Final answer:
The journal entries for the specified transactions involving accounts receivable and bad debt expense are provided.
Step-by-step explanation:
1. On September 29 of the current year, an account receivable for $3,400 from March of the current year was determined to be uncollectible and was written off. The journal entry for this transaction will be:
Accounts Receivable → Allowance for Doubtful Accounts
2. The appropriate bad debt expense adjustment was recorded for the current year. The journal entry for this transaction will be:
Bad Debt Expense → Allowance for Doubtful Accounts