Somebody plz help me with this question!

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

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