Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Partial Quotient Method of Division 2
This video shows an example of multi-digit partial quotient division. Practice problems are available. [7:56]
Khan Academy
Khan Academy: Linear Algebra: Distributive Property of Matrix Products
Video shows that the distributive property is true for multiplying matrices. [9:52]
Khan Academy
Khan Academy: Linear Algebra: Matrix Vector Products as Linear Transformations
Video first shows that matrix vector multiplication is another way to represent a transformation and then shows that matrix vector products are linear transformations. Relates vector transformations to video game graphics. This video...
Khan Academy
Khan Academy: Linear Algebra: Matrix Vector Products as Linear Transformations
Video first shows that matrix vector multiplication is another way to represent a transformation and then shows that matrix vector products are linear transformations. Relates vector transformations to video game graphics. This video...
Khan Academy
Khan Academy: Biology: Cytotoxic T Cells
The role of cytotoxic T cells and how they terminate cells infected with viruses. [10:06]
Khan Academy
Khan Academy: Biology: Oxidation and Reduction From Biological Point of View
Understanding the chemistry functions of oxidation and reduction from a biologist's point of view. [13:29]
Khan Academy
Khan Academy: Chemistry: Ideal Gas Equation Example 4
Need some more examples of how to solve problems using the ideal gas law? Here is a video lecture that does just that! In this video, a problem is worked step-by-step to solve for the molar mass of an unknown molecule at STP. [5:03]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Associative Law of Addition
This video explains the associative law of addition by writing an expression in a different way. Practice problems are available. [2:10]
Khan Academy
Khan Academy: Calculus: 2011 Calculus Ab Free Response #4B
Video shows how to determine the absolute maximum of a function over an interval by finding the value of the function at both ends of the interval and at any critical values. [13:15]
Khan Academy
Khan Academy: Algebra: Multiplying and Dividing Monomials 1
Video demonstrates how to express the area of a rectangle with given dimensions as a monomial. [1:52]
Khan Academy
Khan Academy: Algebra: Systems of Three Variables
This video demonstrates how to solve a system comprised of three equations in three variables. [8:23]
Khan Academy
Khan Academy: Differential Equations: Exact Equations Example 1
Video first gives example of determining if an equation is an exact equation and then shows how to solve it. [12:09]
Khan Academy
Khan Academy: Algebra: Logarithm of a Power
Explains the property of a logarithm of a power that states the log base b of m to the n power is equal to n times log base b of m. [4:49]
Khan Academy
Khan Academy: Geometry: Common Orthocenter and Centroid
Proves that if the orthocenter and centroid are the same point in a triangle then the triangle is a right triangle. [6:25]
Khan Academy
Khan Academy: Linear Algebra: Linear Transformations as Matrix Vector Products
Video first introduces the identity matrix and shows that when any vector is multiplied by the identity matrix the result is the original vector. Also shows that the columns of the identity matrix are called the standard basis for R^n....
Khan Academy
Khan Academy: Linear Algebra: Linear Transformations as Matrix Vector Products
Video first introduces the identity matrix and shows that when any vector is multiplied by the identity matrix the result is the original vector. Also shows that the columns of the identity matrix are called the standard basis for R^n....
Khan Academy
Khan Academy: Trigonometry: Law of Cosines
This is a video showing how to derive the law of cosines. [9:27]
Khan Academy
Khan Academy: Linear Algebra: Introduction to Eigenvalues and Eigenvectors
Video defining eigenvectors as scaled vectors and eigenvalues as their scale value and explaining their significance. Video references the example from a previous video about changing coordinate systems to make finding the transformation...
Khan Academy
Khan Academy: Linear Algebra: Transformation Matrix With Respect to a Basis
Video discussing transformation matrices and how a vector is able to be mapped to the same resulting vector by using a transformation matrix with respect to the standard basis as well as one with respect to a different basis. Reviews how...
Khan Academy
Khan Academy: Linear Algebra: Cross Product Introduction
Video explains the vector cross product and gives examples of finding it. Also discusses the usefulness and limitations of vector cross products and the differences from the dot product. [15:47]
Khan Academy
Khan Academy: Algebra: Sum of Logarithms With Same Base
Demonstrates how to apply the logarithm property regarding the sum of logarithms with the same base to simplify a logarithmic expression. [5:04]
Khan Academy
Khan Academy: Linear Algebra: Linear Subspaces
Video defines a vector subspace by its three criteria: containing the zero vector, closure under scalar multiplication and closure under vector addition. Gives examples of vector sets and testing to see if they are vector subspaces. Then...
Khan Academy
Khan Academy: Algebra: Inequalities Using Multiplication and Division
Video demonstrates through several examples how to solve inequalities using multiplication and division of positive and negative numbers. Practice problems available. This video is also found in the strand Algebra: ck12.org. [10:27]
Khan Academy
Khan Academy: Calculus: 2011 Calculus Ab Free Response #1A
Video shows how to determine whether the speed of a particle is increasing or decreasing at a given time by using the velocity and acceleration functions and reasoning about the signs of the functions when evaluated at the given time....