A. B. 45212 C. 45214 D. 45216 11. Which of these forms a geometric sequence? A. 2, 10, 20, 22 B. 1,², 1/6lla C. 2, 7, 12, 17, 22 D-6, 12, -24, 48 12. What geometric mean is between 9 and -81? A 45 B.-27 C. 27 D. 127 13. If you were dividing x* + 4x + 2, how many O's would you needed when setting up the top row of your synthetic division? A. 0 B. 2 C. 4 D. 6 14. What will be the quotient when we divide x2 - 3x - 10 by x - 5? A. x + 7 B. X- 10 c. x + 2 D. x-7 15. Which of the following is the arithmetic mean of 10 and 14? A. 8 B. 10 C. 12 D. 140 16. What is the largest among the arithmetic means in the sequence 15, 18, 21, 24, 27? A. 18 B.21 C. 24 D.27 17. What is the value of m in the arithmetic sequence 2, 3m +12 if arithmetic mean is 8? A.3 B. 2 C. D. 18. All the choices are roots of the equation x3 - 7x2 + 7x + 15 = 0 EXCEPT: A. 3 B. - 1 C.5 D.-5 19. What is the degree of the equation with roots 4,5, -1,6 and 3? A. 1 B. 5 C. 6 D.7 20. If the highest exponent is 5, how many real roots can the given equation have? A. 5 or less B. exactly 5 C.5 or more D. less than 5​