Jo bought an item for 45¢, and paid with a $1.00 bill. How many different ways could she get her 55¢ change with combinations of only nickels, dimes and quarters?
qqn
q ddd
q dd nn
q d nnnn
q nnnnnn
dddddn
dddd nnn
ddd nnnnn
dd nnnnnnn
d nnnnnnnnn
nnnnnnnnnnn
looks like 11 ways