Overview of Matrices 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 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!

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Question 1 1. What kinds of brackets are used in proper matrix notation?

Question 2 2. What is the number in the first row and first column in the answer matrix?

Question 3 3. What is the number in the second row and third column in the answer matrix?

Question 4 4. Which of the following is not a valid matrix operation?

Question 5 5. When you multiply matrices, if the first matrix is a 4x3 matrix, which of the following matrices can we multiply with the first?

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Question 6 6. Find the determinant of the following matrix:

Question 7 7. Find the minor at row 2, column 3 for the following matrix:

Question 8 8. Find the adjugate matrix for the cofactor matrix given by

Question 9 9. What number is located at row 2 and column 3 in the following matrix?

Question 10 10. The adjugate matrix is the _____.

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Question 11 11. Which of the following describes what a matrix looks like?

Question 12 12. Which of the following is NOT true regarding matrices?

Question 13 13. How many rows would a matrix that represents a system of 5 variables and 3 equations have?

Question 14 14. Which system of equations is represented by the following matrix? (Think of the vertical line as the equal sign.)

Question 15 15. What of these symbols is commonly used to enclose a matrix?

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Question 16 16. Which equation(s) need to be rewritten in this linear system before we can write it in augmented matrix form?

Question 17 17. Rewrite the 3rd equation in proper form so that we can turn it into augmented matrix form.

Question 18 18. Which of the following is an equation included in this matrix?

Question 19 19. Write in augmented matrix form.

Question 20 20. What is the complete list of equations included in this augmented matrix?

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Question 21 21. Find the determinant of the following matrix.

Question 22 22. Find the determinant of the following matrix.

Question 23 23. What size is the following matrix?

Question 24 24. Which of the following would be a square matrix?

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

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Question 26 26. Solve for x:

Question 27 27.

What is the inverse matrix of A if A =

1 7

3 11

Question 28 28. Can you ever divide by a matrix?

Question 29 29.

What is the the determinant of the matrix

2 3

-1 5

Question 30 30. How do you verify you have correctly calculated an inverse matrix?

Overview of Matrices 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!

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