Student at a university makes money by buying and selling used cars Charles bought a used car and later sold it for 20% profit if he sold it for 4590 how much Charles pay for the car

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220