Evaluating Expressions Algebra

a² - b²
Evaluate if a=4 and b =2

• 4

• 20

• -4

• 12

Evaluate if a = 2 and b = 8
6 + 7b - 3a

• -100

• 100

• -56

• 56

The expression 7h + 1.50d can be used to find the total earnings after h hours and d deliveries have been made.  How much will Sally make after working 10 hours and making 3 deliveries?

• $74.50

• $36

You order CDs for $14.25 each and the website charges $4.50 for each shipment. The expression $14.25p + $4.50 represents the cost of p CDs.  Find the total cost for ordering 4 CDs.

• $61.50

• $22.75

Evaluate the expression using the values m = 7, r = 8, and t = 2.
3m – 5t

• 21

• 11

• 10

• 22

Evaluate the expression using the values m = 7, r = 8, and t = 2.
r/t

• 8

• 6

• 4

• 7

Evaluate the expression using the values
 m = 7, r = 8, and t = 2.
4m + t

• 30

• 28

• 26

• 14

Evaluate 7y - 3y for y=2

• 40

• 73

• 8

• 4