Variables and Unknowns Videos - Free Educational Videos for Students in K - 12


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This page provides a list of educational videos related to Variables and Unknowns. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Variables and Unknowns.


Expressions with unknown variables 2


By Khan Academy

A few more examples where Sal evaluates expressions with multiple unknown variables.

      Expressions with unknown variables


      By Khan Academy

      Sal solved a few examples where we need to evaluate an expression, but we don't know the individual variable values.

          Algebra Basics: What Is Algebra? - Math Antics


          By Lumos Learning

          This video gives an overview of Algebra and introduces the concepts of unknown values and variables. It also explains that multiplication is implicit in Algebra.

              Identifying the Equation and Solution to a Two-Step Problem: 3.OA.8


              By Tenmarks Amazon

              Presents a two-step word problem involving one or two of the four operations. An equation is written with a variable for the unknown value.

                  Introduction to Random Variables - Khan Academy


                  By Khan Academy

                  This video lecture series from Khan Academy on Probability includes Introduction to Probability, Permutations, Combinations, Probability using Combinations, Conditional probability, Introduction to Random Variables, Probability Density Functions, Binomial Distribution, Expected Value, Expected value of Binomial Distribution, Poisson Process, Law of Large Numbers

                      Graphing - Independent Dependent Variables


                      By MrG Lewis

                      Learn how to graph independent and dependent variables in this video from Mr G Lewis

                          Expressions and variables


                          By MathPlanetVideos

                          Evaluate the expression when x=4 and y=3 5x+y2−xy

                              Mean and Expected Value of Discrete Random Variables


                              By statslectures

                              This video summarizes for us in less than two minutes how to find the expected value for a discrete random variable. In order to apply this to empirical data, form a histogram from your data and use that to determine relative frequencies.

                                  Example 3: Finding the square of a binomial with two variables | Algebra I | Khan Academy


                                  By Khan Academy

                                  This Khan Academy video offers more information on special products and contains a few samples with a step-by-step walkthrough on these new concepts.

                                      Example 6: Subtracting polynomials with two variables | Algebra I | Khan Academy


                                      By Khan Academy

                                      Example 6: Subtracting polynomials with two variables | Algebra I | Khan Academy

                                          Independent and Dependent Variables - YourTeacher.com


                                          By yourteachermathhelp

                                          This video briefly explains the difference between an independent and dependent variable using the example of the length of your hair based on how many days it has been since you got a hair cut.

                                              Example 3: Finding the square of a binomial with two variables | Algebra I | Khan Academy


                                              By Khan Academy

                                              This Khan Academy video offers more information on special products and contains a few samples with a step-by-step walkthrough on these new concepts.

                                                  Example 6: Factoring a difference of squares with two variables | Algebra II | Khan Academy


                                                  By Khan Academy

                                                  Khan Academy presents Example 2: Factoring difference of squares, an educational video resource on math.

                                                      Evaluating Expressions with Two Variables - Khan Academy


                                                      By Khan Academy

                                                      Sal Khan shows the viewer how to evaluate an expression with two variables.

                                                          Linear Equations in Two Variables


                                                          By Meritnation

                                                          YouTube presents Linear Equations in Two Variables, an educational video resource on math.

                                                              Solving systems of equations in three variables


                                                              By MathPlanetVideos

                                                              Solve the systems of equation in our example.

                                                                  Equations with variables


                                                                  By MathPlanetVideos

                                                                  Solve the following equation 8⋅x−x=21

                                                                      Solving systems of equations in two variables


                                                                      By MathPlanetVideos

                                                                      Solve the system of equations: {2x−4y=0 −4x+4y=−4

                                                                          Add and subtract polynomials with two variables


                                                                          By Khan Academy

                                                                          Sal simplifies (4x^2y - 3xy + 25) - (9y^2x + 7xy - 20).

                                                                              Mean E(X) and Variance Var(X) for Continuous Random Variables : ExamSolutions


                                                                              By ExamSolutions

                                                                              If we took the same approach to finding the expected value for a continuous random variable as we took for a discrete random variable, we would have to sum up an infinite number of terms. Fortunately, we have the field of calculus to help us with what would otherwise be an insurmountable task. This video shows us how we can use integrals to find the expected value of a continuous random variable. This video also goes over finding the variance of a continuous random variable, which requires the use of the expected value itself. The basic skill set is the same, though, so it might be valuable to watch as well.