Answer:
B
Step-by-step explanation:
if BU and BN weren't congruent, then the two triangles couldn't be proved to be congruent
Answer:
B. 
Step-by-step explanation:
GIven that
and
, and that point M is the midpoint of AB, the midpoint can be determined as a vectorial sum of A and B. That is:

The location of B is now determined after algebraic handling:


Then:




Which corresponds to option B.
Answer:
I believe it would be either the 30° or the 60° the image is a little blurry .
Answer: -0.903
Step-by-step explanation:
D:11a+8b and the other factor would be 11a-8b