Which point can be found using the vertical line x = –9 and the horizontal line y = 8?

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 is the sum of these mixed numbers 2 1/8 + 4 3/8

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.