Students explore cryptology. They write a research paper on cryptography. Using linear equations, students invent a code and write a secret message. Students complete cryptography puzzles.

[Free Registration/Login may be required to access all resource tools.] This lesson covers using a matrix equation to solve a system of linear equations.

Represent systems of two linear equations with matrix equations by determining A and b in the matrix equation A*x=b. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

This site gives information on linear equations and matrices. Among the topics discussed are the substitution method, Gauss-Jordan Elimination Method, matrix operations, matrix multiplication, and inverse matrices.

Inverse matrices are very useful for solving matrix equations. But, given a matrix, how do you invert it? How do you find the inverse? The technique for inverting matrices is kind of clever. For a given matrix A and its inverse A-1, we...

Hotmath provides 21 practice problems dealing with systems of equations and inequalities. Each of the practice problems include a step-by-step guide for solving their algebraic problem.

This Computer Algebra System (CAS) activity encourages students to investigate addition, subtraction, and multiplication of matrices. They find the inverse of a matrix. Students also solve a set of linear equations by using matrices.

The topic summary outlines matrix algebra. Some topics reviewed are operations with matrices, matrix inverse, and algebra of matrices. The resource consists of definitions, notes, and examples.

[Free Registration/Login may be required to access all resource tools.] This lesson covers using a graphing calculator and matrices to solve a system of equations.

[Free Registration/Login Required] This flipchart shows students how to solve systems of equations using inverse matrices for real-world problem situations.

[Free Registration/Login may be required to access all resource tools.] This lesson covers solving systems of equations using Cramer's Rule.

This site from the Richland Community College provides the detailed lecture notes to a college algebra course, complete with equations and definitions. Content ranges from "functions and their graphs" to "conics and parametric equations."