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Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
Paul's Online Math Notes
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Need help solving systems of linear equations? In this video, a Tutor.com algebra tutor uses the substitution method to solve a system of linear equations, and shows you how to use graphing to make sure you don’t get tricked by systems of parallel lines that have no solution. You’ll graph the linear equations, find their point of intersection, solve them using substitution, and check your work to make sure it all makes sense.
Tutor.com
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This site provides graphing tools. The GCalc 3 menu has several options for graphing. One nice aspect of this site is that multiple functions can be graphed in different colors on the same screen. Another useful feature is that it is easy to copy and paste or print the graphs that are generated.
GCalc - Java Online Graphing Calculator
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How to solve equations with absolute value in variables
SOS Math
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Some worked example problems that point out many common errors students make when solving them.
Pauls Online Math Notes
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The perfect study site for high school, college students and adult learners. Get help to do your homework, refresh your memory, prepare for a test, ....
SOS math
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In this Early Edge video lesson, you'll learn more about Two-Step Equations, so you can be successful when you take on high-school Math & Algebra.
The Princeton Review
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Explains the difference between inconsistent, dependent and independent systems.
algebra.com
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A different way to solve linear systems. Shows the procedure step by step. Had a student who needed help with this and I just learned it from the website.
Systems of Linear Equations and Gaussian Elimination
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