Review for 8.1

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

3x-5x

• 2x
• 8x
• -2x
• 15x²

Like terms have the same _____ and the same _____.

• variables and numbers
• signs and numbers
• variables and exponents
• variables and signs

A constant term has ______.

• no exponents
• no variables
• no numbers
• no letters

A coefficient is __________.

• the variable
• a constant
• an exponent
• the number that comes before the variable

How many terms does this expression have?
3x + 5y - 17 - 2y + x

• 3
• -17
• 5
• 1

Simplify by combining like terms.
m + 9 - 4m

• 5m
• m + 5m
• -3m + 9
• 4m

What is the coefficient here?
-27m + 5

• 27
• -27
• 5
• m

a + a + a + a

• a + 4 
• 4a 
• a to the fourth power 
• 4a + 4 

y + x + y + y + x 

• 2 + 3 
• x + y 
• 2x + 3y 
• 5xy