Proving the Congruent Supplements Theorem?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

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.