Brightstorm / High School / Math
Lecture : Solving a System of Linear Equations in Two Variables
By Multiple Instructors | Algebra II
Lecture 31 of 151
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 More Lectures - Select Lecture...1 : Introduction to Real Numbers2 : Analyzing Data3 : Properties of Real Numbers4 : Solving Linear Equations5 : Solving for a Parameter in a Linear Equation6 : Solving for a Parameter in an Applied Linear Equation7 : Applied Linear Equations: Geometry Problem8 : Applied Linear Equations: Mixture Problem9 : Applied Linear Equations: Investment Problem10 : Applied Linear Equations: Tax Problem11 : Applied Linear Equations: Distance Problem12 : Applied Linear Equations: Collection Problem13 : Solving Linear Inequalities14 : Solving a Three-part Linear Inequality15 : Applied Linear Inequalities16 : Set Operation: Union17 : Set Operation: Intersection18 : Solving Absolute Value Equations19 : Solving "Greater Than" Absolute Value Inequalities20 : Solving "Less Than" Absolute Value Inequalities21 : Rectangular Coordinate System22 : Midpoint Formula23 : Point-Slope Form of a Line24 : Standard Form of a Line25 : Introduction to Functions26 : Domain and Range27 : Function Notation28 : Direct Variation29 : Indirect Variation30 : Joint and Combined Variation31 : Solving a System of Linear Equations in Two Variables32 : Solving a Linear System in Three Variables with a Solution33 : Solving a Linear System in Three Variables with no or Infinite Solutions34 : Solving an Applied System of Linear Equations35 : Introduction to Matrices36 : Matrix Operations37 : Augmented Matrices38 : Matrix Multiplication39 : Rules of Exponents40 : Scientific Notation41 : Introduction to Polynomials42 : Polynomial Function43 : Basic Polynomial Graphs44 : Basic Transformations45 : Multiplying Polynomials46 : Multiplying Complicated Polynomials47 : Pascals Triangle48 : Binomial Theorem49 : Dividing Polynomials using Long Division50 : Dividing polynomials using Synthetic Division51 : Using Synthetic Division to Evaluate Polynomials52 : Composition of Functions53 : Review of the Methods of Factoring54 : Factoring the Sum or Difference of Cubes55 : Factoring Complicated Expressions56 : Using Synthetic Division to Factor57 : Solving by Factoring58 : Rational Roots Theorem59 : Using Synthetic Division to Solve an Equation60 : Definition and Domain of a Rational Expression61 : Multiplying and Dividing Rational Expressions62 : Adding and Subtracting Rational Expressions63 : Simplifying Complex Fractions64 : Solving a Rational Equation65 : Graphing a Rational Expression66 : Solving a Rational Equation for a parameter67 : Introduction to Radicals68 : Radicals and Absolute Values69 : Rational Exponents70 : Evaluating Rational Exponents71 : Rational Exponents with Negative Coefficients72 : Rules for Rational Exponents73 : Simplifying Radicals using Rational Exponents74 : Multiplying Radicals of the Same Root75 : Multiplying Radicals of Different Roots76 : Rationalizing the Denominator with Higher Roots77 : Rationalizing a Denominator with a Binomial78 : Solving an Equation with Radicals79 : Solving an Equation with a Rational Exponent80 : Introduction to Imaginary Numbers81 : Multiplying Complex Numbers82 : Dividing Complex Numbers83 : Powers of i84 : Deriving the Quadratic Formula85 : Overview of the Different Methods of Solving a Quadratic Equation86 : The Discriminant of a Quadratic Equation87 : Solving a Rational Equation that Results in a Quadratic88 : Solving a Distance-Rate-Time Problem that results in a Quadratic89 : Solving a Quadratic Equation in Function Notation90 : Solving Quadratic Equations in Disguise91 : Introduction to Parabolas92 : Finding Intercepts, Domain, Range and Vertex of a Parabola93 : Finding the Maximum or Minimum of a Quadratic94 : Graphing a Horizontal Parabola95 : Graphing a Quadratic Inequality96 : Solving Rational Inequalities using a Sign Chart97 : Focus and Directrix of a Parabola98 : Finding an Inverse Algebraically99 : Proving Two Functions are Inverses100 : Finding an Inverse Graphically101 : Exponential Functions and their Graphs102 : Solving Exponential Equations with the "Same" Base103 : Introduction to Logarithms104 : Solving Simple Logarithmic Equations105 : Function Notation with Logs and Exponentials106 : Graph of Logarithmic Functions107 : Product Rule of Logarithms108 : Quotient Rule of Logarithms109 : Power Rule of Logarithms110 : Expanding Logarithms111 : Condensing Logarithms112 : Evaluating a Logarithmic Expression in terms of Known Quantities113 : Common and Natural Logarithms114 : Change of Base Formula115 : Solving Exponential Equations with the Different Bases116 : Solving a Logarithmic Equation117 : Compound Interest (Finite Number of Calculations)118 : Compound Interest (Continuously)119 : Exponential Growth and Decay120 : Introduction to Conic Sections121 : The Circle122 : The Ellipse123 : The Hyperbola124 : Transformations of a Hyperbola125 : Conic Section Formulas126 : Functions Defined by Radicals127 : Solving a System of Nonlinear Equations by Substitution128 : Solving a System of Nonlinear Equations by Elimination129 : Graphing a Nonlinear Inequality130 : Introduction to Sequences131 : Series and Summation Notation132 : Arithmetic Sequences133 : Arithmetic Series134 : Geometric Sequences135 : Geometric Series136 : Recursion Sequences137 : Mathematical Induction138 : Fundamental Counting Principal139 : Permutations140 : Combinations141 : Combinations vs. Permutations142 : Probability of Multiple Events143 : Probability of Independent Events144 : Using the Complement to Calculate Probability145 : Probability of Dependent Events146 : Conditional Probability147 : Step Function148 : Using the Calculator149 : Common Algebra II Mistakes150 : Piecewise Functions151 : Circle Tic Tac Toe Fun

Course Description
Brightstorm offers online video tutorials that help high school students with the classes they take in school. Talented teachers break down each lesson to make it easier to understand all the key concepts, leading to improved grades and more confidence in school. Courses include interactive quizzes, practice problems and study guides to provide immediate homework help and will ensure you are ready for your next test, essay or the SATs.
Courses Index
1 : Algebra I Review - High School   (Salman Khan / Khan Academy)
2 : Geometry   (Multiple Instructors / Brightstorm)
4 : Geometry – Worked Examples   (Salman Khan / Khan Academy)
5 : Fundamentals of Geometry   (James Sousa / MathIsPower4U)
6 : Algebra II – 10th grade   (Derek Owens / Derek Owens)
7 : Algebra I - Martin Gay Textbook   (Julie Harland / MathGal)
8 : Algebra II - 2008 Prentice Hall Algebra 2 Textbook   (Brad Robb / WowMath)
9 : Algebra II – Worked Examples   (Salman Khan / Khan Academy)
10 : Algebra II - Worked Problems   (Brad Robb / WowMath)
11 : Pre-Calculus   (Multiple Instructors / Brightstorm)