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Use the Elimination Method to Solve the System {x+y=8xy=12\left\{ \begin{array} { l } x + y = - 8 \\x - y = 12\end{array} \right.

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Use the elimination method to solve the system.
- {x+y=8xy=12\left\{ \begin{array} { l } x + y = - 8 \\x - y = 12\end{array} \right.


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Test Statistic

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

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Standard Deviation

A measure of the dispersion or spread of a set of numbers, indicating how much the values in the set deviate from the mean.

Test Statistic

A calculated value from sample data used to test a hypothesis within the framework of a statistical test.

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