Use the given vectors to find the indicated quantities. u = 〈2, −5〉, v = 〈−3, −4〉, w = 〈2, −1〉 .

Question

4u ∙ v = ___

Answer 1

4u•v= 4<2,-5>•<-3,-4> = 4(-6 + 20) = 4·14 = 56

Answer 2

Same problem as before,,

the answer is 56