Expressions

Identify the variables in the expression
3x +  9

• x

• y

• 9

• 3x

The number before a variable is the _____.

• term

• constant

• coefficient

• variable

Evaluate the following expression: 2b + 3

Where b = 7

• 30

• 12

• 17

• 24

Evaluate the following expression: m + 5p

Where m = 15

Where p = 4

• 79

• 35

• 69

• 24

Jamie uses the following expression to figure out how many wrapped presents she will have: 6h + s The variable h represents how many hours she spends wrapping and s represents how many presents that were already wrapped. If she wrapped for 4 hours and already had 10 presents wrapped, how many wrapped presents will she have?

• 34 wrapped presents

• 74 wrapped presents

• 20 wrapped presents

• 40 wrapped presents

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

2x + 3 + x²; for x = 4

• 17

• 27

• 19

• 25

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

(c-a)^b

• 6

• 1

• 4

• 8