20/100 as tenths in fraction form and decimal

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

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*