Only answer numbers: 4, 14, 20, 23 and 31 I. Solve the following equations and inequalities. For

Only answer numbers: 4, 14, 20, 23 and 31

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I. Solve the following equations and inequalities. For quadratic equations, use all methods. 1. 3r = 5r + 4 21. V5x + 9 = 2r +3 41. += -1 12r+6 %3D 2. ? - 3r = 0 42. |r + 4| = 2r - 3 43. -5r +3 > 2 22. r(r - 2) = 3 %3D 23. 음+ 올프 + 24. 9z? - 12x +5 = 0 3. a4 - 822 - 9 = 0 4. Iz + 기S 5 44. (2r – 1)(x - 1) = 3 5. 3(r + 2) = 8r +1 6. [82 - 10| >-6 7. 를 +3 %3D광 + 4 8. V5r -1 = 4 25. 5r 8r +3 %3D 45. 3r2 2 2r-5 26. r2 - 5x + 6 = 0 27. 3(r+ 4) - 2(r – 1) = 13 28. 112피-31> 11 29. 꽃 +93D +6 46. 8r 12 5x +8 47. 4+ > 고+ t 48. |- 5x + 1| = 9 9. 2r - 5| = |a+4| %3D 49. a2 - 4x – 1 = 0 + 32-2 -9 = 0 10. 16a" -4 30. 5z? - 17x + 6 0 50. -3 = 4 31. VI+2+1=V3r +3 32. (r2+4r)2-4(x²+4x)-32 = 0 51. |æ – 1| = 0 11. 23 = a - 3 12. 16r - 49 =0 13. = 14. 3r – 9| = 11 15. a - 9 =0 33. 4r – 7|< -8 52. ||5a - 4| + 1| = 12 %3D 34. 2 <r+3 53. -? + 4x +5 < 0 35. (3z - 1)(r + 1) = 7 54. z? + 4x + 6 = 0 16. 6r +7< 3x-2 36. 3r + 7| = |2x – 3| 55. 2 ( --1 = 0 56. 규+ 57. <0 58. > -3 17. 2r -32 2r +9 37. = 2r - 5 %3D %3D 18. |4r – 6| = -2 19. 36rt – 13zi +1 =0 38. 2r - 1| < 7 39. %3D 9+8 3r+2 2r+7 20. 3r + 5| = r - 7 40. [3z - 5| 21 I. Solve the following equations and inequalities. For quadratic equations, use all methods. 1. 3r = 5r + 4 21. V5x + 9 = 2r +3 41. += -1 12r+6 %3D 2. ? - 3r = 0 42. |r + 4| = 2r - 3 43. -5r +3 > 2 22. r(r - 2) = 3 %3D 23. 음+ 올프 + 24. 9z? - 12x +5 = 0 3. a4 - 822 - 9 = 0 4. Iz + 기S 5 44. (2r – 1)(x - 1) = 3 5. 3(r + 2) = 8r +1 6. [82 - 10| >-6 7. 를 +3 %3D광 + 4 8. V5r -1 = 4 25. 5r 8r +3 %3D 45. 3r2 2 2r-5 26. r2 - 5x + 6 = 0 27. 3(r+ 4) - 2(r – 1) = 13 28. 112피-31> 11 29. 꽃 +93D +6 46. 8r 12 5x +8 47. 4+ > 고+ t 48. |- 5x + 1| = 9 9. 2r - 5| = |a+4| %3D 49. a2 - 4x – 1 = 0 + 32-2 -9 = 0 10. 16a" -4 30. 5z? - 17x + 6 0 50. -3 = 4 31. VI+2+1=V3r +3 32. (r2+4r)2-4(x²+4x)-32 = 0 51. |æ – 1| = 0 11. 23 = a - 3 12. 16r - 49 =0 13. = 14. 3r – 9| = 11 15. a - 9 =0 33. 4r – 7|< -8 52. ||5a - 4| + 1| = 12 %3D 34. 2 <r+3 53. -? + 4x +5 < 0 35. (3z - 1)(r + 1) = 7 54. z? + 4x + 6 = 0 16. 6r +7< 3x-2 36. 3r + 7| = |2x – 3| 55. 2 ( --1 = 0 56. 규+ 57. <0 58. > -3 17. 2r -32 2r +9 37. = 2r - 5 %3D %3D 18. |4r – 6| = -2 19. 36rt – 13zi +1 =0 38. 2r - 1| < 7 39. %3D 9+8 3r+2 2r+7 20. 3r + 5| = r - 7 40. [3z - 5| 21