expressions review

Identify the variables in the expression
3x +  9

• x
• y
• 9
• 3x

What step would I do second?
 (4 - 2) x 9 + 7 =

• multiplication
• subtraction
• addition
• dividing

(3 + 4)² - 32 

• 7
• 112
• 17
• -7

How do you write this in exponent form?
4 * 4 * 4 * 4 * 4 * 4 * 4 * 4

• 4⁷
• 65,536
• 4⁸
• 7⁴

Evaluate the following expression: m + 5p

Where m = 15

Where p = 4

• 79

• 35

• 69

• 24

Michael uses the following expression to help figure out how much money he makes:

8w + t

The variable w represents the amount of weeks he works and t represents the number of tips he makes. If he works for 6 weeks and makes $20 in tips, how much money did he make?

• $26

• $68

• $106

• $34

Evaluate this expression:
3(4)²

• 144
• 48
• 24
• None of these

Evaluate 2a + 4b 
if a = 10     and    b = 6

• 20
• 24
• 44
• 4

Evaluate. a=2 b=3 c=4

a^b +b^a

• 12

• 5

• 17

• 24

4a + 9 + a

• 5a + 9
• 14a
• 3a + 9
• 5a - 9