Which of the following number lines models the expression below?
-2.5 + (-1)

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)

If the angle bisectors of a pair of opposite angles of a quadrilateral are the opposite sides of a parallelogram formed by the two angle bisectors and two sides of the quadrilateral, is the quadrilateral always a parallelogram? explain your answer.

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?