I'm having trouble just starting this problem

You receive a $500 gift and decide to use it to start saving for a car. You add $50 dollars a week from your part time job. Write the recursive definition for an arithmetic sequence that models this situation. Then, find the amount you will have saved after 30 weeks

Thank you!!!

$500 + $50(weeks)

$500 + $50(30) = ?

Don't you get any interest on those savings?