Aclassmate displays the results of a class president election in the bar graph shown.

16(-y+13) we can still do y+13 and after we get answer we do that minus 16

There has to be a total of 63 boxes each with a prize in them.there are two types of prizes: the first type is $25 and second type is $100.  if you make all the prizes $100, you will only end up with 27 prizes. ($2700 / 100), which is too little.  if you make all the prizes $25, you will only end up with 108 prizes ($2700/ 25), which is too way many.  the answer has to be combination of prizes more $25 prizes will have an outcome of more prizes in total.  more $100 prizes will have an outcome of less prizes in total.  the answer would come out to48 prizes of $25 each ($1200)  15 prizes of $100 each ($1500) which adds to the full amount of $2700 with 63 prizes.