Which expression is equivalent to the given expression? -5y2 + 50y — 105 A.-5(y + 21) (y + 1)
B.-5(y - 3)(y - 7)
C.(-5y + 21)(y – 5)
D.(5y – 35)(-y + 7)

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.