Question

help @vocaloid

Answer 1

1. steps to find the dot product:

a: multiply the x-coordinates together
b: multiply the y-coordinates together
c. add up the answers from steps a and b

Answer 2

c

Answer 3

good

same thing for 2), just convert the vectors into <1,2> vector form

Answer 4

but there's no answer choice for 2 if you did 1*2?

Answer 5

even if you added it no answer choice

Answer 6

<1,2> dot <1.2>

= 1^2 + 2^2 = ?

Answer 7

okay so 5

Answer 8

good

for 3) the magnitude is the square root of the dot product so sqrt([sqrt(45)])

Answer 9

for 4) you would first calculate 2u by doubling the coordinates of u, then calculate the dot product of 2u and v using the same method as the first problem

Answer 10

-9
12

Answer 11

-3 * 2 is -6 not -9

so your new vector 2u is

2u = <-6,12>

v = <1, 2>

then calculate the dot product of these two vectors

Answer 12

oh crap

Answer 13

hold on

Answer 14

-6
12
-6
24
18 final answer

Answer 15

i squared 3 oops

Answer 16

good, 18 is your sol'n