Representatives from the student councils at three area high schools are traveling to the national convention in new york. north springdale high school is sending 5 more students than south springdale high school and west springdale high school is sending 6 more students than north springdale. the three schools are sending a total of 46 students to the convention. how many of the students are coming from north springdale?
a) 10 students
b) 15 students
c) 21 students
d) 30 students