Posted by Lindsey on .
problem:
Dena borrowed $7500 to buy a used car. The credit union charged 9%(percent it looks kind of funny) simple intrest per year. She paid $2025 in interest. For what period of time did she borrow the money.
It would be 3 years. Get how much they charge her per year which is 7500 times .09 (9% in decimal) that gives you 675. Then you divide 2025 by 675 (the amount per year) and you will get 3 years.
Hope that helps!

PreAlgebra 
Nina,
3 Years.