Algebra- like terms, unlike terms, expressions

We can add and subtract only _____ terms.

• Like Terms

• Unlike Terms

• Both

Simplify the following expression:
2x - 9 - 2x

• -4x - 9
• 9
• -9
• 4x - 9

Simplify the following expression:
-6 + 2x + 6

• 12 + 2x
• 2x - 12
• -2x
• 2x

Simplify:
3x + 2x + 3y - 7y

• 5x + 10y
• 5x + 4y
• 5x - 4y
• 5x -10y

Simplify the expression: 7v + 2 + 12 + 2v

• 23
• 23v
• 9 + 14v
• 9v + 14

Simplify the expression: 2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

Are -c and 4c like terms?

• Yes
• No

Are 3x and 3 like terms?

• Yes
• No

True or False:
u³and u² are like terms.

• True 
• False