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  1. 1 6:55 What are variables, expressions, and equations? | Introduction to algebra | Algebra I | Khan Academy Khan Academy · 2.1M views
  2. 2 11:06 How to solve equations of the form ax = b | Linear equations | Algebra I | Khan Academy Khan Academy · 2.9M views
  3. 3 8:41 Solving a more complicated equation | Linear equations | Algebra I | Khan Academy Khan Academy · 2M views
  4. 4 8:53 Introduction to solving an equation with variables on both sides | Algebra I | Khan Academy Khan Academy · 2.7M views
  5. 5 7:39 Algebra: Linear equations 4 | Linear equations | Algebra I | Khan Academy Khan Academy · 1.4M views
  6. 6 6:26 Algebra: Solving Inequalities Khan Academy · 1.8M views
  7. 7 9:50 Algebra: graphing lines 1 Khan Academy · 728.9K views
  8. 8 8:36 Algebra: Slope and Y-intercept intuition Khan Academy · 444.4K views
  9. 9 8:28 Algebra: Slope Khan Academy · 498.5K views
  10. 10 9:46 Algebra: Slope 2 Khan Academy · 282.7K views
  11. 11 6:23 Algebra: Slope 3 Khan Academy · 194.9K views
  12. 12 6:46 Algebra: Equation of a line Khan Academy · 603.2K views
  13. 13 5:54 Slope and Y-intercept Intuition Khan Academy · 355.5K views
  14. 14 8:37 Averages | Linear equations | Algebra I | Khan Academy Khan Academy · 412.7K views
  15. 15 9:56 Integer sums Khan Academy · 271.4K views
  16. 16 9:55 Taking percentages | Linear equations | Algebra I | Khan Academy Khan Academy · 586.5K views
  17. 17 9:43 Growing by a percentage | Linear equations | Algebra I | Khan Academy Khan Academy · 620.5K views
  18. 18 6:18 Percent word problem example 1 | Ratios, rates, and percentages | 6th grade | Khan Academy Khan Academy · 728.8K views
  19. 19 9:05 More percent problems | Linear equations | Algebra I | Khan Academy Khan Academy · 256.3K views
  20. 20 9:58 systems of equations Khan Academy · 871.4K views
  21. 21 14:13 Introduction to ratios | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy Khan Academy · 2.4M views
  22. 22 5:12 Ratio problem with basic algebra | Linear equations and inequalities | Algebra Basics | Khan Academy Khan Academy · 414.8K views
  23. 23 9:58 More advanced ratio problem–with Algebra (HD version) Khan Academy · 179.1K views
  24. 24 7:02 Alternate Solution to Ratio Problem (HD Version) Khan Academy · 88.9K views
  25. 25 7:27 Introduction to Ratios Khan Academy · 271.6K views
  26. 26 9:58 Advanced ratio problems Khan Academy · 180.9K views
  27. 27 7:14 Age word problems 1 | Linear equations | Algebra I | Khan Academy Khan Academy · 470.7K views
  28. 28 9:57 Age word problems 2 | Linear equations | Algebra I | Khan Academy Khan Academy · 203.7K views
  29. 29 4:10 Age word problems 3 | Linear equations | Algebra I | Khan Academy Khan Academy · 156.4K views
  30. 30 8:00 Level 1 multiplying expressions Khan Academy · 190.1K views
  31. 31 9:12 Solving a quadratic by factoring | Quadratic equations | Algebra I | Khan Academy Khan Academy · 548.6K views
  32. 32 5:20 Introduction to i and imaginary numbers | Imaginary and complex numbers | Precalculus | Khan Academy Khan Academy · 1.4M views
  33. 33 6:21 Calculating i raised to arbitrary exponents | Precalculus | Khan Academy Khan Academy · 716.4K views
  34. 34 6:45 i as the principal root of -1 (a little technical) | Precalculus | Khan Academy Khan Academy · 377.1K views
  35. 35 10:10 Complex Numbers (part 1) Khan Academy · 971.5K views
  36. 36 8:58 Complex Numbers (part 2) Khan Academy · 448.9K views
  37. 37 9:15 Introduction to the quadratic equation | Quadratic equations | Algebra I | Khan Academy Khan Academy · 1.5M views
  38. 38 9:14 Quadratic equation part 2 | Quadratic equations | Algebra I | Khan Academy Khan Academy · 348.3K views
  39. 39 13:45 Completing the square Khan Academy · 959.4K views
  40. 40 7:34 Quadratic formula (proof) | Quadratic equations | Algebra I | Khan Academy Khan Academy · 326.9K views
  41. 41 9:49 Quadratic inequalities | Polynomial and rational functions | Algebra II | Khan Academy Khan Academy · 501.9K views
  42. 42 9:52 Quadratic inequalities (visual explanation) | Algebra II | Khan Academy Khan Academy · 381.1K views
  43. 43 9:34 Introduction to functions Khan Academy · 1.1M views
  44. 44 9:54 Functions Part 2 Khan Academy · 576.9K views
  45. 45 9:15 Functions (Part III) Khan Academy · 331.6K views
  46. 46 6:08 Functions (part 4) Khan Academy · 249.3K views
  47. 47 9:59 Domain of a function | Functions and their graphs | Algebra II | Khan Academy Khan Academy · 1.1M views
  48. 48 7:09 Proof: log a + log b = log ab | Logarithms | Algebra II | Khan Academy Khan Academy · 387.2K views
  49. 49 7:59 Proof: a log b = log(b^a), log a – log b = log(a/b) | Logarithms | Algebra II | Khan Academy Khan Academy · 222K views
