Final answer:
To find Tony's new account balance, add his initial balance of -15 with the 45 dollar deposit resulting in 30 dollars.
Explanation:
To determine how much money Tony now has after depositing $45 into his account, we need to add the initial balance of -15 dollars to the deposit.
The calculation would be: -15 + 45 = 30 dollars.
Therefore, Tony now has 30 dollars in his account.
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