In a series of practice problems, learners use the addition or subtraction method to solve systems of linear equations, also called "simultaneous linear equations."

Learners study the properties of a rectangular solid and use geometric formulas to find volume and surface area.

Learners read definitions of the terminology associated with algebraic operations and then follow steps to simplify algebraic expressions.

In a series of practice problems, learners use the addition or subtraction method to solve systems of linear equations, also called "simultaneous linear equations."