The sum of the interior angles in any given quadrilateral is always going to be 360.
This means each angle inside the quadrilateral added up with always equal 360 degrees.
Hope this helps!
Brainliest is always appreciated if you feel its deserved! :)<span />
If I am not wrong after graphing it the line should be vertical.. meaning that y=0 and it should be around 3.064
Y=-3x-11. you add the one to the other side making the equation y=-3(x+4)+1
then you distribute making it y=-3x-12+1
The answer is

. I've demonstrated the 'split and combine' method in the image attached.
This principal is based on the fact that you can multiply and divide radicals as you would with regular integers, but you remember that the answers remain as radicals unless the number you're dealing with is a square (e.g. 9, 16, 25).