Use Inverses to Solve Matrix Equations
Write the Linear System

Multiple Choice

Use Inverses to Solve Matrix Equations
Write the linear system as a matrix equation in the form AX = B, where A is the coefficient matrix and B is the
constant matrix.
- $\left[ \begin{array} { l l l } 2 & 5 & 7 \\ 9 & 0 & 8 \\ 4 & 9 & 0 \end{array} \right] \left[ \begin{array} { l } x \\ y \\ z \end{array} \right] = \left[ \begin{array} { r } - 2 \\ 4 \\ 2 \end{array} \right]$

A) $2 x + 5 y + 7 z = - 2$
$9 x + 8 z = 4$
$4 x + 9 y = 2$
B) $2 x - 5 y + 7 z = - 2$
$9 x + 8 z = - 4$
$4 x + 9 y = - 2$
C) $2 x + 5 y + 7 z = - 2$
$9 x + 8 z = 4$
$4 x + 9 z = 2$
D) $2 x + 5 y + 7 z = - 2$
$9 x + 8 y = 4$
$4 x + 9 z = 2$