Answer:
285°
Step-by-step explanation:
You have probably learned bearing in geography and maybe even mathematics.
First off, skip the Y part since the answer you're looking for have nothing to do with it.
So, 180°+105°=285°
Those red-colored angles.. they have the same angle.
That's cause they're alternate angles and alternate angle are equal.
That arrow-like thing is to proove that they're parallel.