7.1.3 Algebraic Expressions

Definitions

• Variable --> A symbol (often a letter) that represents an unknown quantity
• Algebra --> Branch of mathematics that involves expressions with variables
• Algebraic Expressions --> Contains variables, numbers, and at least one operation
• Coefficient --> The numerical factor of a multiplication expression that contains a variable
• Define a Variable --> Choosing a variable to represent an unknown quantity

In the example above, the 9 and the 6 are examples of coefficients.