HURRY If the midpoint of a segment is (-1, 5) and one endpoint is (1, 7), find the other endpoint.

(-3, 3)

Step-by-step explanation:

The points are easy to plot on a graph to see where the other endpoint should be.  See the attached image.

You can also look at the problem this way:

Start at the midpoint and go to the given endpoint, paying attention to how far right/left and up/down you go, a bit like following streets and avenues.

From (-1, 5) TO (1, 7), you go right 2, then up 2.  Now go back to the midpoint and reverse those two motions.

From (-1, 5) go left 2, then down 2.  You are at the other endpoint, (-3, 3).

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°