you have to divide 30 by six to see how much one pair costs and it would give you 5. Then you multiply by 8 to see how much 8 pairs would cost and you would get 40.
A) AB is where plane P and plane R intersect. B) A, D, B are collinear (on the same line). C) plane ADG (three points on the plane) D) F, D, G, A are all on plane R E) D lies on both planes.
