Solve by Using the Substitution Method $$\begin{array} { r } x - 2 y = 16 \\- 8 x - 8 y = 16\end{array}$$

question 55

Multiple Choice

Solve by using the substitution method. $$\begin{array} { r } x - 2 y = 16 \\- 8 x - 8 y = 16\end{array}$$

• A) (14, -1)
• B) (12, -14)
• C) (4, -6)
• D) Infinitely many solutions; \(\left\{ ( x , y ) \mid y = \frac { 1 } { 2 } x - 8 \right\}\) ; dependent system

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Definitions:

Correlations

Statistical measures that describe the extent to which two or more variables move together, without necessarily implying causation.

Internal Validity

The degree to which an experimental design is capable of eliminating confounding variables, ensuring that the results can be confidently attributed to the cause-and-effect relationship being tested.

Repeated Testing

In experimental design, a threat to internal validity due to participants becoming more and more familiar with a test.

Dropouts

Individuals who disengage or withdraw from a program, study, or activity before completion.