Answer:
Nico has 25 and his mother has 0
Explanation:
The opposite of -25 is 25 because -(-25)=25 (the negatives cancle out)
Thats why Nico has 25
The opposite of 0 is 0 because 0 is nothing, you cant have an opposite of negative 0 because that would still be 0
Thats why Nico's mother has 0