Unit 3 Review

A letter or symbol that represents an unknown quantity is a(n) ___________.

• Coefficient

• Exponent

• Variable

Look at the variables in the expression below. Choose YES if the terms of each expression are like terms. Choose NO if they are NOT like terms.

3a + 3z

• YES

• NO

Look at the variables in the expression below. Choose YES if the terms of each expression are like terms. Choose NO if they are NOT like terms

4j - j + 3.8j

• YES

• NO

How many terms are in the following expression?

28y + 5z x 6

How many terms are in the following expression?

2a x 4 x 67

How many terms are in the following expression?

8y - 3 + 5z x 2

Write the expression using an exponent.

8 x 8 x 8 x 8 x 8 x 8 x 8

Evaluate the expression.

9²

Evaluate the expression.

80 - 4² ÷ 8

Evaluate the expression.

[20 + (2.5 x 3)] - 3³

• 0.5

• 40.5

• 18.5

• 58.5