(-1* y)=-5 \\ (-2* x)+(-1* y)=-3 \end{gathered}
\begin{gathered} 4x-y=-5 \\ -2x-y=-3 \end{gathered}

Hence, the correct option is option D

User Rodolfo Grave
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