Please help me solve this problem one problem for 15 points

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

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola