(i forgot what the commutative property of addition was. answer fast. )

which shows the commutative property of addition?

a. 15 + ( 43 + 9 ) = ( 15 + 43 ) + 9

b. 15 + 18 = 30 + 3

c. 15.4 + 23.1 = 23.1 + 15.4

d. 27 + 0 = 27

You have 3 boxes, one "strawberries"; one "mentos" and one "mixed".but you know that all the labels are in incorrect order .how do you know witch is witch?

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

What is the measure of angle x? answer