Substitute Expressions

If y = 2, what is the value of the expression 5y?

• 7

• 6

• 8

• 10

Evaluate the expression for x = 7: 2x + 9

• 16

• 18

• 20

• 23

If y = 7, what is the value of the expression 4y?

• 24

• 28

• 32

• 36

Given z = 10, calculate the result of 6z.

• 54

• 60

• 66

• 72

Evaluate the expression for x = 8: 3x - 4

• 20

• 22

• 24

• 26

If y = 8, what is the value of the expression 2y?

• 14

• 16

• 18

• 20

Given z = 7, calculate the result of 5z.

• 30

• 35

• 40

• 45

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

• 8

• 28

• 48

• -12

Evaluate the expression:

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

• 24

• 21

• 10

• 46

Substituting an expression is like.....

• taking out a variable and not replacing it

• taking out a variable and replacing it with an expression

• combining the two expressions