Solve the System of Equations by the Addition Method $\left\{ \begin{array} { r } 4 x + 6 y = 76 \\- 2 x - 6 y = - 86\end{array} \right.$

question 136

Multiple Choice

Solve the system of equations by the addition method.
- $\left\{ \begin{array} { r } 4 x + 6 y = 76 \\- 2 x - 6 y = - 86\end{array} \right.$

• A) infinite number of solutions
• B) \(( 4 , - 16 )\)
• C) \(( 6 , - 16 )\)
• D) \(( - 5,16 )\)

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Definitions:

Z-statistic

A type of standard score that represents the distance in standard deviations a data point is from the mean, used in significance testing.

Two-tailed Test

A statistical test that considers both directions of a possible effect, testing for the possibility of an effect in two opposite directions.

Z-test

A statistical test used to determine whether two population means are different when the variances are known and the sample size is large.

µ = 15

Represents the mean of a population is equal to 15.