Answer:
b. <-87,33>
Explanation:
We are given that:
u = <-5,1>
v = <7,-4>
We want to get 9u-6v
First we will calculate the 9u and 6v separately and then subtract the 6v from the 9u as follows:
9u = 9*<-5,1> = <9*-5 , 9*1> = <-45,9>
6v = 6*<7,-4> = <6*7 , 6*-4> = <42,-24>
Finally:
9u - 6v = <-45,9> - <42,-24> = <-45-42 , 9--24> = <-87,33>
Hope this helps :)
