Use a Graphing Calculator to Express Solutions with Approximations to the Nearest

question 458

Multiple Choice

Use a graphing calculator to Express solutions with approximations to the nearest thousandth.
- $$\begin{array} { l } - 2 x + 8 y - z = - 15 \\x - 2 y + 7 z = 68 \\- 4 x + y + z = - 18\end{array}$$

• A) \(\varnothing\)
• B) \(\{ ( - 7,1,14 ) \}\)
• C) \(\{ ( 7,9,1 ) \}\)
• D) \(\{ ( 7,1,9 ) \}\)

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