How do I do this problem

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

Sara needs to take a taxi to get to the movies the taxi charges $4.00 for the first mile and then $2.75 for each mile after that if the total charge is $20.50 then how far was sara’s taxi ride to the movie

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled