Solve the System of Linear Equations Using Matrices $$\left\{ \begin{array} { l } 2 x + y = 8 \\2 x + 5 y = - 8\end{array} \right.$$

question 120

Multiple Choice

Solve the system of linear equations using matrices.
- $$\left\{ \begin{array} { l } 2 x + y = 8 \\2 x + 5 y = - 8\end{array} \right.$$

• A) \(( - 4 , - 6 )\)
• B) \(( 6 , - 4 )\)
• C) \(( - 4,6 )\)
• D) \(\varnothing\)

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Definitions:

Rank Sum

A statistical measure used to compare the distributions of two or more groups by summing ranks assigned to their observations.

Alternative Hypothesis

A statistical hypothesis that suggests a difference or effect, contrary to the null hypothesis.

Critical Value

A point on the scale of the test statistic beyond which we reject the null hypothesis, given the significance level of the test.

Significance Level

The probability of rejecting the null hypothesis when it is actually true, a threshold within hypothesis testing signaling whether an observed effect is statistically significant.