Solve the System of Equations Using the Addition Method $$\begin{array} { l } x - y + 2 z = 3 \\5 x + z = 0 \\x + 5 y + z = - 15\end{array}$$

question 95

Multiple Choice

Solve the system of equations using the addition method.
- $$\begin{array} { l } x - y + 2 z = 3 \\5 x + z = 0 \\x + 5 y + z = - 15\end{array}$$

• A)(0, 0, -3)
• B)(0, -3, 3)
• C)(-3, 0, 0)
• D)(0, -3, 0)

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Definitions:

MR = MC

The condition where marginal revenue equals marginal cost, often used to determine the profit-maximizing output level for a firm.

Total Revenue

The entire amount of income received by a company from its sales of goods or services before any expenses are subtracted.

Marginal Cost Curve

A graphical representation showing how the cost of producing one more unit of a good varies as the volume of production increases.

Industry Supply Curve

A graphical representation showing the total quantity of a good or service that businesses in an industry are willing to sell at various price levels.