Question

Let u = <-8, -9>. Find 7u
I think it's <-56, -63> but the lesson didn't explain it at all and i want to be sure.

Answer 1

Yes, you're right.
Scalar multiplication just has you multiplying the scalar (in this case, 7) to all the components of the vector :)

Answer 2

thanks, that was my guess but the lesson said absolutely nothing about how to solve any of the problems.

Answer 3

Good intuition :)