There are 58 ways: in 34 cases, each of the three coins must be used at least once.
There are 18 ways to make change for 75 cents with only quarters, dimes and nickels.
Five different ways.
5 quarters 4 quarters 2 dimes and a nickel 10 dimes and 5 nickels
many ways 4 quarters and 3 nickels 4 quarters and a dime and a nickel 3 quarters 8 nickels 3 quarters and 4 dimes etc etc etc
10 Nickels 2 Quarters = $1.00 4 Dimes 7 Nickels 1 Quarter = $1.00 8 Dimes 4 Nickels = $1.00
There are 18 ways to make change for 75 cents with only quarters, dimes and nickels.
None. If you "get 65 cents using only dimes nickels and quarters" you are not using any pennies!
There are 5 ways to make 30 cents using quarters, nickels, and dimes.
Five different ways.
5 quarters 4 quarters 2 dimes and a nickel 10 dimes and 5 nickels
6 dimes, 5 dimes 2 nickels, 4 dimes 4 nickels, 3 dimes 6 nickels, 2 dimes 8 nickels, 1 dime, 10 nickels, and 12 nickels.
10
many ways 4 quarters and 3 nickels 4 quarters and a dime and a nickel 3 quarters 8 nickels 3 quarters and 4 dimes etc etc etc
There are 2 solutions (if you include the non-use of quarters): 1 Quarter, 2 Dimes, 2 Nickels, 45 Pennies No Quarters, 2 Dimes, 8 Nickels, 40 Pennies
10 Nickels 2 Quarters = $1.00 4 Dimes 7 Nickels 1 Quarter = $1.00 8 Dimes 4 Nickels = $1.00
50 different ways
Three: one using only nickels, one using only dimes and one using only quarters!