Final answer:
To find the total change in Serah's checking account balance, you need to multiply the number of withdrawals by the amount of each withdrawal and add the amount of the check. The account balance decreases by the total amount withdrawn plus $300 for the check.
Step-by-step explanation:
The student's question asks about the change in a checking account balance after Serah made free withdrawals and wrote a check. We start with the assumption that each withdrawal is for an unspecified amount 'x'. To determine the total change in her account balance, we must add up all the withdrawals and the amount of the check she wrote.
If Serah made 'n' free withdrawals of an unspecified amount 'x', the total amount withdrawn is 'n' times 'x' (n*x). Writing a check for $300 further decreases her account balance. Therefore, the total change in Serah's account balance would be:
Total Change = (n * x) + $300
Without knowing the specific values of 'n' and 'x', we can't calculate the exact change in her account balance. However, it will decrease by the total amount withdrawn plus $300 for the check.