Answer:
A. the Commutative Property
Step-by-step explanation:
D doesn't exist
C is wrong and so is B.
the Zero Property
IT SAYS YOU IN COLLEGE SOOO YOU SHOULD BE ABLE TO ANSWER IT YOUR SELF
21
48 ÷ 3 = 16
16 + 5 = 21
a=14.28
b=22.919
c=68°