Can someone help me with this ?​

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

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

What is the point slope form of a line with slope -5 that contains point (2,-1)