Answer:
She needs to deposit at least $21.21 in her account to avoid a fee.
Step-by-step explanation:
Consider the provided information.
Tony has $727.29 in his checking account and he wrote a check for $248.50 today.
Let x be the amount that she needs to deposit.
He must maintain a $500 balance to avoid a fee. That means the balance can be greater than or equal to $500.
The inequality used for greater than or equal is ≥
As he wrote a check which indicates the deduction from account so use a negative sign and to deposit use a positive sign,
Thus the required inequality is:

Now add the like terms:


Subtract 478.79 from both sides.


Hence, she needs to deposit at least $21.21 in her account to avoid a fee.