Exponents, Writing Expressions and Parts of an Expression

Identify a constant in the expression
3x + 2y + 7

• 3
• 2y
• 7
• 2

How many terms are in the expression
3x + 2y + z

• 5
• 2
• 4
• 3

Identify the variables in the expression
3x +  9

• x
• y
• 9
• 3x

How many coefficients are in expression?

• 1
• 2
• 3
• 4

A number, variable or product is called a ________.

• term
• coefficient
• variable
• product

A symbol for a number we don't know yet. This is usually a letter.

• coefficient
• sum
• variable
• term

Name the underlined part of the expression. 21 + g - 5h

• term

• variable

• constant

• coefficient

Select all that apply. An expression can contain ...

• coefficients

• variables

• an equal sign

• constants

A coefficient can be defined as?

• a letter that represents an unknown number

• a number

• the number in front of a letter

• part of an expression

Write the following in expanded form. 
10³

• 10+10+10
• 10x10x10
• 3x10
• 1,000