Name__________________________________________________________Date_____________
Course 2
2.1 Evaluating and Writing Algebraic Expressions
Objective 1: Evaluating Algebraic Expressions
A _________________________ is a symbol that represents one or more numbers
(they are usually letters).
An ______________________________________ is a mathematical phrase with at least
one variable.
Variable
Algebraic expressions
g
z
13 – g
x
𝑧
2
3x + 8
The value of an algebraic expressions varies, or changes, depending on the
value of the variable.
Objective 2: Writing Algebraic Expressions
You can use algebraic expressions to describe data. Suppose your heart beats
72 times in one minute. You can write an expression for the number of times
it beats in any number of minutes.
Let m represent the number of minutes.
72m
The algebraic expression represents the heartbeats in m minutes
Writing Word Phrases:
Write a word phrase for each algebraic expression:
a) 5 + n
𝑝
b) 3
c) C – 50
Solve: Each of the nine students in the club is going to
hang t posters. Write an algebraic expression for the total
number of posters the students will hang.