1. Graph the solution set of A. B. C. D. Hint 2. Solve the system of equations by using substitution. A. (4, 9) B. (5, 11) C. (1, 3) D. (3, 7) Hint 3. The solution of a system of three linear equations in three variables, x, y, and z, is called a(n) ____ (x, y, z). A. ordered triple B. integer C. ordered pair D. sum Hint 4. Solve  y2 + 8y + 16 = 0 by factoring. A. -4 B. 4, 8 C. 4 D. -4, 4 Hint 5. The enrollments at the University of Texas at Austin in some recent years were 47,905, 48,008, 48,857, 48,906, and 49,009. Find the standard deviation of the data. A. 477.62 B. 434.00 C. 452.93 D. 461.28 Hint 6. Solve logb 36 = 2 A. 6 B. -6 C. 18 D. -6, 6 Hint 7. Find a9 for the geometric sequence . A. 16 B. 8 C. 1 D. 4 Hint 8. How many lines are determined by 7 points, no three of which are collinear? A. 105 B. 21 C. 200 D. 42 Hint 9. What is the probability of selecting 3 vowels at random from the word mathematics? A. B. C. D. Hint 10. Find the probability of rolling two number cubes and getting a 2 on one number cube and a 6 on the other? A. B. C. D. Hint 11. In 1992, 92% of the people surveyed felt that professional athletes were overpaid. If the margin of error for the sampling was 3%, how many people were surveyed? A. 225 B. 736 C. 327 D. 2944 Hint 12. If what is the value of A. 89 B. 29 C. D. 27 Hint 13. Is the relation shown in the graph a function? Why or why not? A. No, the relation contains the ordered pairs (3, -1) and (3, 2). B. No, the relation contains the ordered pairs (0, -1) and (3, -1). C. Yes, the relation contains very few ordered pairs. D. Yes, the ordered pairs (-3, 2), (-1, 1), and (3, -1) form a straight line. Hint 14. Which is true for the following system of equations?3x - y = 1x + 2y = 7. A. y < x B. cannot be determined from information given C. y = x D. y > x Hint 15. Find A – B if and A. B. C. D. Hint 16. Find A. q – 9 B. C. q + 9 D. Hint 17. A. 36 B. 72 C. D. 6 Hint 18. Which of the following points will be included in the graph of A. (8, 3) B. (11, 5) C. (4, 1) D. (2, 1) Hint 19. What is the 21st iterate of the function if x0 = 3. A. –19 B. –1 C. –3 D. 3 Hint 20. Mathematical induction proves statements about which of the following? A. positive integers B. all integers C. all positive real numbers D. all real numbers Hint