Use Matrices to Solve the System of Equations (If Possible) $$\left\{ \begin{array} { c } 4 x + 9 y + z = - 17 \\6 x - 6 y - 8 z = 12 \\9 x + 8 y + z = - 43\end{array} \right.$$

question 39

Multiple Choice

Use matrices to solve the system of equations (if possible) .Use Gaussian elimination with back-substitution or Gauss-Jordan elimination.​ $$\left\{ \begin{array} { c } 4 x + 9 y + z = - 17 \\6 x - 6 y - 8 z = 12 \\9 x + 8 y + z = - 43\end{array} \right.$$

• A)x = 5,y = -1,z = -6
• B)x = -5,y = -1,z = -6
• C)x = -5,y = 1,z = -6
• D)x = 1,y = 5,z = 6
• E)no solution

---

Definitions:

Learned Helplessness

An instance in which a person is overwhelmed by feelings of impotence, triggered by either a harrowing experience or repeated unsuccessful attempts.

Symbolic Loss

An emotional experience of loss that does not involve an actual death, but feels as significant as one.

Artifact Theory

The concept that differences observed in psychological research may result from artificial circumstances of the study rather than the phenomena themselves.

Body Dissatisfaction

A negative subjective evaluation of one's body weight or shape.