Combine like terns

Simplify the expression: 2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

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

• 23
• 23v
• 9 + 14v
• 9v + 14

2x+8x+4x

• 10x+4
• 14x

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

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

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

What is a constant?

• A term with no variables.

• A number.

• A term with numbers and variables.

• A letter.

How many terms are in the expression
3a + 2b + c + 100

• 3
• 4
• 5
• 6

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

• 23
• 23v
• 9 + 14v
• 9v + 14