# Solving Matrices and Absolute Value: Tutoring Solution Chapter Exam

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

### Page 1

#### Question 1 1. Evaluate |r+s|-(r+s) when -s = r+8.

#### Question 2 2. Evaluate |4+7|-|4-7|

#### Question 3 3. Evaluate |r+4| - 3|s| when r = 5 and s = -1.

#### Question 4 4. Solve the equation: 3|x - 2| - 1 = 11.

#### Question 5 5. How many rows would a matrix that represents a system of 5 variables and 3 equations have?

### Page 2

#### Question 6 6. What size is the following matrix?

#### Question 7 7. If a question requires us to know the value of |2x+y|, but all we know is that |x+y|=5, what can we do?

#### Question 8 8. What is the first step to solving the equation |2x + 1| - 5 = 7?

#### Question 9 9. If a question requires us to know the value of y-x, but all we know is that x+2=y, what can we do?

#### Question 10 10. Which system of equations is represented by the following matrix? (Think of the vertical line as the equal sign.)

### Page 3

#### Question 11 11. Which equation matches the graph below?

#### Question 12 12. Which graph matches the equation below?

#### Question 13 13. Find the determinant of the following matrix.

#### Question 14 14. Which absolute value equation would have a graph that is an upside down V?

#### Question 15 15. 'Solve the equation' means to _____.

### Page 4

#### Question 16 16. Solve the equation: |2x + 5| = 11.

#### Question 17 17. Which of the following describes what a matrix looks like?

#### Question 18 18. Which of the following is NOT true regarding matrices?

#### Question 19 19. Solve the equation: |x+8| = -1.

#### Question 20 20. Which of the following would be a square matrix?

### Page 5

#### Question 21 21. Which equation matches the graph below?

#### Question 22 22. Which graph matches the equation below?

#### Question 23 23. Which graph below could represent an absolute value?

#### Question 24 24. Solve the equation: |x| = 99.

#### Question 25 25. Absolute values make positive numbers _____ and negative numbers _____.

### Page 6

#### Question 26 26. Which symbol is used to represent absolute value?

#### Question 27 27. Which choice below could be a possible answer to the determinant of a matrix?

#### Question 28 28. What are the coordinates of the vertex of the graph y = |x - 9| - 2?

#### Question 29 29. Solve the equation: |2x-5|=5.

#### Question 30 30. Getting an absolute value to equal a negative number is _____.

#### Solving Matrices and Absolute Value: Tutoring Solution Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!