Solve the System by Using the Substitution Method $$\left( \begin{array} { l } x = - 5 y \\2 x - 2 y = - 12\end{array} \right)$$

question 68

Multiple Choice

Solve the system by using the substitution method. $$\left( \begin{array} { l } x = - 5 y \\2 x - 2 y = - 12\end{array} \right)$$

• A) (5, -1)
• B) (1, -5)
• C) (-5, 1)
• D) infinitely many solutions
• E) no solutions

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Definitions:

Expected Frequency

The number of occurrences of an event expected in a study based on a probability model.

Sample Size

The number of observations or subjects used in a study or experiment, which represents a portion of the population being studied.

Test Statistic

A value calculated from sample data used to determine whether to reject the null hypothesis in a statistical test.

Critical Value

A threshold value in hypothesis testing that defines the boundary for rejecting the null hypothesis; it depends on the chosen significance level.