A survey of 123 college students was done to find out what elective courses they were taking. Let A = the set of those taking ar
t, B = the set of those taking basketweaving, and C = the set of those taking canoeing. The study revealed the following information. n(A) = 45 n(A ∩ B) = 12 n(B) = 55 n(A ∩ C) = 15 n(C) = 40 n(B ∩ C) = 23 n(A ∩ B ∩ C) = 2 How many students were not taking any of these electives?
Let y = the length of the 3rd side x+3 + 2x+4 + y = 6x x + 2x + 3 + 4 + y = 6x 3x + 7 +y = 6x 7 + y = 3x y = 3x - 7 The length of the third side in terms of x is 3x-7
