Which mathematical property is demonstrated? 7 + 9 + 3 = 7 + 3 + 9

A. commutative property of addition

B. associative property of addition

C. commutative property of multiplication

D. associative property of multiplication

I believe the answer would be A

Step-by-step explanation:

Hope this helps!

7

step-by-step explanation:

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.