Nx 7 = 49 what is the missing added?

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

What are the sotions to the quadratic equation 9x^2=4

Match each function with its rate of growth or decay