Evaluate the expression. r = < 9, -7, -1> , v = < 2, 2, -2> , w = < -5, -2, 6> v ⋅ w a) < -18, 14, -2> b) -26 c) 1 d) < -10, -4, -12>

In general if 
u = <a,b,c>
v = <d,e,f>
then
u dot v = a*d + b*e + c*f = dot product of the two vectors
In words: multiply the x coordinates together, then the y together and then z together. Finally add up those three products

So,
v dot w = <2,2,-2> dot <-5,-2,6>
v dot w = 2*(-5) + 2*(-2) + (-2)*6
v dot w = -10 - 4 - 12
v dot w = -26

B) -26

25. 22 + 1 2 25