Need help with some math problems! Teachers can't help!

1) a) You purchase a new car for $16,725.00 plus 6.15% sales tax. The down payment is $1,400.00 and you have an average credit rating. How much interest is accrued after the first month?

Average Secured-5.85 Unsecured- 6.20

1) b) You purchase a new car for $16,725.00 plus 6.15% sales tax. The down payment is $1,400.00 and you have an average credit rating. If you improved your credit score to good and paid $2,100 on your purchase, how much interest could you save in the first month

Question

Need help with some math problems! Teachers can't help!

1) a) You purchase a new car for $16,725.00 plus 6.15% sales tax. The down payment is $1,400.00 and you have an average credit rating. How much interest is accrued after the first month?

Average Secured-5.85 Unsecured- 6.20

1) b) You purchase a new car for $16,725.00 plus 6.15% sales tax. The down payment is $1,400.00 and you have an average credit rating. If you improved your credit score to good and paid $2,100 on your purchase, how much interest could you save in the first month

ineedatutor · Answer

This was a two part problem, so I added the first one above even though @skullpatrol already helped me with it.

ineedatutor · Answer

I actually have to go to sleep, but I still have a LOT of other questions that I need help with. SO I'll post them below, and if anyone wants to answer them with explanations PLEASE do.

Otherwise I'll just have to re- ask those questions. Remember that I'm including the important part of the graphs (the credit ratings) separately for each question. 


2) You purchase a used car for $17,645.00 plus 4.75% sales tax. The down payment is 10% of the total cost and you have an excellent credit rating. What is your principal balance at the start of the loan?

Excel. secured- 4.80 unsecured- 5.25

3) You are debating about whether to buy a new car for $19,242.00 or a used car for $12,425.00. Sales tax is 6.5%. You (or your parents) plan to make a down payment of $1,200.00 and your credit rating is fair. What is the difference in interest accrued by the end of the first month? *

Fair secured-7.00 unsecured-7.65

4) Say that you are purchasing a used car for $22,350. The sales tax is 7.5%, the down payment is $1,200.00, and you have an average credit rating. If your first payment is $475.25, how much of the payment goes toward the principal?

Ave. Secured 5.85 Unsecured 6.75

You don't have to just give me the answers. I would actually prefer it if you show me how to do it so that I could complete more work like this ( I have a lot of work like this!)