how many different combinations can you make using pennies, nickels, dimes, quarters, and the half dollar that equal 60 cents?

Answer 1

No idea. Just start listing them, fewest coins first. Then start breaking down into smaller values

50 10
50 5 5
50 5 1 1 1 1 1
50 1 1 1 1 1 1 1 1 1 1
25 25 10
...