Solve the System of Equations by the Addition Method $\left\{ \begin{array} { l } 7 x - 8 y = 8 \\35 x - 40 y = 32\end{array} \right.$

question 111

Multiple Choice

Solve the system of equations by the addition method.
- $\left\{ \begin{array} { l } 7 x - 8 y = 8 \\35 x - 40 y = 32\end{array} \right.$

• A) no solution
• B) \(\left( \frac { 20 } { 21 } , - \frac { 5 } { 6 } \right)\)
• C) \(( 8,32 )\)
• D) \(( 5,4 )\)

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Definitions:

Estimated Form

A version of a statistical model where the parameters have been estimated from data, as opposed to its theoretical or exact form.

Unit

The basic measure or standard used to quantify the results or elements in a dataset.

MSR

An acronym that can stand for Mean Squared Regression, representing the average squared difference between the observed and predicted values in regression analysis.

MSE

Mean Squared Error, a measure of the average squared differences between the observed actual outcomes and the outcomes predicted by a model.