Page 787 - Basic College Mathematics with Early Integers

ANSWERS TO SELECTED EXERCISES A19

7 12
2
3
2
2
3
21. -6y - 2y + 12y 2 23. x + 14x + 24 25. 4a - 9 27. x + 10x + 25 29. b + b + 31. 6x + 25x + 10x + 1
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2
4
5 25
2
2
2
5
4
3
5
3
4
3
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33. 49x + 70x + 25 35. 4x - 4x + 1 37. 8x - 8x - 6x - 6x + 9 39. x + 2x + 3x + 2x + x 41. 10z - 3z + 3z - 2
2
2
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43. 1y - 3y - 16y - 122 sq ft 45. 1x - 3x + 12 sq m 47. answers may vary
Appendix C Inductive and Deductive Reasoning
Exercise Set Appendix C 1. inductive 3. deductive 5. inductive 7. 81 9. C 11. 36 13. E 15. 99,999 17. 9 19. 74 21. 241
23. 25. 27. 29. 31. 33. 35. answers may vary 37. birds
Wendy
39. 41. 43. promises 45. Joey 47. 15 people 49. Donna 51. Julio 53. 5 people Answers to Selected Exercises
bicycles tricycles roosters crow
politicians
64 1 3 8 45 1 3
Practice Final Exam 1. 113 2. 33 3. or 21 4. 5. 8 6. 40.902 7. -6.2 8. 16 9. or 22 10. -20.42 11.
3 3 4 11 2 2 8
5 2 1
12. -117 13. 12 14. 2 15. - or -1 16. 52,000 17. 34.9 18. 0.941 19. 0.85 20. 610% 21. 37.5% 22.
3 3 500
1 2 15 3in. 48 4 1
23. perimeter: 3 ft ; area: sq ft 24. 25. 26. 81.25 km/hr 27. 8-oz size 28. or 4 29. 11.4 30. 24 mi 31. 53 g
3 3 2 10days 11 11 3
32. $17 33. 1250 34. 75% 35. 38.4 lb 36. discount: $18; sale price: $102 37. 0.04 g 38. 10 qt 39. 16 ft 6 in. 40. mean: 38.4;
median: 42; no mode 41. 11 students 42. -1 43. 14z - 8 44. 40 45. 24 46. -2 47. 244 women 48. 12° 49. m∠x = 118° ;
1
m∠y = 62° ; m∠z = 118° 50. 26° 51. 7.5or7
2