Evaluating Expressions

What is the constant in the following:
3x + 7

• 3

• 7

• 10

• 3x

Which of the following is an algebraic expression?

• 5 + n

• five plus a number

• 5 + n = 11

• 5 + 6 > 7

Evaluate 3x + 8   if x = 2

• 13

• 14

• 15

• 16

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

• 3

• 12

• 1

• 0

Evaluate 4y if y = 3

• 7

• 12

• 4

• 9

2x + x²; for x = 3

• 12

• 15

• 14

• 26

4 + (y + 3) + y² for y = 5

• 42

• 37

• 19

• 22

Evaluate the expression when y = 5
2y² + 3y

• 75

• 65

• 115

• 105

Evaluate m² if m = 7

• 42

• 43

• 49

• 51

Evaluate y + 17 if y = 11

• 11

• 17

• 27

• 28