Triangles ALWAYS measure 180 degrees.
78 + 23 = 101
180 - 101 = 79
The measure of the other angle is 79 degrees.
Hope this helped
I want to say that your answer is D
The slope is 8.
(5,40) (10,80)
80-40=40
10-5=5
40/5=8
-1 because m (slope) is going in a negative direction and for every x unit to the right, y is going 1 unit down