Answer: So there are 12 bills of $10 and 11 bills of $20.
Step-by-step explanation:We are given that the cash register contains $10 and $20 bills.
Let us say there are x number of $10 bills and y number of $20 bills.
So there are total 23 bills.
..............(1)
.........(2)
We are also given that the total value of bills is $340 .
So that gives us the second equation,
.........(3)
Plugging the value of x from equation (2) in (3),
y=11
Plugging this value of y back in equation (2),
x=23-11= 12