The sum of three times a number x and nine"

What is the ratio of the length of an object in yards to the length of the same object in miles?

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.

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