Vector Multiplication Using Matrices — Unit test Answers

Based on the information below, what are the values of x and y of the solution to the system of equations used to create the information?, ,

Using Cramer’s Rule, what is the value of x in the solution to the system of linear equations below?

Which system of linear equations can be solved using equation ?

Which angle of rotation is determined by the matrix below?

Indira has 18 coins valued at $4.20. She has only quarters and dimes. Which augmented matrix can be used to determine the number of quarters and dimes in the collection?