Consider two vectors A=3i - 1j and B = - i - 5j, how do you calculate #abs(A+B)#?? Precalculus Vectors in the Plane Vector Operations 1 Answer ali ergin Mar 12, 2016 #|A+B|=sqrt40# Explanation: #Delta x=A_x+B_x=3-1=2# #Delta y=A_y+B_y=-1-5=-6# #|A+B|=sqrt(Delta x^2+Delta y^2)# #|A+B|=sqrt(2^2+(-6)^2)# #|A+B|=sqrt(4+36)# #|A+B|=sqrt40# Answer link Related questions Question #b4ef9 What is meant by a component of a vector? How do I find the vertical component of a vector? How do i find the horizontal component of a vector? Is vector addition commutative? What happens when I multiply a vector by itself? What is the definition of vector addition? How do I do vector subtraction? What is a velocity vector? How can the law of cosines be used to find the magnitude of a resultant? See all questions in Vector Operations Impact of this question 1588 views around the world You can reuse this answer Creative Commons License