Answer:
80
Step-by-step explanation:
A quadrilateral measured 360. if you do not know that you can multiply 360 by 2 because there are 2 triangles in a quadrilateral. Then you subtract 360 by 75,115, and 90. And you will get 80 degrees
A
Using desmos we can see that the slope is positive and increasing while Mallory made a negative slope.
x=13/8
8x-12=1
8x=13
50 is the sum
-10+20=10
10+-40=-30
-30+80=50
