Step-by-step explanation:
Hey there!
Here,

While working with them remember some rules;
- (-) + (-) = sign (-) but add them.
- (+) + (+) = sign (+) and add.
- (+) - (+) = subtract but keep sign of greator number.
- (-) -(-) = subtract and keep the sign of greator number.
Likewise in your question,



<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
This means that the door is open because half of a circle (360) is 180 and that means it’s open because u can’t open a door all the way at a 360
The answer is 44 because all you have to do is use PEMDAS to solve the equation