Use a Matrix Approach to Solve the System $$\left( \begin{array} { c } x - 3 y - z = 3 \\5 x + y - 6 z = 5 \\- 4 x + 5 y + 5 z = 11\end{array} \right)$$

question 25

Multiple Choice

Use a matrix approach to solve the system. $$\left( \begin{array} { c } x - 3 y - z = 3 \\5 x + y - 6 z = 5 \\- 4 x + 5 y + 5 z = 11\end{array} \right)$$

• A) (-3, -1, 2)
• B) (-4, -1, 5)
• C) (-3, -3, 5)
• D) (-4, -3, 2)
• E) inconsistent

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Definitions:

Real Numbers

All the numbers on the number line, including rational and irrational numbers, but not imaginary numbers.

Radical Expression

An expression that includes a radical symbol, which indicates the root of a number.

Simplify

The process of making an expression or equation easier to work with, by reducing it to its most basic form.

Absolute Value

The distance of a number from zero on the real number line, disregarding whether it is positive or negative.