Anthony has a cup full of nickels and dimes worth $6.80. There are 82 coins all together.
Which of the following systems of equations correctly models this situation?
x+y= 680
5x+10y = 82
B. 5x+10y = 680
x+y=82
5x +y = 680
x+10y = 82
D. 5x+y=82
x+10y = 680