1. Solve 18 + a = 36. A. 18 B. 54 C. -2 D. -18 Hint 2. Evaluate 1.5 + |2x - 4| if x = -3. A. -11.5 B. 11.5 C. 3.5 D. -0.5 Hint 3. What is the x-intercept of the graph below? A. -3 B. -2 C. 2 D. 3 Hint 4. The temperature f(x) of water in a lake in degrees Fahrenheit is estimated by the function shown below, where x is the depth in feet of the water. What would be the temperature of water 30 feet below the surface? A. 111°F B. 63°F C. 71.25°F D. 33°F Hint 5. Describe the line that is graphed below. A. passes through the point (3,-2) with a slope of B. passes through the point (3,-2) with a slope of C. passes through the point (3,2) with a slope of D. passes through the point (3,-2) with a slope of Hint 6. Find [6,3,-1]. A. B. [3 3 -1] C. D. Hint 7. Find A. B. C. D. Hint 8. Evaluate using diagonals. A. 21 B. 33 C. 37 D. 107 Hint 9. Solve the equation A. 9 B. C. 1 D. 20 Hint 10. Solve the equation | 4k + 6 | = 5k + 3. A. -1 B. C. {-1, 3} D. 3 Hint 11. Solve 6z > 39. A. {z | z > 234} B. C. D. {z | z < 234} Hint 12. Solve the inequality | 6x + 2 | < 5. A. B. C. D. Hint 13. Graph the relation represented by y = x2 – x + 1. A. B. C. D. Hint 14. Which graph shows the inequality 5x – 2y 8? A. B. C. D. Hint 15. The Waxmans just opened a carpet store. Their startup costs were \$5000, and their cost of carpet is \$8 per square yard. How many square yards of carpet do they need to sell in order to break even if they sell the carpet for \$18 per square yard? A. 500 square yards B. 50 square yards C. 278 square yards D. 192 square yards Hint 16. What are the solutions to the system y + 2x – 5z = 4, –2y – 4x + 10z = 8, 3y + x – 3z = 5? A. no solution B. (2, 2, –2) C. (2, 2, 1) D. infinite Hint 17. What is always true of an n × n matrix? A. It is a square matrix. B. It is a column matrix. C. It has at least two rows and two columns. D. It is a row matrix. Hint 18. Which of the following is the correct rotation matrix for a rotation of 180°counterclockwise about the origin? A. B. C. D. Hint 19. Find the value of the determinant of A. –32 B. 6 C. 64 D. 2 Hint 20. Find the area of a triangle whose vertices are located at (-3, 2), (0, -5), and (4, 4). A. 1 B. C. D. 55 Hint