Question

You have 6.15 worth of quarters and dimes in a jar there are 3- coins in the jar. Write and solve a system of equations to find the number x of dimes and the number y of quarters. @Mathematics

Answer 1

there are 3- coins in the jar? that is not a number

Answer 2

there were either 30, 33, 36 or 39 coins in the jar...since the '0' is right next to the '-' key i assume you meant 30...

in which case, let x = number of quarters, y = number of dimes

x + y = 30
0.25x + 0.10y = 6.15

solution: x = 21, y = 9