Question

Let u = <-4, -3>. Find the unit vector in the direction of u, and write your answer in component form

Answer 1

unit vector u = vector u / magnitude u

vector u = (-4, -3)
magnitude u = 5

unit vector u = (-4,-3) / 5

unit vector u = 1/5(-4i -3j)

Answer 2

where i is your unit vector x component, and j is your unit vector y component

Answer 3

ask if you get lost anywhere

Answer 4

great thank you:)
do you know this one?
Let u = <7, -3>, v = <-9, 5>. Find 4u - 3v

Answer 5

it's a scalar multiplied by a vector, which is the same as distributive property with normal numbers.

Answer 6

put it in component form, so it's similar to distributing normal numbers.

4( 7i -3j) - 3(-9i +5j)

Answer 7

ok! thank you so much:)

Answer 8

when i did that i didnt get any of these answers:(
<55, -27>

<1, 3>

<16, 12>

<-8, -6>
@petewe

Answer 9

it is one of those answers, you prob made a calculation error. try it again

Answer 10

oh! 55 -27:)