Algebra Review

A ________ is a letter used to represent an unknown number.

• equation

• algebraic expression

• variable

• inequality

Which symbols might be use in an inequality?

• >

• =

• #

• <

Which of the following is an example of an equation?

• 5n

• 13 + x = 15

• 3x > 6

• 12 - 8

Which of the following is an example of an inequality?

• 5n

• 13 + x = 15

• 3x > 6

• 12 - 8

Which of the following is an algebraic expression?

• 2 + 4

• 4 - 2

• 4 ÷ 2

• 4y + 2

Simplify:

7s - 3s + s

Simplify:

9s + 8 - 5 + s

• 13s

• s - 4

• 10s + 3

• 8s - 3

Evaluate when m = 5.

5m +3

• 13

• 28

• 25

• 20

Evaluate when m = 7.

m + 12

6n means:

• 6 x n

• 6 - n

• 6 ÷ n

• 6 + n