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Khan Academy
Khan Academy: Algebra: Testing Solutions for a System of Inequalities
This video demonstrates how to take a given point and test if it is a solution for a system of inequalities by using substitution. [1:15]
Khan Academy
Khan Academy: Algebra: Graphing Systems of Inequalities 2
This video demonstrates how to find the solution set for a system of three linear inequalities. [3:24]
Khan Academy
Khan Academy: Algebra: Graphical System of Inequalities
This video demonstrates how to graph the solution set for a system of linear inequalities. [5:36]
Khan Academy
Khan Academy: Testing Solutions for a System of Inequalities
This video demonstrates how to take a given point and test if it is a solution for a system of inequalities by using substitution.