Question

If 2x-2y=6 is parallel to 9y=bx +12, what is b?

Answer 1

Think about it, what do 2 straight lines need to be pararell?

Answer 2

it's that they don't intersect?

Answer 3

Yes, they never intersect, and what does it matematically mean?

Answer 4

they have something in common..

Answer 5

remember, the slope!

Answer 6

They have the same slope.

Answer 7

Pls. explain...

Answer 8

ok

Answer 9

You have the equation of a line, which is usually given in the general form Ax+By+c=0

Answer 10

\[Slope=m=\frac{ -coefficient \ of \ x }{ coefficient \ of \ y }\]

Answer 11

in your case, you have it put in a different way, with the y solved, that's what we call the explicit form of the equation of the line

Answer 12

and so, to calculate the slope DIRECTLY just by seeing the equation, we have a trick

Answer 13

IF they give you the equation in the general form, Ax+By+c = 0, the slope is -A/B

Answer 14

Now, if you have it in the explicit form, y=mx+n, what would be the slope in there? try it

Answer 15

@AmberCat21 Do you even get a word.

Answer 16

Tic Tac Tic Tac

Answer 17

@GCR92 Always try to simplify it dude.

We need to make it look as simpler as possible :P

Answer 18

Thanks, I know what you mean, but the ammount of concepts that one needs to DOMINATE to really know math is so big that sometimes i just can't explain something in 2 words

Answer 19

Amber you still alive?

Answer 20

Well amber left :P

Answer 21

should we answer or wait for him to come back @hba

Answer 22

Well,giving direct answers or providing the whole solution is not allowed on OS @GCR92

We do not want the answerers to do all the work,we would like the asker to participate in the solution though :)

Answer 23

@hba got it, thanks, let just see if he comes back.

Answer 24

@GCR92 Hmm :)