The question reminds you of all the tools you need:
It says ...
"Opposite angles are equal."
So the upper right angle is x+40 just like the bottom left,
and the bottom right angle is 3x+20 just like the upper left.
And it says ...
"The sum of all angles is 360°."
You know what each of the four angles is, so you can addum all up,
set the sum equal to 360, find out what number ' x ' is, and then
use that to find the size of every angle.
Answer:
What is the average rate of change from x = −4 to x = 1? x= -4 x + 5
Answer:
92
Step-by-step explanation:
Corner triangle: 1/2 (2 x 2) = 2
4 triangles = 4 x 2 = 8
Octagon + 4 triangles forms a square: 10 x 10 = 100
Octagon: 100 - 8 = 92
