Lina is making a spreadsheet for an assignment. The spreadsheet, when completed, will be 236 lines long, and Lina has already completed 69 lines.
x + 69 = 236

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