Unit Test — Unit test Answers

The matrix represents the length of 12 in. and the width of 4 in. of a rectangle. If matrix multiplication is used to double the length and width of the rectangle, which rectangle represents the result of the matrix multiplication?

In the matrix below, what is the value of

Dakarai wrote the system of linear equations below.Dakarai then wrote the coefficient matrix that represents this system. Which matrix could she have written?

What is the product?

What is the product?

Jelani wrote the system of linear equations below to represent the number of student and adult tickets he and his friend sold to their school play.Jelani also wrote the augmented matrix to represent this system. Which matrix could Jelani have written?

If , what is 4R?

What is the summation notation for the geometric series 5 + 10 + 20 + 40 + 80?

What are the values of c and d in the matrix subtraction below?

Which of the following can be used to evaluate the series ?

An arithmetic series is represented by the equation . Which of the following is true?

Which is a coefficient matrix for the system of linear equations?

Which of the following sets of data would you likely represent with a square matrix?

The relationship between women’s whole-number shoe sizes and foot lengths is an arithmetic sequence, where an is the foot length in inches that corresponds to a shoe size of n. A women’s size 7 fits a foot inches long, and a women’s size 12 fits a foot 11 inches long. What is the explicit formula for the arithmetic sequence? Round to the nearest hundredth, if necessary.

What is the value of C in the matrix equation below?

What are the first three terms of a geometric sequence in which and the common ratio is 5?

What is the value of given the matrix equation below?