I need help please explain this to me! I think you might need to use Desmos for graphing??

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

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?