Identify the property being demonstrated for each expression 3+ 5 + 7) = (3+5) + 7
(357)] = (3)7(5))
5+0= 5

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.