How many mililiter of water must be added to pint of 95% alcohol to prepare a diluted 20% solution

What is the relationship between all triangles that can be drawn given the same three angles

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

M? aoc=96 ? space, m, angle, a, o, c, equals, 96, degree \qquad m \angle boc = 8x - 67^\circm? boc=8x? 67 ? space, m, angle, b, o, c, equals, 8, x, minus, 67, degree \qquad m \angle aob = 9x - 75^\circm? aob=9x? 75 ? space, m, angle, a, o, b, equals, 9, x, minus, 75, degree find m\angle bocm? bocm, angle, b, o, c: