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# U2L1: Using Variable

### Lesson 1: Using Variables, Exponents, and Order of Operations

TermDefinition
Variable a symbol used to represent an unspecified number or value
Coefficient a number multiplied to a variable or exponent, ex. 3 is the coefficient of 3x.
Factors quantities being multiplied
Quantity anything that can be measured or counted
Exponent a symbol (number) that indicates the number of times the based is used as a factor (a base is multiplied)
Simplify write a mathematical expression in its simplest form (without solving in terms of variables)
Evaluate to find the value of an expression
Expression a numerical sentence that consists of one or more numbers and variables along with one or more arithmetic operations
Formula an expression used to calculate a desired result
Created by: arouson