In this module, you’ll learn how to use linear equations to model real-world situations and explore several specific types of equations. You’ll also define a process for translating inequalities stated in words and symbols or as graphs on the number line into a special kind of notation called interval notation. Before beginning, it will be helpful to refresh techniques for eliminating denominators from rational equations in one variable, and see some formulas that commonly occur during modeling and learn how to manipulate them. A review of representing inequalities using words and symbols and as graphs on the number line is also included in this section.

Warm up for this module by refreshing important concepts and skills you’ll need for success. As you study these review topics, recall that you can also return to Algebra Essentials any time you need to refresh the basics.