Solve the System $\left(\begin{array}{llll}x&-&2 y&+&z & =&13 \\5 x&+&4 y&-&4 z & =&5 \\-2 x&-&5 y&+&4 z & =&13\end{array}\right)$

question 31

Multiple Choice

Solve the system. $\left(\begin{array}{llll}x&-&2 y&+&z & =&13 \\5 x&+&4 y&-&4 z & =&5 \\-2 x&-&5 y&+&4 z & =&13\end{array}\right)$

• A) x = 5, y = -3, z = 2
• B) x = 3, y = -1, z = 5
• C) x = 5, y = 0, z = 4
• D) x = 5, y = 2, z = 5

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Periods of ten years, often used as a measure of time to note changes, trends, or developments.

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