Answer:
Below.
Step-by-step explanation:
f(x) = |x| This is shaped like a V with the vertex at (0,0).
f(x) = |x| + 3 this is also shaped live a V with the vertex at (0, 3).
(This is |x| translated up 3 units).
f(x) = |x| - 6 similar to the above with the vertex at (0, -6).
(This is |x| translated down 6 units).
Supplementary means they are equal to 180 so combine them and set it equal to 180.
7x - 2 = 180
Add 2
7x = 182
Divide by 7
x = 26
Nikita's value is 4 times less than Bettina's value. I believe this is the answer.

.... Hope this will help....
Answer:
X and Y = 4
Well, it's a right triangle. The red box means 90 degree angle. So I would say that all the sides are equal.