Use Cramer's Rule to Solve the Linear System $$\left\{ \begin{array} { c } 2 x + 5 y = 21 \\2 x + y = 1\end{array} \right.$$

question 141

Multiple Choice

Use Cramer's rule to solve the linear system.
- $$\left\{ \begin{array} { c } 2 x + 5 y = 21 \\2 x + y = 1\end{array} \right.$$

• A) x = 5, y = -2
• B) x = -5, y = -2
• C) x = -2, y = 5
• D) x = 2, y = -5

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Definitions:

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The number of independent pieces of information in a statistical calculation, often equal to the sample size minus the number of parameters estimated.

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Chi-square

A statistical test used to determine if there is a significant association between two categorical variables.