+1713 A cashier needs to refund $90 using $10 and $20 bills. Find all the possibilities for the number of each type of bill the cashier could use.
+129907 $90
9 tens
1 twenty and 7 tens
2 twenties and 5 tens
3 twenties ans 3 tens
4 twenties and 1 ten
+1008 $10 AND $20 that equal $90
1. 10x9=$90 so 9 10 dollar bills equals 90
2. 4x20=80 1x10= 10 so 4 twenty dollar bills and 1 10 dollar bill equals $90
3. 3x20=60 3x10= 30 so three twenty dollar bills and 3 ten dollar bills equals $90
4. 2x20=40 5x10=50 so two twenty dollar bills and 5 ten dollar bills equals $90
5. 1x20=20 7x10=70 so 1 twenty dollar bill and seven ten dollar bills equals $90
