Which equations are true?

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

Find the distance between the pair of points a(-1,8) and b(-8,4)

Determine the following data for the quadratic relation f(x) = -3(x+2)(x-3)? i. direction of opening: ii. x-intercepts: iii. y-intecept: iv. axis of symmetry: v. vertex: