Solve the System of Equations by Using the Inverse of the Coefficient

question 104

Multiple Choice

Solve the system of equations by using the inverse of the coefficient matrix.
- $\begin{array}{l}4 x+8 y-z=45 \\x+5 y+7 z=99 \\-7 x+y+z=-19\end{array}$

• A) \( (5,9,7) \)
• B) \( (6,7,7) \)
• C) \( (5,-9,-7) \)
• D) \( (9,7,9) \)

---

Definitions:

Plasmodium Vivax

A species of protozoan parasite responsible for a type of malaria, characterized by recurring fevers and anemia.

Life Cycle

The series of stages through which a living organism passes from the start of its life until it reproduces.

Malaria

Disease caused by the protozoan Plasmodium vivax; transmitted by the Anopheles mosquito.

Fungi

A kingdom of organisms that includes molds, yeasts, and mushrooms, which live by decomposing and absorbing the organic material in which they grow.