The answer would be choice C.
Perpendicular lines cross each other and form a right angle as you can see marked in the third picture.
$57.18 + 256.79 = 313.97
313.97 - 68.42 = 245.55
245.55 - 50.00 = 195.55
195.55 - 31.06 = 164.49
that’s your answer
You have

So, we have to compute g(7) and feed it as input to f(x). We have

Answer:
x=12°
Step-by-step explanation:
3x+6+48=90
3x+54=90
3x=90-54
3x=36
x=36/3
x=12
x=12°