let's recall that a triangle has a total of 180° for its interior angles.
x = first angle
3x = second angle, three times the first one
5x = third angle, five times the first one, and largest.

Answer:
I'm not sure if this is right, but I got 3/4. (0.75 as a decimal) I hope this helps!
Step-by-step explanation:
If we look at the rest of the input and output, we also realize that:
output = input + 5
Thus if the input is 'n' then the output is 'n+5'
Hope that helps!
Negative, You'll have to explain the why part though,