Which property of addition is shown in if x=1+2i and y-1-2i then x+y=0

Rename mixed numbers before you can subtract are what

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

50 points and will mark brainlest if you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking: