Unit 3 Test Review

1. Unit 3 Test Review Write the numbers 1 – 20 on a piece of paper

2. Instructions • There are 20 multiple choice questions. • Do not copy out the questions just do them. • The questions and answers are available on classnet. • Try to do the questions before you look at the possible answers. • There will be no multiple choice questions on the real test but these questions represent many of the types of questions that could appear on the test.

3. 1) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

4. 2) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

5. 3) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

6. 4) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

7. 5) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

8. 6) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

9. 7) Select the correct statement about the equations corresponding to the graphs below. • a) GRAPH A GRAPH B A and B would each have 2 real roots. b) A and B would each have 2 imaginary roots. c) A and B would each have 1 real root. d) A would have 2 real roots while B would have no roots. e) A would have 2 real roots while B would have 2 imaginary roots.

10. 8) Determine the vertex. • a) (1, 7) b) (-1, -1) c) (2, 25) d) (0, 1) e) (-4, 17)

11. 9) Determine the vertex. • a) (-4,-1) b) (4, -1) c) (2, 4) d) (-4, 1) e) (4, 1)

12. 10) Determine the vertex. • a) (2/3, 1/4) b) (2/3, -1/4) c) (5/12, -2) d) (5/24 , -121/48) e) (-13/8, 13/6)

13. 11) Determine the vertex. • a) (-1, -6) b) (1, 1) c) (1, -2) d) (-1/2 ,-13/2) e) (1/2,-9.5)

14. 12) One root of an equation is 2 + 3i. Determine the other root. • a) -2 + 3i b) -2 – 3i c) 2 – 3i d) 2 + 3i e) 5i

15. 13) Determine the roots. • a) -1/2 and 3/2 b) 1/2 and -3/2 c) -1 and -3 d) 6 and -2 e) -6 and 2

16. 14) Determine the roots. • a) -4 b) 2 c) 2 and -2 d) +2i and -2i e) no roots

17. 15) Determine the roots. • a) b) c) d) e) no roots

18. 16) Determine the roots. • a) b) c) d) e) no roots

19. 17) Determine the revenue function if and x represents number of items sold. • a) b) c) d) e)

20. 18) Determine the profit function if • a) b) c) d) e)

21. 19) The cost to feed a cow is $1 per day. The cow currently weighs 100kg and is gaining 0.5kg per day. The price per kg of beef is $2 and falling by 5 cents per day. The profit function is: • a) b) c) d) e)

22. 20) Determine the value of k if the function has 2 real roots. • a) b) c) d) e)

23. Unit 2 Test ReviewANSWERS

24. 1) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

25. 2) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

26. 3) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

27. 4) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

28. 5) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

29. 6) Determine the number of zeros. • a) 0 zeros b) 1 zero c) 2 zeros d) 3 zeros e) Cannot be determined.

30. 7) Select the correct statement about the equations corresponding to the graphs below. • a) GRAPH A GRAPH B Graph A has 2 x-intercepts therefore 2 real roots, Graph B has no x-intercepts therefore 2 imaginary roots. A and B would each have 2 real roots. b) A and B would each have 2 imaginary roots. c) A and B would each have 1 real root. d) A would have 2 real roots while B would have no roots. e) A would have 2 real roots while B would have 2 imaginary roots.

31. 8) Determine the vertex. • a) (1, 7) b) (-1, -1) c) (2, 25) d) (0, 1) e) (-4, 17)

32. 9) Determine the vertex. • a) vertex form parabola. (-4,-1) b) (4, -1) c) (2, 4) d) (-4, 1) e) (4, 1)

33. 10) Determine the vertex. • a) x-ints: 2/3 and -1/4 axis: (2/3 + -1/4) / 2 (2/3, 1/4) =5/24 b) (2/3, -1/4) OV: f(5/24) c) (5/12, -2) =-121/48 d) (5/24 , -121/48) e) (-13/8, 13/6)

34. 11) Determine the vertex. • a) (-1, -6) b) (1, 1) c) (1, -2) d) (-1/2 ,-13/2) e) (1/2,-9.5)

35. 12) One root of an equation is 2 + 3i. Determine the other root. • a) The other root is known as the complex conjugate. Switch the sign of the imaginary part of the number. -2 + 3i b) -2 – 3i c) 2 – 3i d) 2 + 3i e) 5i

36. 13) Determine the roots. • a) -1/2 and 3/2 b) 1/2 and -3/2 c) -1 and -3 d) 6 and -2 e) -6 and 2

37. 14) Determine the roots. • a) -4 b) 2 c) 2 and -2 d) +2i and -2i e) no roots

38. 15) Determine the roots. • a) b) c) d) e) no roots

39. 16) Determine the roots. • a) b) c) d) e) no roots

40. 17) Determine the revenue function if and x represents number of items sold. • a) p(x) is the price. Multiply the price by the number of items sold to get revenue. b) c) d) e)

41. 18) Determine the profit function if • a) b) c) d) e)

42. 19) The cost to feed a cow is $1 per day. The cow currently weighs 100kg and is gaining 0.5kg per day. The price per kg of beef is $2 and falling by 5 cents per day. The profit function is: • a) b) c) d) e)

43. 20) Determine the value of k if the function has 2 real roots. • a) b) c) d) e)

44. Tomorrow we will review mostly problem solving questions. • Begin working on the assigned textbook review. • These questions are on CLASSNET if you want to try them again.