[10:18:17] Ben Johnson joined.
[10:26:52] Ben Johnson beeped rotorhead.
[10:27:10] Ben Johnson beeped rotorhead.
[10:34:46] CatherineChoi joined.
[10:35:14] Ben Johnson: hello there.
[10:35:20] CatherineChoi: hey
[10:35:33] Ben Johnson: good morning.
[10:35:44] CatherineChoi: mm...still tired :p
[10:35:54] Ben Johnson: yea...me too.
[10:37:07] Ben Johnson: im soooo far behind on hw.
[10:37:22] Ben Johnson: and i still havent really worked on da nabu thing...
[10:38:02] CatherineChoi: yeah me neither
[10:38:14] Ben Johnson: can u help me on some hw problems?
[10:38:23] Ben Johnson: i got stuck a lot.
[10:38:45] CatherineChoi: sure
[10:39:25] CatherineChoi: which ones
[10:39:38] Ben Johnson: ok...um...hw47...WE#34
[10:39:46] Ben Johnson: p.244
[10:40:29] CatherineChoi: oh uhm.
[10:41:00] CatherineChoi: i sorta left that one blank..
[10:41:09] Ben Johnson: ok then...moving on...
[10:41:27] Ben Johnson: p.247...
[10:41:46] Ben Johnson: WE# 30 and 32...hw48
[10:42:55] CatherineChoi: hang on brb...my computer is being really weird right now
[10:43:00] Ben Johnson: mk...
[10:46:34] CatherineChoi joined.
[10:46:34] CatherineChoi left.
[10:46:42] CatherineChoi: ok i think it should work now..
[10:46:56] CatherineChoi: ok so for number 30
[10:47:14] Ben Johnson: mmhmm...
[10:47:17] CatherineChoi: i just said that r=x-y..but i'm not entirely sure if it's right
[10:47:42] Ben Johnson: ok...how did u get that?
[10:48:01] CatherineChoi: um because you're basically switching the stuff arround..
[10:48:09] CatherineChoi: and since there isn't an "r" in the second one
[10:48:19] CatherineChoi: the x-y should be the r
[10:49:29] Ben Johnson: ok...why should the x-y be the r?
[10:49:53] CatherineChoi: because x-y isn't in the first one...and r isn't in the second one, so it's like substitution
[10:52:45] Ben Johnson: ok...well...iono...im still confused...i was thinking that...since on the first one it says r/s...on the second one you could say. s/r...therefore rx-ry=sx+xy.....
[10:53:10] Ben Johnson: if you cross multiply...
[10:53:30] CatherineChoi: umm
[10:53:37] CatherineChoi: but there isn't an r in the second one
[10:54:34] Ben Johnson: .....i dunno.
[10:54:42] CatherineChoi: okay so in the first one
[10:54:47] Ben Johnson: i really dont get that one...
[10:54:56] CatherineChoi: it's "x+y/y=r/s"
[10:55:04] Ben Johnson: ok.
[10:55:15] CatherineChoi: in the second one, it's "x-y/x+y=s/y"
[10:55:29] CatherineChoi: and instead of the "r" in the second one, it has "x-y"
[10:55:30] Ben Johnson: ok.
[10:56:12] CatherineChoi: well i sorta guessed on this one ..
[10:56:52] Ben Johnson: ok...moving on...lol.
[10:56:59] Ben Johnson: 32.
[10:57:30] CatherineChoi: i think if you just cross multiply the first one, it should work
[10:57:54] CatherineChoi: or use one of the properties to switch things around and then cross multiply
[10:58:01] Ben Johnson: AAAHHH!
[10:58:05] Ben Johnson: I GET IT!!!
[10:58:08] CatherineChoi: lol..
[10:58:11] Ben Johnson: so r=x-y
[10:58:11] CatherineChoi: ok :p
[10:58:14] CatherineChoi: uhm yeah.
[10:58:17] Ben Johnson: lol.
[10:58:17] CatherineChoi: but i'm not too sure..
[10:58:26] Ben Johnson: no..no...ur right.
[10:58:31] CatherineChoi: lol okie..
[10:58:43] Ben Johnson: ok...32...
[10:58:59] CatherineChoi: i didn't really get that one either
[10:59:09] CatherineChoi: but hang on i'm gonna try something different w/ that one..
[10:59:15] Ben Johnson: mk...
[11:01:46] CatherineChoi: ok i got it
[11:01:51] Ben Johnson: yay!
[11:01:56] CatherineChoi: lol ok so uhm first
[11:02:11] CatherineChoi: ok well go on page 245
[11:02:20] CatherineChoi: and look at the box w/ the properties of proportions
[11:02:25] Ben Johnson: k.
[11:02:42] CatherineChoi: use prop. 1b to switch around the stuff in the first proportion
[11:03:09] Ben Johnson: k...lemme do that...
[11:03:58] Ben Johnson: k.
[11:04:04] Ben Johnson: now what?
[11:04:16] CatherineChoi: ok wait what did you get after switching them around ?
[11:04:35] Ben Johnson: a+c/a-c+b+d/b-d
[11:04:43] Ben Johnson: *=
[11:04:43] CatherineChoi: ok yeah
[11:04:46] CatherineChoi: and now
[11:04:53] CatherineChoi: just cross multiply
[11:04:58] CatherineChoi: using FOIL
[11:05:10] Ben Johnson: k...one sec...
[11:07:08] Ben Johnson: um...i got ab-ad-cd+cb=ab-ad-bc-cd.
[11:07:37] CatherineChoi: okay now cancell the things you can cancell out
[11:07:52] CatherineChoi: like "ab" and "ab cancell out if you subtract one to the other side
[11:08:36] Ben Johnson: ok...that the only one that can cancel.
[11:08:45] CatherineChoi: uh..
[11:08:56] CatherineChoi: "-cd" and "-cd" cancell out too
[11:09:03] CatherineChoi: and so does "-ad" and "-ad"
[11:09:07] CatherineChoi: oh wait.
[11:09:20] CatherineChoi: i thnik you did something wrong in the multiplying part..
[11:09:28] Ben Johnson: yea...probably...
[11:11:14] Ben Johnson: ok so...(a+c)(b-d)=(a-c)(b+d) right?
[11:11:25] CatherineChoi: yeah
[11:12:46] Ben Johnson: and u get....ab-ad+bc-cd=ab+ad-bc-cd....right?
[11:13:02] CatherineChoi: yeah