1. Write the algebraic expression Substitute values for the variables
To evaluate an algebraic expression:
A letter that is used to represent one or more numbers
A collection of numbers, variables, operations and grouping symbols.
Write the algebraic expression
Substitute values for the variables
Simplify the numerical expression

2. Algebraic expressions are often used to model real-life quantities
Algebraic expressions are often used to model real-life quantities. You can translate a verbal model into an algebraic model by using labels. Algebraic models are sometimes called formulas.
Verbal Model Labels Algebraic Model
5. Evaluate the formula
6. A rover driving on the moon’s surface travels at a speed of 60ft/min. How far will it travel in 90 min?
The area of a rectangle is the product of its length and its width.
The distance traveled is the product of the rate and the time.
P = 2l + 2w
when l = 4 and w = 6