If x
=
4
and
y
=
5
, evaluate the following expression:
3
x
2
+
3
x
y
+
y
2

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