Algebra Grade 7
posted by rawr... im a dinosaur.... rawr on .
You invest $275.00 in a moneymarket account that pays simple interest at a rate of 10%. How long must you leave your investment in the moneymarket account if you expect to earn $27.50 in interest?
A year? How do I work it?

275 * 0.1 = $27.50
One year 
What about this one?
A new house costs $160,000.00. Sara wants to buy the house and needs $1,534.00 for a down payment. If Sara currently has $1,300.00 in a savings account paying simple interest at a rate of 3%, how long must she keep the money in the savings account in order to have enough for the down payment on the house? 
1,534  1,300 = $234 she needs
1,300 * 0.03 = 39
234 / 39 = 6 years 
Thank you Ms. Sue, I really appreciate your help.... :)

You're very welcome, Rawr!

A new house costs $160,000.00. Sara wants to buy the house and needs $1,534.00 for a down payment. If Sara currently has $1,300.00 in a savings account paying simple interest at a rate of 3%, how long must she keep the money in the savings account in order to have enough for the down payment on the house?