Algebraic Expressions Given Variable

6c - 1 + 5c when c = 2

• 31

• 41

• 51

• 21

A variable is . . .

• an awesome number

• a number represented by a letter

• an infinite number

• a number multiplied by another number

5p + 4h - 2
Which are the variables? 

• 5p, 4h, 2

• 2

• p, h

• 5, 4

What is 4x if x=5?

• 20

• 16

• 9

• 45

Evaluate 5y + 2 if       y = 3

• 17

• 19

• 55

• 13

6a - 3d
when a = 1, d = 2

• 3

• 12

• 1

• 0

Evaluate when a = 15:
2(a - 5) + 2

• 22

• 27

• 14

• 7

2x + 3 + x²; for x = 4

• 17

• 27

• 19

• 25

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

• -100

• 100

• -56

• 56

a² - b²
Evaluate if a=4 and b =2

• 4

• 20

• -4

• 12