Question

Let u = <-8, -9>. Find 7u. (2 points)

<-56, 63>

<-56, -63>

<56, -63>

<56, 63>

Answer 1

Multiplying a vector by a scalar means to multiply each coordinate of the vector by said scalar.

So, we must multiply both entries by 7:

`u=(-8, -9)\implies 7u=(-8\cdot 7, -9\cdot 7) = (-56, -63)`