AmberCat21
If 2x-2y=6 is parallel to 9y=bx +12, what is b?
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GCR92
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Think about it, what do 2 straight lines need to be pararell?
AmberCat21
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it's that they don't intersect?
GCR92
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Yes, they never intersect, and what does it matematically mean?
GCR92
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they have something in common..
GCR92
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remember, the slope!
GCR92
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They have the same slope.
AmberCat21
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Pls. explain...
GCR92
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ok
GCR92
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You have the equation of a line, which is usually given in the general form Ax+By+c=0
hba
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\[Slope=m=\frac{ -coefficient \ of \ x }{ coefficient \ of \ y }\]
GCR92
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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
GCR92
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and so, to calculate the slope DIRECTLY just by seeing the equation, we have a trick
GCR92
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IF they give you the equation in the general form, Ax+By+c = 0, the slope is -A/B
GCR92
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Now, if you have it in the explicit form, y=mx+n, what would be the slope in there? try it
hba
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@AmberCat21 Do you even get a word.
GCR92
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Tic Tac Tic Tac
hba
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@GCR92 Always try to simplify it dude.
We need to make it look as simpler as possible :P
GCR92
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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
GCR92
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Amber you still alive?
hba
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Well amber left :P
GCR92
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should we answer or wait for him to come back @hba
hba
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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 :)
GCR92
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@hba got it, thanks, let just see if he comes back.
hba
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@GCR92 Hmm :)