Evaluate Expressions Substitution

Evaluate the expression. Let g = 3 h = 9

4g + 2h + 4

• 42

• 34

• 46

• 58

What is the variable in the expression y - 7

• 7

• y

• y-7

• There is not a variable

Write an algebraic expression for "12 more than number". 

• x + 12

• 12x

• x - 12

Evaluate the expression when m = 5

m² + 4

• 9

• 14

• 21

• 29

Evaluate 2r + 1 if r = 3

• 6

• 5

• 7

• 8

Evaluate 4 + y if y = 3

• 7

• 12

Evaluate for y = 6

4y - 5

• 12

• 13

• 19

• 34

Evaluate for v = 4

5(v + 1)

• 26

• 12

• 11

• 25

5 x (6-3) =

• 19

• 27

• 15

• 23

Using the steps shown, Heather tried to simplify this expression. What was her first mistake?

• Step 1

• Step 2

• Step 3

• Step 4