Solve the System of Equations by the Substitution Method $$\left\{ \begin{array} { r r } x + 6 y & = 7 \\- 4 x + 7 y & = - 28\end{array} \right.$$

question 86

Multiple Choice

Solve the system of equations by the substitution method.
- $$\left\{ \begin{array} { r r } x + 6 y & = 7 \\- 4 x + 7 y & = - 28\end{array} \right.$$

• A) \(( - 7 , - 1 )\)
• B) \(( 7,0 )\)
• C) \(( 8,7 )\)
• D) \(\varnothing\)

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Definitions:

Test Statistic

A value calculated from sample data during a hypothesis test used to determine the likelihood of the null hypothesis being true.

Critical Value(s)

The thresholds in statistical hypothesis testing that define the boundary or boundaries for rejecting the null hypothesis.

P-value

The odds of seeing results from a test that are at least as extreme as the observed results, with the assumption that the null hypothesis is accurate.

Sampled Populations

Populations from which samples are drawn for the purpose of conducting research or statistical analysis.