Can someone help me with this question? Explanations would be nice.

Which statement explains how you could use coordinate geometry to prove that quadrilateral abcd is a parallelogram? -5 -4 -3 -2 -1 t 1 2 3 4 prove that all sides are congruent and have slopes that are opposite reciprocals prove that segments ad and ab are congruent and parallel prove that opposite sides are congruent and have equal slopes prove that segments bc and cd are congruent and parallel

What are the sotions to the quadratic equation 9x^2=4

What is the ratio of the length of an object in yards to the length of the same object in miles?