Ms. pacheco, mr. edwards, and mr. richards are three math teachers at turner middle school. ms. pacheco is three years older than mr. richards. mr. edwards is twice as old as mr. richards. the sum of mr. richards' age and mr. edwards' age is 81. how old is each person?

Question 2 (essay worth 10 points) (03.02 mc) in δabc shown below, point a is at (0, 0), point b is at (x2, 0), point c is at (x1, y1), point d is at x sub 1 over 2, y sub 1 over 2, and point e is at the quantity of x sub 1 plus x sub 2 over 2, y sub 1 over 2: triangle abc is shown. point d lies on segment ac and point e lies on segment bc. a segment is drawn between points d and e. point a is at the origin. prove that segment de is parallel to segment ab.