Evaluating Expressions

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

• 8

• 28

• 48

• -12

x² - xy if x = 8 and y = -3

• 88

• 40

• -8

• -24

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

• 71

• 1

• -1

• -71

8(9) - (2 + 4)³

• 54

• -144

• -1656

• 288

Evaluate 4w - 3y if w = 7 and y = 6

• 24

• 21

• 10

• 46

r³ + 2s²    
 if r = -3  and s = 4

• 59
• 5
• 37
• 91

Evaluate when a = 15:
2(a - 5) + 2

• 22
• 27
• 14
• 7

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

• 20
• 24
• 44
• 4

Identify the variables in the expression
3x +  9

• x
• y
• 9
• 3x

A term can be made up of which of the following?

• a number
• a variable
• a coefficient with a variable
• all of the above