Respuesta :
Answer:
There are 21 twenties and 8 fifties in the drawer.
Step-by-step explanation:
This question can be solved by a system of equations.
I am going to say that:
x is the number of twenties
y is the number of fifties.
A cash drawer contains 29 bills.
This means that x + y = 29.
The total value of the bills is $820.
This means that 20x + 50y = 820.
So
x + y = 29
20x + 50y = 820
From the first equation, x = 29 - y. So:
20x + 50y = 820
20(29 - y) + 50y = 820
580 - 20y + 50y = 820
30y = 240
y = 8
And
x = 29 - y = 29 - 8 = 21
There are 21 twenties and 8 fifties.
Answer:there are 21 twenties and 8 fifties in the drawer.
Step-by-step explanation:
Let x represent the number of bills that are twenties in the drawer.
Let y represent the number of bills that are fifties in the drawer.
The cash drawer contains 29 bills. All twenties and fifties. This means that
x + y = 29
If the total value of the bills is $820, it means that
20x + 50y = 820 - - - - - - - - - - 1
Substituting x = 29 - y
20(29 - y) + 50y = 820
580 - 20y + 50y = 820
- 20y + 50y = 820 - 580
30y = 240
y = 240/30 = 8
x = 29 - y = 29 - 8
x = 21
