Questions on Algebra: Introduction to vectors, addition and scaling answered by real tutors!

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Question 88100: Find the dot product of vector v and vector w if:
v=-5i+6j and w=-2i-3j+
is it -8?: Find the dot product of vector v and vector w if:
v=-5i+6j and w=-2i-3j+
is it -8?
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
v=(-5 6) and w=(-2 -3).. both should be column vectors (ie one number on top of the other but i cannot write this here.

v.w = (-5x-2) + (6x-3)
v.w = +10 - 18
v.w = -8

so, yes you are correct :-)

cheers
Jon