Use Cramer's Rule to Solve (If Possible) the System of Equations

question 158

Multiple Choice

Use Cramer's Rule to solve (if possible) the system of equations. $$\left\{ \begin{array} { l } x + 2 y + 3 z = - 5 \\- 2 x + y - z = 10 \\3 x - 3 y + 2 z = - 21\end{array} \right.$$

• A)(-2, 3, -3)
• B)(7, -3, 2)
• C)(2, 3, -3)
• D)(2, -3, -3)
• E)(-2, -3, -3)

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Definitions:

Fixed Cost

Costs that do not vary with the level of output or production in the short term, such as rent, salaries, and insurance premiums.

Lawn-mowing

The process of cutting grass to a uniform length, typically performed as a maintenance activity for aesthetic and health reasons in gardens and lawns.

Variable Costs

Expenditures that change in direct correlation with the amount of output or production.

Profit-maximizing Output

The level of production at which a firm can achieve the highest possible profit, given its cost structure and the price of its products or services.