How to solve inequalities that use the word "and" or "or."
How to solve linear inequalities.
How to solve a three part inequality.
How to graph inequalities in the xy plane.
How to solve an inequality with an absolute value greater than a number.
How to solve an inequality with an absolute value less than a number.
How to find a test score to keep the class grade at least 90%.
How to find the domain of a function when it has rational or radical expressions.