1. Find the midpoint of the segment with endpoints at (-2, -1) and (0, 9). Show your work.

2. Find the length of the segment with endpoints at (2, 7) and (8, -1).

3. Find the slope of the line that goes through each pair of points:(5, 7) and (-4, -2) .
Show your work.

4. Use the slopes (5, 7) and (-4, -2) from the previous question to describe each line as slanting downward, slanting upward, horizontal, or vertical. Explain your answers.

2 x t divided by n

step-by-step explanation:

b.

step-by-step explanation:

answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.