Combining Like Terms and Expanding Expressions

A letter that represents a number is called a _____.

• variable
• coefficient
• constant
• term

What is the constant in the following expression?
8y + 5 - 35p

• 8
• 35p
• 5
• 8y

3(3x +1)

• 9x +3
• 3x + 3
• 12x
• 9x + 1

Which of these are like terms in the following expression:
3x + 7 - 9x + 24y + 2x²

• 7, 24y
• 3x, 9x
• 3x, -9x
• 3x, -9x, 2x²

Simplify the expression: 2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

Simplify the following expression:
-6x + 4(-x - 3)

• -2x - 12
• 10x + 12
• -10x - 12
• -2x + 12

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

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

Which of the following is equivalent to
-8+9(5 + 2x)?

• -5 - 2x
• 18x+37
• -37 + 18x
• 18x - 53

Simplify the following expression:
-8 (5b + 2) -7 (b - 5)

• -33b + 19
• -47b² +  21
• 33b - 19
• -47b -19

3x²+4x²+7 is

• 7x⁴+7
• 7x² + 7
• 7x⁵
• 7