Algebra help

[Scolson]

This stuff is probably really easy but it's from the beginning of the year and i have no idea.

1)3-2i/4+3i

2)I thought i could solve this system by substituting but i fucked that up.

(3x-2y=7

(x+4y=7

and this one) f(x)= 3x^2 -1

 

[Scolson]

damn i pressed repply accidentally

this one) f(x)= 3x^2 -1 g(x)=2/x

f (little circle thingy here) g(4) is what i need

 

[Scolson]

bump i really need to pass.

 

[ThaLetterM.]

i just took my algebra II exam today and i gotta tell you...i have no idea about anything. sorry man.

 

[Travapple.]

help scot.......

hes growing a third ear......

 

[t-roy]

it's been 7 years since algebra, but #2 y=1 x=3 am i right? haha

 

[Scolson]

yeah, Im supposed to show work so i'll write down some garbage.

k thx

 

[kristie]

The second one is y=1.21 and x=5.79 I think.  

 

[Scolson]

#1 is multiple choice

6/25-7/25i

6/25-17/25i

18/5-17/5i

18/25-17/25i

 

[mauii]

2)I thought i could solve this system by substituting but i fucked that up.

3x-2y=7

x+4y=7

3(7-4y)-2y=7

21-12y-2y=7

-12y-2y=-14

y=(-14)/(-14)

y=1

x=3

 

[matty_chaines*]

algebra is soo gay

 

[Scolson]

yeah that's what I did but I messed up and ended up with some crazy assed decimal.

im dum

 

[zylstra]

*dumb

 

[Scolson]

yeah that's the symbol. i have no idea if you're right but you obviously know more than me i'll take your word for it

 

[Gavajabra2]

If its 3-2i/4+3i then just multiply it by the recipricle so: 3-2i/4+3i times 4-3i/4-3i

 

[mauii]

If thats what he meant, then thats right, except you forgot the -1 after 3/4

 

[Scolson]

see i told you

 

[killabees]

who are you!

 

[Scolson]

thanks for the help so far

 

[mauii]

I'm mauii

 

[killabees]

im tykeer, ive enever seen you berfofer>

 

[M+M]

this is correct, the answer should be....

((3-2i)/(4+3i))((4-3i/4-3i)=(12-9i-8i-6i^2)/(16+9i^2) i think, i did that mostly in my head, could be off

 

[comeatmebro]

haha idk why but i cant understand math on the computer. with like /=division and shit. and im actually smart too, oh well.

 

[Jhorski]

hell ya man, Calculus all the way

 

[Scolson]

it's ok guys its over. I was completely blown away about the score ig ot on the test

 

[Skierguy1234]

1)3-2i/4+3i

mult everything by 4

12-2i+12i

combine like terms

12+10i

i think that right, but im not sure.

 

[Rooddss]

very easy stuff, f(x) = y and then ill do the rest later haha