Hi can sombody pleasee answer these and say what r, n, and y on all the equations are 85 - 7.2r = 25.24

6r - 3 = 10

170 - 4n = 130

4(2+3y) + 10 = 12

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.

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same