Evaluating Expressions

Simplify the following expression:
 $3^2-2+\left(\frac{6}{2}\right)$  

• 9

• 7

• 10

• 12

Simplify the following expression:
 $3+\left(18-21\right)\cdot4$  

• -9

• 0

• -24

• -61

Evaluate $21x-42$  for x = 2

• 42

• 84

• 0

• -24

Evaluate $7p+152$  for p = 8

• 208

• 202

• 200

• 197

Evaluate $7h+4m$   
for h = 3 and m = 2

• 29

• -21

• 23

• 21

Evaluate
 $\frac{ab}{c}$ 
for a = -2, b = 52, and c = 4

• -104

• -26

• 26

• 102

Evaluate  $30-3x^2$  
for x = 5

• -75 

• -45

• 35

• 45

Evaluate $5x+2y-7$  
for x = 2 and y = -3

• -3

• 4

• 7

• -4

A letter or symbol used to represent an unknown value.

• Coefficient 
• Term
• Variable
• Constant

Contains numbers, operations, and variables and no equal sign. 

• Expression
• Equation
• Inequalities
• Term