Question

Kevin and randy muise have a jar containing 68 ​coins, all of which are either quarters or nickels. the total value of the coins in the jar is ​$13.40. how many of each type of coin do they​ have?

Answer 1

For this case, the first thing we must do is define variables:
x: number of quarters
y: number of nickels
We now write the system of equations:
x + y = 68
0.25x + 0.05y = 13.40
Solving the system we have:
x = 50
y = 18
Answer:
they have:
quarters = 50
nickels = 18