​Evaluating Expressions

• ​Constants - do not vary

• ​Variables - vary

• ​An algebraic expression is a collection of constants and variables joined together by the algebraic operations of addition, subtraction, multiplication, and division.

​Simplifying Algebraic Expressions

• ​Use the properties of real numbers.

• ​Only like terms can be combined.

• ​What do I mean by like terms?

• ​Let's do a couple together to feel comfortable with the process.