Evaluating Expressions

Simplify the expression if m = -7 and n = 4:

5m + 9n

• 71

• 1

• -1

• -71

Simplify the following expression if x = 8 and y = -3

x² - xy

• 88

• 40

• -8

• -24

Simplify if w = -4

-7w² + 2w

• 104

• -64

• -120

• 120

Simplify the following expression if a = 4 and b = -2

(20ab) ÷ (a-b)²

• 40/3

• 40

• -40/9

• -13

What is the value of the expression

x² + y² + x - y

when x = -1 and y = 3?

• 6

• 8

• 12

• 16

Evaluate bc + 5a

when a = 3, b = 4, and c = -6

• 9

• 38

• -38

• -9

What is 16y - u + 34x when x=2 u =14 and y = 3?

• 102

• 43

• 2

• 107

Evaluate -2x  if     x = 10

• -8
• 20
• -20

Evaluate 4y  if       y = 3

• 7
• 12

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

• 20
• 24
• 44
• 4