Solve the System by the Addition Method $$\begin{array} { l } 7 x + 9 y = 128 \\3 x - 9 y = - 48\end{array}$$

question 44

Multiple Choice

Solve the system by the addition method. $$\begin{array} { l } 7 x + 9 y = 128 \\3 x - 9 y = - 48\end{array}$$

• A) \(( - 1,15 )\)
• B) \(( 17,1 )\)
• C) \(( 8,8 )\)
• D) \(( 17,11 )\)

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Definitions:

Average Amount

The sum of values divided by the number of values, commonly known as the mean.

Alternative Hypothesis

The alternative hypothesis is a statement in statistics that contradicts the null hypothesis and indicates that there is a significant difference between specified populations.

Null Hypothesis

A statistical hypothesis that assumes no significant difference or effect in a given experiment or study, serving as a starting point for testing.

SRS

An abbreviation for Simple Random Sample, a sampling method where every member of the population has an equal chance of being selected.