  50. 50 7:27 Proof: log_a (B) = (log_x (B))/(log_x (A)) Khan Academy · 78K views
  51. 51 10:21 Algebraic Long Division Khan Academy · 302.2K views
  52. 52 10:58 Introduction to conic sections | Conic sections | Algebra II | Khan Academy Khan Academy · 1.1M views
  53. 53 9:04 Conic Sections: Intro to Circles Khan Academy · 484.1K views
  54. 54 14:14 Conic sections: Intro to ellipse | Conic sections | Algebra II | Khan Academy Khan Academy · 804.4K views
  55. 55 13:34 Conic sections: Intro to hyperbolas | Conic sections | Algebra II | Khan Academy Khan Academy · 604.7K views
  56. 56 7:30 Conic sections: Hyperbolas 2 | Conic sections | Algebra II | Khan Academy Khan Academy · 228.5K views
  57. 57 10:29 Conic sections: Hyperbolas 3 | Conic sections | Algebra II | Khan Academy Khan Academy · 165.6K views
  58. 58 9:11 Identifying an ellipse from equation | Conic sections | Algebra II | Khan Academy Khan Academy · 223.1K views
  59. 59 11:28 Identifying a hyperbola from an equation | Conic sections | Algebra II | Khan Academy Khan Academy · 121.1K views
  60. 60 11:34 Identifying circles and parabolas from equations | Conic sections | Algebra II | Khan Academy Khan Academy · 144.3K views
  61. 61 13:49 Foci of an ellipse | Conic sections | Algebra II | Khan Academy Khan Academy · 628.5K views
  62. 62 15:24 Foci of a hyperbola | Conic sections | Algebra II | Khan Academy Khan Academy · 260.1K views
  63. 63 14:50 Proof: Hyperbola foci | Conic sections | Algebra II | Khan Academy Khan Academy · 116.4K views
  64. 64 11:28 Partial fraction expansion 1 | Partial fraction expansion | Precalculus | Khan Academy Khan Academy · 1.2M views
  65. 65 13:02 Partial fraction expansion 2 | Partial fraction expansion | Precalculus | Khan Academy Khan Academy · 560.2K views
  66. 66 10:35 Partial fraction expansion 3 | Partial fraction expansion | Precalculus | Khan Academy Khan Academy · 388.8K views
  67. 67 14:31 Parabola Focus and Directrix 1 Khan Academy · 400.7K views
  68. 68 18:28 Focus and Directrix of a Parabola 2 Khan Academy · 163.1K views
  69. 69 5:39 Two Passing Bicycles Word Problem Khan Academy · 73.6K views
  70. 70 5:54 Passed Bike Word Problem Khan Academy · 42.5K views
  71. 71 9:07 Passing Trains Khan Academy · 91K views
  72. 72 9:52 Overtaking Word Problem Khan Academy · 59.1K views
  73. 73 7:08 Early train word problem | Linear equations | Algebra I | Khan Academy Khan Academy · 95.7K views
  74. 74 8:54 Officer on Horseback Khan Academy · 62.8K views
  75. 75 11:49 Rational inequalities | Polynomial and rational functions | Algebra II | Khan Academy Khan Academy · 569.6K views
  76. 76 13:15 Rational inequalities 2 | Polynomial and rational functions | Algebra II | Khan Academy Khan Academy · 204.9K views
  77. 77 16:16 Interesting Polynomial Coefficient Problem Khan Academy · 100.5K views
  78. 78 17:36 Finite geometric series word problem: mortgage | Housing | Finance & Capital Markets | Khan Academy Khan Academy · 170.2K views
  79. 79 9:05 Introduction to function inverses | Functions and their graphs | Algebra II | Khan Academy Khan Academy · 1.3M views
  80. 80 6:44 Function inverse example 1 | Functions and their graphs | Algebra II | Khan Academy Khan Academy · 719.1K views
  81. 81 7:12 Function inverses example 2 | Functions and their graphs | Algebra II | Khan Academy Khan Academy · 354.6K views
  82. 82 7:35 Function inverses example 3 | Functions and their graphs | Algebra II | Khan Academy Khan Academy · 278.2K views
  83. 83 9:54 Direct and inverse variation | Rational expressions | Algebra II | Khan Academy Khan Academy · 1.4M views
  84. 84 7:05 Recognizing direct and inverse variation | Rational expressions | Algebra II | Khan Academy Khan Academy · 283.2K views
  85. 85 12:25 Recognizing odd and even functions | Functions and their graphs | Algebra II | Khan Academy Khan Academy · 894.1K views
  86. 86 4:08 Connection between even and odd numbers and functions | Algebra II | Khan Academy Khan Academy · 169.5K views
  87. 87 6:50 New operator definitions | Functions and their graphs | Algebra II | Khan Academy Khan Academy · 169.1K views
  88. 88 9:23 Proof by induction | Sequences, series and induction | Precalculus | Khan Academy Khan Academy · 1.6M views
  89. 89 3:32 Alternate proof to induction for integer sum | Precalculus | Khan Academy Khan Academy · 162.9K views
  90. 90 5:51 Setting up proportions to solve word problems | 7th grade | Khan Academy Khan Academy · 827.3K views
  91. 91 4:03 Converting repeating decimals to fractions 1 | Linear equations | Algebra I | Khan Academy Khan Academy · 1.5M views
  92. 92 9:06 Converting repeating decimals to fractions 2 | Linear equations | Algebra I | Khan Academy Khan Academy · 775.3K views