You have $2.65 in coins. Which system of equations could represent this situation, using variables to represent the number coins? x+y=11 and 25x+5y=265; x= number of quarters and y= number of nickels. x+y=12 and 25x+5y=265; x= number of quarters and y= number of nickels. x+y=13 and 25x+10y=265; x= number of quarters and y= number of dimes. x+y=12 and 25x+10y=265; x= number of quarters and y= number of dimes.