- #1

MozAngeles

- 101

- 0

## Homework Statement

for what value of a will the vectors u=<2,4,-5> and v=<-4,-8,a>

## Homework Equations

(uXv)=0

## The Attempt at a Solution

i took the cross product and got 4(a-10)i-2(a-10)j-32k=0

i don't know wher eto go from there do i set a-10=0 solve for a so my answer is ten?