Answer:
50 dimes and 90 quarters
Step-by-step explanation:
This problem you will need 2 equations
1. D + Q = 140 ( shows the total amount of coins)
2. 0.1D + 0.25Q= 27.50 ( shows the total cost)
The best way to do this is by substitution
To get D by itself the first equation would turn into D= 140-Q
Plug 140-Q into the second equation where you see D and solve for Q
Once you solve it you should get Q=90 then to get D it would be 140-90 which gives you D=50.
