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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.

 Jun 24, 2019
 #1
avatar+101813 
+2

$90

 

9 tens

1 twenty and 7 tens

2 twenties  and 5 tens

3 twenties ans 3 tens

4 twenties and 1 ten

 

 

 

 

cool cool cool

 Jun 24, 2019
 #2
avatar+912 
+3

$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 

Nickolas  Jun 24, 2019

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