Solve the System by Elimination $$\begin{array} { l } 5 x + 9 y = 81 \\3 x - 3 y = - 27\end{array}$$

question 86

Multiple Choice

Solve the system by elimination.
- $$\begin{array} { l } 5 x + 9 y = 81 \\3 x - 3 y = - 27\end{array}$$

• A) \(\{ ( 0,10 ) \}\)
• B) \(\{ ( 0,9 ) \}\)
• C) \(\varnothing\)
• D) \(\{ ( - 1,10 ) \}\)

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Definitions:

Marginal Revenue

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

Economic Profit

The difference between the total revenue generated by a business and its total costs, including both explicit and implicit costs.

Market Price

The price at which a good or service is offered in the marketplace, determined by supply and demand dynamics.

Total Product

The total quantity of goods or services produced by a firm or economy at a given time.