What value, entered in the blank below, would make the two expressions equivalent? Express any non-whole numbers as fractions. (__x+1)(2x+6)=8x2+26x+6

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