1. Evaluate a - b2 if a = 4 and b = 3. A. -5 B. 1 C. -13 D. 13 Hint 2. Write an algebraic expression to represent ''the sum of 6 and three times a number squared.'' A. 6 + 3x2 B. 6 + 3x C. 6(3x) D. 6(3x)2 Hint 3. The formula for the area of a trapezoid is Solve the formula for h. A. B. C. D. Hint 4. Graph the solution set of A. B. C. D. Hint 5. In a science experiment, students hung a cup from a spring and measured the length of the spring when candies were added to it. Their data are shown in the table below. Which statement is true? A. The relation is a function because the range values increase. B. The relation is not a function because there are two y values for some x values. C. The relation is a function because for each x value, there is exactly one y value. D. The relation is not a function because only a line can be a function. Hint 6. Which function is not linear? A. f(x) = 8 B. f(x) = 2x3 C. f(x) = 14x + 7 D. Hint 7. Write an equation of the line that passes through (10,-4) and is perpendicular to the line whose equation is A. B. C. D. Hint 8. If f(x) = [2x - 1], find f(5.4). A. 9 B. 8 C. 9.8 D. 10 Hint 9. Choose the graph of A. B. C. D. Hint 10. Solve the system of equations by using substitution. A. (5, 11) B. (1, 3) C. (4, 9) D. (3, 7) Hint 11. Determine which matrix has a determinant. A. B. [1 -4 -8] C. D. Hint 12. Evaluate z – (2yz + y) · y if y = -3 and z = 2. A. 23 B. -43 C. 9 D. 47 Hint 13. Evaluate p · (p + 3q) – r if p = -7, q = 4, and r = -16. A. -51 B. 77 C. 45 D. -19 Hint 14. What is the inequality represented in the graph? A. x + 2y 4 B. x + 2y > 4 C. x + 2y 4 D. x + 2y < 4 Hint 15. Which of the following systems of equations is inconsistent? A. y = 7x – 2 y = –2x – 5 B. 4y – x = 12 3y – 2x = 1 C. 3y + 2x = 13 6y + 4x = 3 D. y = 2x – 3 y = –3x + 4 Hint 16. 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 17. At a firm, there are three workers that are supposed to work a combined 110 hours per week. Worker 1 is supposed to work 5 hours more than worker 2, and worker 2 is supposed to work 15 hours more than worker 3. How long should each one work? A. worker 1: 42.5worker 2: 37.5worker 3: 30 B. worker 1: 45worker 2: 40worker 3: 25 C. worker 1: 40worker 2: 45worker 3: 25 D. worker 1: 45worker 2: 35worker 3: 30 Hint 18. Find the coordinates of the vertices of the image of a rectangle ABCD with A(4, -3), B(-3, 1), C(-7, -3), and D(5, 2) after a reflection across the line y = x. A. A'(-3, 4),B'(1, -3),C'(-3, -7),D'(2, 5) B. A'(3, 4),B'(-1, -3),C'(3, -7),D'(-2, 5) C. A'(-3, -4),B'(1, 3),C'(-3, 7),D'(2, -5) D. A'(-4, -3),B'(3, 1),C'(7, -3),D'(-5, 2) Hint 19. Solve 2.4x + 1.7y = 8.2, 3.8x – 0.8y = 5.3. Round to the nearest hundredth. A. (–1.86, –2.20) B. (–1.86, 2.20) C. (1.86, –2.20) D. (1.86, 2.20) Hint 20. Solve the system of equations4x – 2y = 2, –3x + 7y = –29 A. (–2, –5) B. (–2, 5) C. no solution D. (2, –5) Hint