Evaluating Algebraic Expressions

evaluate bc + 5a  
when  a = 3, b = 4, and c = -6

• 9

• 38

• -38

• -9

9a - ab + 5b    
if a = 2 and b = 7

• 37

• 67

• 39

• 32

5m + 9n if m = -7 and n = 4

• 71

• 1

• -1

• -71

For a monthly family cookout, David buys 3 packages of hot dogs and 4 packages of hamburger patties. Hot dog packages each contain x hot dogs. Hamburger packages each contain y hamburger patties. Complete the expressions for the total number of hot dogs and hamburger patties David buys for 6 cookouts. 

6( ​ (a)   x + ​ (b)   y)

​ (c)   x + ​ (d)   y

• 3

• 4

• 18

• 24

• 7

For a monthly family cookout, David buys 3 packages of hot dogs and 4 packages of hamburger patties. Hot dog packages each contain x hot dogs. Hamburger packages each contain y hamburger patties. Complete the expressions for the total number of hot dogs and hamburger patties David buys for 6 cookouts. 6( ​ (a)   x + ​ (b)   y)

​ (c)   x + ​ (d)   y

• 3

• 4

• 18

• 24

• 7

For a monthly family cookout, David buys 3 packages of hot dogs and 4 packages of hamburger patties. Hot dog packages each contain x hot dogs. Hamburger packages each contain y hamburger patties. Complete the expressions for the total number of hot dogs and hamburger patties David buys for 6 cookouts.

• 3

• 4

• 18

• 24

• 7

x² - xy if x = 8 and y = -3

• 88

• 40

• -8

• -24

(18 - ab) + 4b if a = -2 and b = -5

• 8

• 28

• 48

• -12

-7w² + 2w if w = -4

• 104

• -64

• -120

• 120

a²-b²Evaluate if a=4 and b =-2

• 4

• 20

• -4

• 12