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# CAHSEE - Matrices and Absolute Value: Help and Review Chapter Exam

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 "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. Solve the equation: |x| = 99.

#### Question 2 2. Evaluate |r+4| - 3|s| when r = 5 and s = -1.

#### Question 3 3. 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 4 4. A graph of y = (1/3)|x| would exhibit which of the following characteristics.

#### Question 5 5. Which system of equations is represented by the following matrix? (Think of the vertical line as the equal sign.)

### Page 2

#### Question 6 6. Evaluate |4 + 7| - |4 - 7|

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

#### Question 8 8. What are the coordinates of the vertex of the graph y = |x - 9| - 2?

#### Question 9 9. What is the first step to solving the equation |4x - 2| = 5?

#### Question 10 10. What number can we substitute for x that will make the absolute value of x = 12?

### Page 3

#### Question 11 11. Which of the following would be a square matrix?

#### Question 12 12. Solve the equation: |3x - 9| = 27.

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

#### Question 14 14. Which graph describes the following equation?

#### Question 15 15. Which graph below could represent an absolute value?

### Page 4

#### Question 16 16. A transformation that shifts the graph up/down or left/right is called which one of the following?

#### Question 17 17. Solve the equation: |2x + 5| = 11.

#### Question 18 18. What is the correct expression for the absolute value of the following number: 8?

#### Question 19 19. Subtract the following matrices:

#### Question 20 20. Which equation matches the graph below?

### Page 5

#### Question 21 21. How many rows would a matrix that represents a system of 5 variables and 3 equations have?

#### Question 22 22. Which equation describes the following graph?

#### Question 23 23. Which absolute value equation would have a graph that is an upside down V?

#### Question 24 24. What of these symbols is commonly used to enclose a matrix?

#### Question 25 25. Which choice below could be a possible answer to the determinant of a matrix?

### Page 6

#### Question 26 26. Which graph matches the equation below?

#### Question 27 27. Absolute values make positive numbers _____ and negative numbers _____.

#### Question 28 28. Add the following matrices:

#### Question 29 29. Evaluate |5 - 3| + 4|3 - 5|

#### Question 30 30. Solve the equation: -2|x| = 10.

#### CAHSEE - Matrices and Absolute Value: Help and Review 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 "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!

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