Solve the System of Equations by Either the Addition Method $\left\{ \begin{array} { l } 2 x + 3 y = 18 \\3 x - 4 y = - 42.7\end{array} \right.$

question 54

Multiple Choice

Solve the system of equations by either the addition method or the substitution method.
- $\left\{ \begin{array} { l } 2 x + 3 y = 18 \\3 x - 4 y = - 42.7\end{array} \right.$

• A) \(( - 3.3,8.2 )\)
• B) no solution
• C) infinite number of solutions
• D) \(( 8.2 , - 3.3 )\)

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Definitions:

Marginal Revenue

The additional income earned from selling one more unit of a good or service.

Marginal Cost

The cost of producing one additional unit of a product or service, crucial for economic decision-making and pricing strategies.

Marginal Revenue

Additional earnings received from marketing one more unit of a good or service.

Perfect Competitor

A theoretical market structure where many firms sell identical products, entry and exit are free, and no single buyer or seller can influence the market price.