Which mathematical property is demonstrated? 72+(28+93)=(72+28)+93
a. communicative property of addition
b. associative property of addition

The given number = 72 + (28 + 93) = (72 + 28) + 93
This given number is an example of associative property of addition.
because associative property of addition is a process where you are going to add the given numbers in a different group but still able to get the same answer.
=> 72 + (28 + 93) = (72 + 28) + 93
=> 72 + 121 = 100 + 93
=> 193 = 193