1. A(n) _____ is a transformation that occurs when a figure is moved from one location to another. A. addition B. dilation C. enlargement D. translation Hint 2. Find A. B. C. D. Hint 3. Triangle PQR with vertices P(-8, 9), Q(-3, -1), and R(2, 5) is translated so that P' is at (-12, 0). Find the translation matrix. A. B. C. D. Hint 4. Which product is not defined? A. [11 4 -3] B. C. [16 12 5] D. Hint 5. For the determinant , which is the minor of -4? A. B. C. D. Hint 6. Evaluate using diagonals. A. 33 B. 21 C. 37 D. 107 Hint 7. Determine which matrix is the 3 × 3 identity matrix. A. B. C. D. Hint 8. Write the matrix equation as a system of linear equations. A. -2s + t = 75s + 8t = 12 B. -2s = 75t = 12 C. -2s + t = 125s + 8t = 7 D. -2s + 5t = 7s + 8t = 12 Hint 9. Solve using inverse matrices. A. (4, 4) B. (4, -4) C. (-4, 0) D. (-4, 4) Hint 10. What are the dimensions of matrix A if A. 4 × 3 B. 4 × 4 C. 3 × 3 D. 3 × 4 Hint 11. What is always true of an n × n matrix? A. It is a column matrix. B. It is a square matrix. C. It is a row matrix. D. It has at least two rows and two columns. Hint 12. Find A – B if and A. B. C. D. Hint 13. Given that and use the fact that to find AB + AC. A. B. C. D. Hint 14. Solve the system –2x – 4y = 7, 3x + 5y = 9. A. B. (71, –39) C. D. Hint 15. Which of the following cannot be true concerning Cramer's Rule for two variables? A. B. C. D. Hint 16. Determine whether the pair of matrices are inverses. A. no, because fractions cannot be a part of an inverse B. no, because A · B I C. yes, because each entry in the second matrix is the reciprocal of its corresponding entry in the first matrix D. yes, because A · B = I Hint