221+ X equals 386 right and solve an addition equation to find how many trading cards are Levi’s

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

Factor this polynomial completely x^2-64

How many terms does the polynomial x^2 y^2 have