Use Cramer's Rule to Solve the System of Equations $$\begin{array} { l } 8 x - 5 y = 25 \\2 x + 2 y = - 10\end{array}$$

question 241

Multiple Choice

Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.
- $$\begin{array} { l } 8 x - 5 y = 25 \\2 x + 2 y = - 10\end{array}$$

• A) \(\{ ( 0 , - 4 ) \}\)
• B) \(\{ ( 0 , - 5 ) \}\)
• C) Cramer's rule does not apply since \(D = 0 ; \varnothing\)
• D) \(\{ ( - 1 , - 4 ) \}\)

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Definitions:

Contribution Margin

The amount by which sales revenue exceeds variable costs. It represents the portion of sales that helps to cover fixed costs.

Contribution Format

A type of income statement where costs are classified as variable or fixed, and the contribution margin is computed by subtracting total variable costs from sales.

Contribution Margin

The difference between total sales revenue and total variable costs, used to cover fixed costs and generate profit.

Contribution Format

An income statement format that separates fixed and variable costs, facilitating analysis of the impact of sales volume on profit.