STS11

How many terms are in this expression:

2x + 5 - x + 6x + 1

• 3 terms

• 4 terms

• 5 terms

• 6 terms

Simplify the expression: 3x + 2x

• 5x
• x
• 6x
• 5

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

-6k + 7k=

• k
• -k
• 12k
• -12k

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

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

A _______ is a letter that represents an unknown number.

• constant

• variable

• exponent

• coefficient