​Use the Matrix Capabilities of a Graphing Utility to Solve $$\left\{ \begin{array} { c c c } 15 x - 5 y & = & 3 \\10 x + 10 y & = & 6 \\20 z & = & - 12\end{array} \right.$$

question 40

Multiple Choice

​Use the matrix capabilities of a graphing utility to solve the following system of linear equations: $$\left\{ \begin{array} { c c c } 15 x - 5 y & = & 3 \\10 x + 10 y & = & 6 \\20 z & = & - 12\end{array} \right.$$

• A)​ \[\left[ \begin{array} { l }
• x \\
• y \\
• z
• \end{array} \right] = \left[ \begin{array} { c }
• \frac { - 3 } { 10 } \\\\
• \frac { 9 } { 10 } \\\\
• \frac { - 3 } { 5 }
• \end{array} \right]\]
• B)​ \[\left[ \begin{array} { l }
• x \\
• y \\
• z
• \end{array} \right] = \left[ \begin{array} { c }
• \frac { 9 } { 10 } \\
• 0 \\
• \frac { - 3 } { 5 }
• \end{array} \right]\]
• C)​ \[\left[ \begin{array} { l }
• x \\
• y \\
• z
• \end{array} \right] = \left[ \begin{array} { c }
• \frac { - 3 } { 10 } \\\\
• \frac { 3 } { 10 } \\\\
• \frac { - 3 } { 5 }
• \end{array} \right]\]
• D)​ \[\left[ \begin{array} { l }
• x \\
• y \\
• z
• \end{array} \right] = \left[ \begin{array} { c }
• \frac { 3 } { 10 } \\\\
• \frac { - 3 } { 10 } \\\\
• 0
• \end{array} \right]\]
• E)​ \[\left[ \begin{array} { l }
• x \\
• y \\
• z
• \end{array} \right] = \left[ \begin{array} { c }
• \frac { 3 } { 10 } \\\\
• \frac { 3 } { 10 } \\\\
• \frac { - 3 } { 5 }
• \end{array} \right]\]

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