Answer:
c.)14
Step-by-step explanation:
it's just C.)14
9
9v = 9(2i + 9j) = 18i + 81j
|9v | = = = 9
5x - 13 = x+19
5x-x=19+13
4x=32
x=32/4
x=8
Cb=5x-13
=5×8-3
=40-3
CB=37
AB=X+19
=8+19
AB=27