Solve the System of Equations by Using Substitution $$\left\{ \begin{array} { l } 3 x + y = 13 \\2 x + 9 y = - 8\end{array} \right.$$

question 106

Multiple Choice

Solve the system of equations by using substitution.
- $$\left\{ \begin{array} { l } 3 x + y = 13 \\2 x + 9 y = - 8\end{array} \right.$$

• A) x = 5, y = 2
• B) x = -5, y = -2
• C) x = -5, y = 2
• D) x = 5, y = -2

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Definitions:

Manufacturing

The process of producing goods and products in large quantities, often using machinery and in factories.

Contribution Margin

The amount by which sales revenue exceeds variable costs, indicating the contributing profit before fixed costs are deducted.

Depreciation

The process of allocating the cost of a tangible asset over its useful life, reflecting the decrease in value over time.

Markdowns

Reductions in the retail prices of goods, typically to stimulate sales or clear inventory.