Help please :)

(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Which best explains why this triangle is or is not a right triangle ?