a fence along a rectangular yard has a total length of (15x^2-7x+3) feet. (5x^2+4) feet represents the part of the fence that needs to be repaired. write the polynomial that represents the part of the fence that does not need repairing

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