Question

Find the specified vector or scalar. Show your work.

u = -4i + 1j and v = 4i + 1j; Find ‖u+v‖.

Answer 1

@Directrix

Answer 2

u+v=(-4+4)i+(1+1)j=0i+2j
so
\[||u+v||=\sqrt{0^2+2^2}=2\]

Answer 3

how do you know if its a vector or scalar?

Answer 4

in u and v you have i. j components so its definitely vector
but the norm is a scalar quantity..
It determines the scalar length only

Answer 5

thank you can you help with some more?

Answer 6

give me the question. i have 5 mins in my hand

Answer 7

Find the reference angle for the given angle. Show your work.

-404°

Answer 8

or Find the x-intercepts (if any) for the graph of the quadratic function.

6x2 + 12x + 5 = 0

Give your answers in exact form. Show your work.

Answer 9

you have to solve for x

Answer 10

solve and write the answer

Answer 11

okay what about for the first one?

Answer 12

for the first one add 360 to the given angle until it lies in between 0 and 360 degree

Answer 13

we have -404+360=-44
-44 doesnot lie in between 0 and 360
so add 360 again
-44+360=316 degree

Answer 14

@heather8

Answer 15

i got to go. bye

Answer 16

thank you!!