Solve the System of Linear Equations Using Matrices $$\left\{ \begin{array} { r r } 2 x - 8 y - z = & - 20 \\x - 7 y + 6 z = & 17 \\6 x + y + z = & 64\end{array} \right.$$

question 19

Multiple Choice

Solve the system of linear equations using matrices.
- $$\left\{ \begin{array} { r r } 2 x - 8 y - z = & - 20 \\x - 7 y + 6 z = & 17 \\6 x + y + z = & 64\end{array} \right.$$

• A) \(( 9,6,4 )\)
• B) \(( - 9,4,18 )\)
• C) \(( 9,4,6 )\)
• D) \(\varnothing\)

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Food Chain

A sequence of organisms each dependent on the next as a source of food, illustrating the flow of energy and nutrients from one organism to another.

Kilocalories

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Aquifers

Underground layers of water-bearing permeable rock or materials through which groundwater can move and be stored.