Answer:
It would be $870 because you have to add 315+555=870
2/5 of the cake are left. Tiffany ate 1/5 and Omer ate 2x the amount, which is 2/5.
Answer:
B
Step-by-step explanation:
Answer: False
"Depreciating" means "going down", so the value is decreasing. The value of A will always be smaller than C. For example, if the item is worth $100 today and it drops to $80, then it depreciates in value. In this example, C = 100 and A = 80 so A > C is false
Answer:
Step-by-step explanation:
Given that *is the binary operation in the sets of integers.

closure: a-b+ab is again an integer belongs to Z. Hence closure is true.
Associativity: 

The two are not equal. Hence this cannot be a group as associtiavity does not hold good.