Seven of the 10 children at art camp make an average of 8 paintings. the remaining children make an average of 12 paintings. what is the average number of paintings made by children at the art camp? plzz

Ineed in figuring out this problem.

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.

Line u passes through points (-52, -18) and (-29, 53). line v passes through points (90, 33) and (19, 56). are line u and line v parallel or perpendicular?