Learn how to compose two linear functions. To compose two functions means to express one of the functions as a function of ...

Learn how to solve two step linear equations. A linear equation is an equation whose highest exponent on its variable(s) is 1 ...

Learning linear equations or the functions of cells, especially if it doesn’t come easily, requires a generous dose of motivation. But this intangible quality can be difficult to cultivate. There are ...

Grade school math students are likely familiar with teachers admonishing them not to just guess the answer to a problem. But a new proof establishes that, in fact, the right kind of guessing is ...