Solve the System by Substitution $$\begin{array} { r } x + 7 y = 27 \\6 x + 7 y = 57\end{array}$$

question 137

Multiple Choice

Solve the system by substitution.
- $$\begin{array} { r } x + 7 y = 27 \\6 x + 7 y = 57\end{array}$$

• A) \(\{ ( 7,2 ) \}\)
• B) \(\{ ( 6,3 ) \}\)
• C) \(\varnothing\)
• D) \(\{ ( - 3,6 ) \}\)

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Definitions:

Degrees of Freedom

The quantity of autonomous numbers or measures that can be allocated to a statistical distribution while still adhering to all restrictions.

Sample Size

The number of observations or elements drawn from a larger population for the purpose of statistical analysis.

Null Hypothesis

A hypothesis that there is no effect or no difference, and it serves as the default assumption in statistical hypothesis testing.

Correlation Coefficient

A statistical index ranging from -1 to 1 that measures the degree of association between two variables.