Solve the System of Equations $$\left\{ \begin{aligned}5 x + 3 y & = - 7 \\x & = - 2 y\end{aligned} \right.$$

question 65

Multiple Choice

Solve the system of equations.
- $$\left\{ \begin{aligned}5 x + 3 y & = - 7 \\x & = - 2 y\end{aligned} \right.$$

• A) \(( 1 , - 2 )\)
• B) \(( - 2,1 )\)
• C) \(\{ ( x , y ) \mid 5 x + 3 y = - 7 \}\)
• D) \(\varnothing\)

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Definitions:

Statistical Significance

A determination that a relationship between variables is caused by something other than chance at a specified confidence level.

True Proportion

The actual ratio or fraction of a population that possesses a particular attribute or characteristic.

Random Sample

A subset of individuals chosen from a larger set where each individual has an equal chance of being selected.

Large-Sample Z

A statistical test used to determine if two population means are different, applicable when the sample size is large.