Introduction to Ratios Basic ratio problems. (from KhanAcademy.org)
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Channels: Mathematics
Tags: Introduction to Ratios
Uploaded by: khanalgebra ( Send Message ) on 05-09-2012.
Duration: 7m 27s
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Lec 4 - Descartes and Cartesian Coordinates
Lec 5 - Variables Expressions and Equations
Lec 9 - Algebra: Linear Equations 4
Lec 10 - Algebra: Solving Inequalities
Lec 11 - Algebra: graphing lines 1
Lec 12 - Algebra: Slope and Y-intercept intuition
Lec 16 - Algebra: Equation of a line
Lec 17 - Slope and Y-intercept Intuition
Lec 21 - Growing by a percentage
Lec 22 - Another Percent Word Problem
Lec 23 - More percent problems
Lec 25 - Introduction to Ratios (new HD version)
Lec 26 - Ratio problem with basic algebra (new HD)
Lec 27 - More advanced ratio problem--with Algebra (HD version)
Lec 28 - Alternate Solution to Ratio Problem (HD Version)
Lec 30 - Advanced ratio problems
Lec 34 - Level 1 multiplying expressions
Lec 35 - Solving a quadratic by factoring
Lec 36 - Introduction to i and Imaginary Numbers
Lec 37 - Calculating i Raised to Arbitrary Exponents
Lec 38 - i as the Principal Root of -1 (a little technical)
Lec 39 - Complex Numbers (part 1)
Lec 40 - Complex Numbers (part 2)
Lec 41 - Introduction to the quadratic equation
Lec 42 - Quadratic Equation part 2
Lec 43 - Completing the square
Lec 44 - Quadratic Formula (proof)
Lec 45 - Quadratic Inequalities
Lec 46 - Quadratic Inequalities (Visual Explanation)
Lec 47 - Introduction to functions
Lec 52 - Proof: log a + log b = log ab
Lec 53 - Proof: A(log B) = log (B^A), log A - log B = log (A/B)
Lec 54 - Proof: log_a (B) = (log_x (B))/(log_x (A))
Lec 55 - Algebraic Long Division
Lec 56 - Introduction to Conic Sections
Lec 57 - Conic Sections: Intro to Circles
Lec 58 - Conic Sections: Intro to Ellipses
Lec 59 - Conic Sections: Intro to Hyperbolas
Lec 60 - Conic Sections: Hyperbolas 2
Lec 61 - Conic Sections: Hyperbolas 3
Lec 64 - Conic Identification 3
Lec 67 - Proof: Hyperbola Foci
Lec 68 - Partial Fraction Expansion 1
Lec 69 - Partial Fraction Expansion 2
Lec 70 - Partial Fraction Expansion 3
Lec 71 - Parabola Focus and Directrix 1
Lec 72 - Focus and Directrix of a Parabola 2
Lec 73 - Two Passing Bicycles Word Problem
Lec 74 - Passed Bike Word Problem
Lec 76 - Overtaking Word Problem
Lec 77 - Early Train Word Problem
Lec 79 - Rational Inequalities
Lec 80 - Rational Inequalities 2
Lec 81 - Interesting Polynomial Coefficient Problem
Lec 82 - Geometric series sum to figure out mortgage payments
Lec 83 - Introduction to Function Inverses
Lec 84 - Function Inverse Example 1
Lec 85 - Function Inverses Example 2
Lec 86 - Function Inverses Example 3
Lec 87 - Direct and Inverse Variation
Lec 88 - Recognizing Direct and Inverse Variation
Lec 89 - Recognizing Odd and Even Functions
Lec 90 - Connection between even and odd numbers and functions
Lec 91 - New Operator Definitions
Lec 93 - Alternate Proof to Induction for Integer Sum