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) \(\{ ( 3,3,6 ) \}\)

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Definitions:

Net Accounts Receivable

The amount of money owed by customers for goods or services that is expected to be collectible, after accounting for allowances for doubtful accounts.

Net Cash Sales

The amount of cash generated from sales transactions, after deducting returns, allowances, and discounts.

Accounts Receivable Turnover

A financial ratio that measures how efficiently a company collects revenue from its credit customers by comparing net credit sales to the average accounts receivable.

Inventory Turnover

A measure of how frequently a company sells and replaces its stock of goods during a certain period. It indicates the efficiency of inventory management.