Sophia Learning
Sophia: Scalar Multiplication: Lesson 1
This brief lesson will introduce scalars, and demonstrate how to perform scalar multiplication with matrices. It is 1 of 10 in the series titled "Scalar Multiplication."
Sophia Learning
Sophia: Singular and Non Singular Matrices: Lesson 3
This lesson introduces the notion of a singular matrix and provides a shortcut to determine whether or not a given 2x2 matrix is singular. It is 3 of 5 in the series titled "Singular and Non-Singular Matrices."
Sophia Learning
Sophia: Using Determinants to Classify 3x3 Matrices: Lesson 3
This lesson demonstrates how the determinant of a 3x3 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Add and Subtract Matrices
Find a quick, concise explanation of how to add and subtract matrices. Step by step examples are included to help you understand how to find the sum or difference of matrices of the same dimensions.
Varsity Tutors
Varsity Tutors: Hotmath: Inverse of a Matrix
Find a concise explanation of the inverse of a matrix. An example is given and clearly explained.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Matrices
Find a quick, concise explanation of matrices. Examples are given and clearly explained.
ClassFlow
Class Flow: Adding and Subtracting Matrices
[Free Registration/Login Required] This lesson covers adding, subtracting matrices and equivalent matrices.
ClassFlow
Class Flow: Inverse Matrices and Systems
[Free Registration/Login Required] This flipchart shows students how to solve systems of equations using inverse matrices for real-world problem situations.
ClassFlow
Class Flow: Organizing Data in Matrices
[Free Registration/Login Required] This lesson looks at organizing data into a matrix, as well as identifying the different elements in a matrix.
ClassFlow
Class Flow: Transforming Matrices
[Free Registration/Login Required] This is a lesson on transforming, rotating and dilating matrices.
Interactive Mathematics
Interactive Mathematics: Matrices
This over view of matrices begins with an application to electronics using circuit equations. Examples are provided to demonstrate types of matrices, the identity matrix, addition and scalar multiplication of matrices.
Interactive Mathematics
Interactive Mathematics: Multiplication of Matrices
A demonstration of matrix multiplication is presented through several detailed examples. Explanations of how the commutative law works only on the identity and inverse matrices are also included.
Interactive Mathematics
Interactive Mathematics: Matrices and Linear Equations
Examples are provided to demonstrate how to use matrices to solve 2x2 and 3x3 matrices. Examples include real world applications and some are interactive.
Sophia Learning
Sophia: Using Determinants to Classify 2x2 Matrices: Lesson 2
This lesson demonstrates how the determinant of a 2x2 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Harvard University
Substitution Matrices: Harvard University
Substitution matrices can be used to align two protein sequences.
Purple Math
Purplemath: Systems of Linear Inequalities
This Purplemath lesson describes how to solve a system of linear inequalities by graphing.
Purple Math
Purplemath: Introduction to Matrices / Matrix Size
Purplemath gives the fundamentals of matrices. Begins with linear equations of three variables and shows the corresponding matrix. Discusses the augmented and coefficient matrix formed from the equation. The size of a matrix and special...
Purple Math
Purplemath: Determinant Word Problems
Matrix determinants can be used to solve many algebra and geometry word problems. Among them: finding the area of a triangle, finding the area of a parallelogram, and finding the equation of a line between two points. These three...
Purple Math
Purplemath: Determinants
A complete lesson on matrix determinants is offered here. From explanation of what a determinant is to how to find the determinant of a 2x2 or 3x3 matrix. Steps are written in and shown for the student or teacher's use. Also provided are...
University of St. Andrews (UK)
University of St. Andrews: Matrices and Determinants
This resource explains determinants as related to mathematics and the history of determinants.
University of St. Andrews (UK)
University of St. Andrews: History of the Matrix
This educational site from the University of St. Andrews contains information regarding the origins of the matrix. Some samples of the types of matrices used back in the earlier days are provided.
Math Aids
Math Aids: Algebra 2 Worksheets
Great resource to practice and strengthen math skills pertaining to Algebra 2. Math worksheets are printable, may be customized, and include answer keys.