eBook
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Palmer Inedependent School District: Linear Inequalities in Two Variables [Pdf]

For Students 9th - 10th Standards
A set of example problems and exercises on linear inequalities in two variables. Includes how to write them using a graph or a table of values.
eBook
Washington State University

Washington State University: Math 101: Solving Linear Inequalities

For Students 9th - 10th Standards
This page covers topics involving linear inequalities including properties used to solve inequalities, how to write solutions, solving simple inequalities, and solving compound inequalities.
Unknown Type
Khan Academy

Khan Academy: Compound Inequalities

For Students 9th - 10th
Solve compound linear inequalities. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.