Bryan had 20x dollars. he spent 3x dollars for breakfast, $5 for maps and 6x dollars for a guide book. find the amount of money bryan had left in terms of x. and show work .

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.