Expressions Review

Simplify the expression: 
4a + 9 + a

• 5a + 9
• 14a
• 3a + 9
• 5a - 9

Simplify the expression: 
x+5+2x+10

• 3x+15
• x-5
• 18x

Simplify the expression: 
3m-7m-m

• -5m
• -11m
• 21m
• 5m

Simplify the expression: 
3+2c-4c-9+11c

• -9c+6
• 12+3c
• 9c-6
• -12-3c

A number (NO variable)

• variable

• coefficient

• constant

A group of numbers and/or variables separated by + or -

• coefficient

• term

• constant

A letter that represents a number

• term

• variable

• constant

The number in front of a variable

• expression

• constant

• coefficient

Terms whose variables (letters) are the same

• like terms

• constant

• expression

What is the variable in the following expressions?

3h + 2

• 3

• h

• 2