my math is becoming rusty

[shawn_16]

I haven't taken any math courses for a year and i'm in anal math can anyone help me out?
I know this crap is easy but I'm retarded and have done this stuff before but I have forgotten!

1)solve for y: 2 - 4/y = 16/y^2
answers y= 4, -2 <--- can't seem to come up w/ them


2)Find the equation, in standard form, of the line that goes through the point (-3, -3.5) and is parallel to the line 6x - 5y = 12

answer y = 1.2x + 0.1 can't come up w/ the answer either...

 

[BA]

1. Multiply everything by y^2, which will give you a quadratic equation. I'll smack you if you can't solve that.

2. Point slope form (y-y0)=m(x-x0). Parallel=same slope

 

[Napalm381]

First one: Multiply through by y^2 and you have a quadratic eqn. Solve as usual.

Second one: Rearrange 6x-5y=12 to y = 1.2x - 2.4. Slope there is 1.2. So you need an eqn for a line w/slope 1.2 and going thru (-3,-3.5). You should be able to take it from there.

 

[yakko]

WD40.

 

[Napalm381]

No yakko, you should really try Tri-Flow or Finish Line

 

[Unsickle]

White lightning is good if it's muddy.

 

[yakko]

Napalm381,

I have been using Finish Line for over 10 years. WD40 could be part of his equation though.

Unsickle,

I found Finish Line to be better in plain mud but when it is full of clay the White Lightning is better.

 

[shawn_16]

Cool, I just got one more question:



<< So you need an eqn for a line w/slope 1.2 and going thru (-3,-3.5). >>

<--- how the hell do you do that again?

Thanks to all who responded and to those in advance who might respond to this last part

 

[Napalm381]

<< 2. Point slope form (y-y0)=m(x-x0). Parallel=same slope >>

Plug your point and slope into that eqn and rearrange as necessary.

 

[derek]

If you can't solve that equation you are retarded and should go back to junior high school