6th grade math help me pleaseee

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

Find the value of the variable and the length of each secant segment.

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling