Use Cramer's Rule, If Possible, to Solve the System of Linear

question 18

Multiple Choice

Use Cramer's Rule, if possible, to solve the system of linear equations.
- $$\left\{ \begin{array} { l } x + y = 7 \\6 x + 6 y = 42\end{array} \right.$$

• A) \(( 2,5 )\)
• B) \(( 0,0 )\)
• C) \(\{ ( x , y ) \mid x + y = 7 \}\)
• D) \(\varnothing\)

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Definitions:

Tax

A mandatory monetary payment or different kind of tax levied on taxpayers by government entities to support government expenses and various public services.

Consumer Surplus

The difference between the total amount consumers are willing and able to pay for a good or service and the total amount they actually do pay.

Producer Surplus

The discrepancy between the price at which producers are inclined to sell a product and the actual price they get, frequently viewed as an indicator of the well-being of producers.

Tax

A mandatory monetary fee or a different kind of tax placed on an individual or entity by a government agency.