1. Determine whether the graphs of the pair of equations 2x + 3y = 6 and 4x + 6y = 5 are parallel, coinciding, or neither. A. all are correct B. coinciding C. parallel D. neither Hint 2. Which is the graph of the inequality y |x - 3|? A. B. C. D. Hint 3. Find the values of x and y for which the matrix equation is true. A. x = -3, y = 1 B. x = 1, y = -3 C. x = -1, y = -3 D. x = -3, y = -1 Hint 4. A. B. C. D. Hint 5. State the number of complex roots of the equation x4 - 3x2 - 4 = 0. A. 2 B. 3 C. 1 D. 4 Hint 6. Find the roots of x3 + 2x + 3 = 0. A. B. -1, 2 C. D. 1, -2 Hint 7. If find A. B. C. D. 7 Hint 8. In given a = 22, b = 39 and c = 19, find B. A. about 126.0° B. about 54.0° C. about 144.0° D. about 36.0° Hint 9. Change radians to degree measure. A. -135° B. 145° C. -145° D. 135° Hint 10. A bicycle wheel is 30 inches in diameter. If the wheel turns at a constant rate of 3 revolutions per second, what is the linear speed in miles per hour of a point on the tire? A. about 16.1 mph B. about 18.4 mph C. about 19.5 mph D. about 13.7 mph Hint 11. Determine if the function is periodic. If so, state the period. A. yes; 4 B. no C. yes; 2 D. yes; 1 Hint 12. Find the magnitude of for T(4, 0, -6) and M(5, -1, 0). A. B. C. D. 6 Hint 13. Graph the polar equation r = 2.5. A. B. C. D. Hint 14. Find the polar coordinates of R(-5, -7). A. (8.60, 0.95) B. (4.90, 4.09) C. (4.90, 0.95) D. (8.60, 4.09) Hint 15. Simplify the expression (5 – 2i) – (2 – 7i). A. 3 – 9i B. 7 – 9i C. 3 + 5i D. 7 + 5i Hint 16. Determine the intervals on which the function f(x) = x3 + x2 + x is increasing and the intervals on which the function is decreasing. A. increasing for x < 0 and x > 0 B. increasing for x < 0 and decreasing for x > 0 C. decreasing for all x D. increasing for all x Hint 17. Determine the slant asymptote for f(x) = . A. y = -x + 3 B. y = 4 C. y = x + 4 D. y = x + 3 Hint 18. || = 14, || = 9, and . Find ||. A. 5 B. 17 C. 126 D. 23 Hint 19. Express the number in rectangular form. A. B. C. D. Hint 20. Find the principal fourth root of 256i. Leave the result in polar form. A. B. 4 C. 4 (cos 0 + i sin 0) D. Hint