Solve Using a System of Two Equations in Two Unknowns

question 29

Multiple Choice

Solve using a system of two equations in two unknowns.
-Aviva has 67 dimes and nickels. The total value of the coins is $5.55. Find the number of each type of coin.

• A) 44 nickels and 23 dimes
• B) 23 nickels and 44 dimes
• C) 25 nickels and 42 dimes
• D) 28 nickels and 39 dimes

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Definitions:

Fitted Values

Estimates or predictions generated by a statistical model that represent the best guesses for the dependent variable based on the model and the input values.

Constant Variance

The condition in which the variance of the error terms in a regression model is the same across all levels of the independent variable.

Correlation Coefficient

A numerical index that determines both the magnitude and orientation of a linear correlation between two variables, which can vary between -1 and 1.

Variables

Elements, features, or factors that are likely to vary or change among subjects in a study or a population.