Problema Solution
350 students took geometry last year. Some intended to take algebra,
some trigonomety, and the rest were unsure what math course to take next. If three times as many students were planning to take algebra as trigonomety, and if 50 fewer were undecided than were preparing for trigonomety, how many students were of each type?
Answer provided by our tutors
a + t + u = 350
a = 3t
t - 50 = u
3t + t + (t - 50) = 350
5t - 50 = 350
5t = 400
t = 400/5 = 80 students intend to take trig
Replace t with 80. Solve for u and a.