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Linear inequalities
Exploring a world where both sides aren't equal anymore!

Compound and absolute value inequalities

You're starting to get comfortable with a world where everything isn't equal. In this tutorial, we'll add more constraints to think of at the same time. You may not realize it, but the ability to understand and manipulate compound and absolute value inequalities is key to many areas of science, engineering, and manufacturing (especially when tolerances are concerned)!

Structure in linear expressions

Algebra isn't just some voodoo concocted to keep you from running outside. It is a way of representing logic and manipulating ideas. This tutorial will have blood flowing to your brain in record quantities as you actually have to think about what the algebraic expressions and equations actually mean!