This site gives an example of solving a system of equations with the use of Gaussian Elimination.

This site provides a detailed unit on finding the slope of lines that investigates methods for solving systems of equations. Good lesson plan for class.

This Purplemath lesson provides formulas, equations, graphs and explanations of systems of equations.

This site from the University of St. Andrews provides a biographical account of the life of Gottfried Wilhelm von Leibniz. Includes links to mathematics topics such as matrices and determinants, quadratic, cubic and quartic equations, etc.

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...

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.

[Free Registration/Login may be required to access all resource tools.] This lesson shows you how to determine if two matrices can be multiplied together and explains that the commutative property does not apply.

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

This lesson explains how the determinant is used for Cramer's Rule.

Students explore the inverse of a square matrix. Topics examined are the inverse of a real number, using inverses to solve systems, and the determinant of a 2 x 2 matrix. Class notes and examples are included.

Using determinants and Cramer's Rule, systems of two and three variables are solved step by step. Several examples are presented to demonstrate how Cramer's Rule is used.

[Free Registration/Login may be required to access all resource tools.] Solve a system and use the result as a guide to identify its type.

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...

This resource explains determinants as related to mathematics and the history of determinants.

This Purplemath lesson describes how to solve a system of linear inequalities by graphing.

A "minor" is the determinant of the square matrix formed by deleting one row and one column from some larger square matrix. To find the determinant of the matrix A, you have to pick a row or a column of the matrix, find all the cofactors...

Two methods are demonstrated for finding the inverse of a matrix. The examples are detailed and easy to follow. Several interactive examples are also provided.

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 1 of 5 in the series titled "Singular and Non-Singular Matrices."

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."

The online course consists of educational materials about calculus with several variables. Lecture notes, syllabus, exams, and assignments with solutions are included.

Participate in this exercise to determine where an assessment fits on the Hess' Cognitive Rigor Matrix.

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."

Dozens of statistical terms are defined and illustrated in this glossary.

In this set of questions, students will find the x-intercepts of a polynomial function, factor a polynomial, and determine the number of solutions of a polynomial equation. Questions are multiple choice and true/false; solutions are...