Question

Which of the following is the conjugate of a complex number with 2 as the real part and -8 as the imaginary part?

-2 + 8i
2 + 8i
2 - 8i
-2 - 8i

Answer 1

@ganeshie8 2-8i?

Answer 2

thats your original given complex number
not the conjugate

Answer 3

then would it be 2+8i?

Answer 4

yes! for conjugate you just flip the sign of imaginary part

Answer 5

can you check 2 more for me :D?

Answer 6

What is the equation in point-slope form of the line passing through (-3, -4) and (0, 2)?

(y - 8) = 2(x - 3)
(y + 3) = -2(x + 4)
(y - 2) = -2(x + 4)
(y + 4) = 2(x + 3)

Answer 7

http://www.scs.sk.ca/cyber/elem/learningcommunity/math/math30aa/curr_content/matha30rev1/lesson3-4/PONITSLOPEFORMULA.JPG

Answer 8

i get y=2x+2

Answer 9

thats right, but they just want the point slope form

Answer 10

did you get slope = `2` ?

Answer 11

yes

Answer 12

very good, next pick a point and plug them in the point-slope formula

Answer 13

y-y1=mx(x-x1)

m=2
y1=-4
x1=-3

plug in the formula

Answer 14

^

Answer 15

y + 4 = mx(x +3)

Answer 16

oops

Answer 17

(y +4) = 2(x+3)

Answer 18

Right :D

Answer 19

ok thank you! and this last one which i forgot how to do
Find the average rate of change for the given function from x = -3 to x = 1.

Answer 20

2, -3, -1, -2 are answer choices

Answer 21

average rate of change between two points is same as the slope of secant line between those points

Answer 22

where is your function ?

Answer 23

can't get picture to post, I'll write it out

Answer 24

x: -3, 0, 1
y: -3, 3, 5

Answer 25

simply find the slope between those two given points

Answer 26

x: ` -3`, 0, `1`

y: ` -3`, 3, `5`

Answer 27

(-3, -3) and (1, 5)

Answer 28

2

Answer 29

mx = 2

Answer 30

Yes! slope of the line joinng both the points is called the average rate of change of function between those two points

Answer 31

you're done! 2 is the average rate of change

Answer 32

I didn't know all you had to do was find the slope haha

Answer 33

thanks again, i just found 2 more that i could use some help with because i forgot the material. do you have time?

Answer 34

sure, post them as new thread..

Answer 35

okay