need these asap I’m timed

Which number produces a rationale number when multiplied by 1/5

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

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.