Solve the System by Substitution $$\begin{array} { l } y - x ^ { 2 } = - 2 x \\y = x + 4\end{array}$$

question 290

Multiple Choice

Solve the system by substitution.
- $$\begin{array} { l } y - x ^ { 2 } = - 2 x \\y = x + 4\end{array}$$

• A) \(( - 1,3 )\)
• B) \(( - 1,3 )\) and \(( 4,7 )\)
• C) \(( - 1,1 )\) and \(( 4,8 )\)
• D) \(( - 1,3 )\) and \(( 4,8 )\)

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Definitions:

Independent Variable

A variable in an experiment or mathematical model that is manipulated or changed to observe its effect on the dependent variable.

Bonferroni Criterion

A statistical adjustment method for multiple comparisons that lowers the threshold for statistical significance to control the overall type I error rate.

Substantial Bias

A significant prejudice or predisposition in a way that prevents objective consideration of an issue or situation.

T-statistic

A type of statistic used in hypothesis testing, calculated by standardizing a sample mean difference given its sample standard deviation.