75 percent of $82 i know the answer how do i solve hel

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.

Agroup of three friends order a combo meal which includes two slices of pizza and a drink each drink is priced at $2.50 the combined total of $31.50 how much is the cost of a slice of pizza