300
Your mom's purse has 54 coins in it. They are either dimes or quarters. If you know that she has "d" amount of dimes, what expression would represent the amount of quarters she has?
a) d + 54
b) d - 54
c) 54 + d
d) 54 - d
d) 54 - d
If 54 is the total, and I know she has "d" dimes, I can take away the dimes to be left with the number of quarters.