Rick deposited $700 to his bank account using $5 and $15 dollar bills only. If Rick came to the bank with 70 bills and left with 10 bills only, how many $15 dollar billsმ did he deposit? Choose the correct answer
A) 40. B) 25. C) 50. D) 55. E) 65.
5x+15y=700 --1   x+y=60 ---2   multiply eq 2 with 5 and subtract from eq 1   5x+15y=700   5x+5y=300   10y= 400   y=40 and x = 20   therefore $15 bills = 40   40.nswer 40.
<result>A</result>
Rick deposited $700 to his bank account using $5 and $15 dollar bills only. If Rick came to the bank with 70 bills and left with 10 bills only, how many $15 dollar billsმ did he deposit?