Ok so for number 1 your answer is wrong. When you deposit money you add it to your bank account. Say you have $5 in your bank account, you deposit $10, you now have $15.
So for number 1 your answer should 75 not -75
Number 2:
The opposite of depositing money is withdrawing money. So your answer is withdrawing
Number 3:
Again the opposite of deposit is withdraw, so if you withdraw 75 dollars from her savings account your basically subtracting. So your answer is -75
I hoped this helped :)