are these direct write off or allowance method and are they recovery or recording a write off?

1) assume a business records a journal entry that debits bad debt expense and credits accounts receivable?

2) assume a business records a journal entry that debits bad debt expense and credits allowance for doubtful accounts.

3) assume a business records a journal entry that debits accounts receivable and credits bad debt expense.

4) assume a business records a journal entry that debits accounts receivable and credits allowance for doubtful accounts.

5) assume a business records a journal entry that debits allowance for doubtful accounts and credits accounts receivable.

6) assume a business records a journal entry that debits allowance for doubtful accts and credits bad debt expense

7) assume a business records a journal entry that debits accounts receivable and credits notes receivable.

^ is this a note honored or dishonored at maturity?