1. 3.5 Variables and Expressions
Variable- an unknown number usually represented by a letter.
a, n, x, or y

2. Variable expression- contains at least one variable that describes word phrases.
n x ÷ 9
Evaluate- replacing the variable with a number in a variable expression.
Value- the number of a variable

3. Write a variable expression:
a. eight more than a number
b. five less than a number
c. A number divided by three
d. Five more than three times a number

4. Write a variable expression:
a. eight more than a number
n + 8
b. five less than a number
n - 5
c. A number divided by three
n ÷ 3
d. Five more than three times a
number
3n + 5

5. Evaluate each expression:
Let x=2, y=3, z=-2
a. X b. 18 ÷ y
c. 2x + z d. 5y – 2x

6. Evaluate each expression:
Let x=2, y=3, z=-2
a b. 6
c d. 11

7. Write an expression:
C pens shared equally among 4 boys.
D dollars more than $7.00.
T movie tickets at $8.00 each.

8. Write an expression:
C pens shared equally among 4 boys.
C ÷ 4
D dollars more than $7.00.
7 + d
T movie tickets at $8.00 each. 8t