Ann can build a model car in 5 hours, while sam can build the same model in 15 hours. how many hours would it take for them to build the model together? (set up the rational equation, and solve for x)

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.