Solve the System by Using the Inverse of the Coefficient $$\begin{array} { l } - 4 x - y - 9 z = - 69 \\- 5 x + 7 y + 5 z = 36 \\- 9 x - 5 y + z = - 36\end{array}$$

question 215

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- $$\begin{array} { l } - 4 x - y - 9 z = - 69 \\- 5 x + 7 y + 5 z = 36 \\- 9 x - 5 y + z = - 36\end{array}$$

• A) \(\{ ( - 3,3,6 ) \}\)
• B) \(\varnothing\)
• C) \(\{ ( 3,6,3 ) \}\)
• D) \(\{ ( 3,3,6 ) \}\)

---

Definitions:

Supply Manager

A professional responsible for overseeing the acquisition of goods and services needed by an organization, ensuring efficiency and cost-effectiveness.

Supply-Chain-Support Strategies

Plans and methodologies implemented to enhance the efficiency, resilience, and effectiveness of the supply chain, ensuring timely delivery of goods and services.

Buying Organization

An entity, typically a company or government agency, that purchases goods and services for its own use or for resale.

Knowledge

Information, understanding, or skills acquired through experience or education; the theoretical or practical understanding of a subject.