Write the vector as a linear combination of the unit vectors i and J V = (4, -8) O V= 41-8) O V= 41+8) O V=-41 - 8) O v= 41+ 8] O V=-121 + 3] 12. Choose the best answer. Let u = -i - 5j and v = -21 - 6j Find u + V O -31 + 4) -51 +7) -21 - 8j 31 -7j 51 -2j