Simple Substitution

When a = 2, what is the value of

4a?

• 42

• 8

• 2

• 6

When x = 6, what is the value of

x + 2

• 8
• 4
• 12
• 10

When x = 3 , what is the value of

x + 5

When x = 4 , what is the value of

2x - 6

• 18

• 0

• 2

• 12

Substitute x = 5 into the expression:

4x + 5

Substitute x= 3 into the expression 3x+1

• 3

• 9

• 10

• 7

If x = 3 and y = 4, then what is the answer to 2x + 3y

• 18

• 7

• 17

• 12

• 30

• 20

• 3

• 5

• 10

• 6

• 60

• 5

Evaluate 15 - m  for m = 7

• 22
• 8
• 2
• 9