Rita has a loan of 45,580.this has a simple interest of 4% per year. what is the amount of interest that rita will be chagrined on this loan at the end of the year? show me how to work it out.

At the end of the first year, unless she is interest free for the first year, will be 47,403.20 because when you multiply the original number by 4% (or .04), you get 1,823.20. Add this to the original amount, and that is what she has to pay back after the first year.

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2