1. Registed as a Vendor with the city and paid the $15 monthly fee.
2. Customers rented in-line skates and bicycles for cash $1,800.
3. Paid $125 bill from local radio station for advertising for the last two weeks of May.
4. Billed the local park district $1,200 for in-line skating lessons provided to neighborhood children. The park district is to pay one-half of the bill within five working days and the rest within 30 days.
5. Customer rented in-line skates and bicycles for cash $3,000.
6. Paid wages of $160 to a friend who helped over the weekend.
Please help me, I don't know how to journalize these entries. Thank you.

At least try. You don't just suddenly end up with questions about journal entries, do you? You must have had questions/examples quite similar before.

I have tried, but I don't think that they are right and I don't know anyone to ask. So please help me! If you want proof I will tell you what I put for each one...
1. I wasn;t not sure at all how to record that one.
2. Cash was debited, Rent-Equipment was credited
3. Retained Earnings was debited, Cash was credited
4. Accounts Receivable was debited, Accounts payable was credited, Notes payable was credited
5. Cash was debited, Rent-Equipment was credited
6. This one I'm not really what to do with because it's not the same as paying an employee. Or is it?

1. Debit an Expense Account and Credt Cash
2. Debit Cash and Credit a Revenue Account (Rental Revenue)
3. Debit Advertising Expense and Credit Cash
4. Debit Accounts Receivable and Credit a Revenue account
5. Debit Cash and Credit Rental Revenue
6. Debit Salaries Expense and Credit Cash

You should have been given a list of accounts in your problem so you will have to figure out what expense account to use in number 1 and what revenue accounts to use in numbers 2, 4, & 5.

See? You got some of them right, some you got half-right, and I'm sure that if you tried something for the ones you didn't answer, you'd get them half right too :)