Question

Find a ⋅ b.

a = <7, 4>, b = <3, 5>

Answer 1

@jdoe0001 hey this is the last problem I need help with I promise :) but do u know a formula I could use to help me out??

Answer 2

WOuld I use the dot method??

Answer 3

yes, that looks like a dot to me

Answer 4

it's called a "dot product" by the way

Answer 5

Yes, exactly, it reads, a (dot) v and the formula is \[\Huge a=<v1,v2> *~b=<u1,u2>\]
Then \[\Large a~\dot~b=v1u1+v2u2\]

Answer 6

Ahh okay so 41???

Answer 7

thank you verdi much.

Answer 8

Yes, exactly! Remember a dot product yields a scalar ( a numbre) not a vector

Answer 9

Np, that's what we're here for :), and post as many questions as you want, that's what the site is for.