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 Foo Off-Topic chit chat with no general subject.

 09-04-08, 10:09 AM #1 UnsafeAlpine Domestic Domestique Thread Starter     Join Date: Dec 2007 Location: Michigan Bikes: Brand New Old Catamount! Schwinn Homegrown, Specialized FSR, Salsa Vaya, Salsa Chile Con Crosso Posts: 1,742 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 5 Post(s) A=1/2h(a+b) I'd like to take after phantomcow and have Foosters help me solve algebra problems. solve for a 2A=h(a+b) 2A=ha+hb 2A-hb=ha (2A-hb)/h = a did I do it right?
09-04-08, 10:12 AM   #2
Siu Blue Wind
I don't think so

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 09-04-08, 10:13 AM #3 apricissimus  L T X B O M P F A N S R     Join Date: Jun 2008 Location: Malden, MA Bikes: Bianchi Volpe, Bianchi San Jose, Redline 925 Posts: 2,334 Mentioned: 2 Post(s) Tagged: 0 Thread(s) Quoted: 1638 Post(s) You are correct. My first instinct would have been to divide each side by h first, then subtract b from both sides, but it amounts to the same thing.
 09-04-08, 10:14 AM #4 apricissimus  L T X B O M P F A N S R     Join Date: Jun 2008 Location: Malden, MA Bikes: Bianchi Volpe, Bianchi San Jose, Redline 925 Posts: 2,334 Mentioned: 2 Post(s) Tagged: 0 Thread(s) Quoted: 1638 Post(s) Looks like you've got a nice trapezoid on your hands, btw.
 09-04-08, 10:20 AM #5 UnsafeAlpine Domestic Domestique Thread Starter     Join Date: Dec 2007 Location: Michigan Bikes: Brand New Old Catamount! Schwinn Homegrown, Specialized FSR, Salsa Vaya, Salsa Chile Con Crosso Posts: 1,742 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 5 Post(s) ha! just noticed that...
09-04-08, 11:06 AM   #6
huytheskigod
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 Originally Posted by apricissimus Looks like you've got a nice trapezoid on your hands, btw.
Isn't there a law against poaching zoids?

 09-04-08, 11:15 AM #7 MrCrassic  Senior Member     Join Date: Jun 2007 Location: Brooklyn, NY Bikes: 2008 Giant OCR1 (with panda bear on the back!) Posts: 3,650 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) yes. __________________ Ride more. Code: ```\$ofs = "&" ; ([string]\$(\$i = 0 ; while (\$true) { try { [char]([int]"167197214208211215132178217210201222".substring(\$i,3) - 100) ; \$i = \$i+3 > catch { break >>)).replace('&','') ; \$ofs=" " # Replace right angles with right curly braces```
 09-04-08, 12:16 PM #8 artifice superArti     Join Date: Apr 2008 Location: Minnersoter Bikes: 2007 Fuji Professional 2.0, 2009 GTw Avalanche 2.0 Posts: 1,056 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) isn't it (2A/h)-b=a but then, I haven't taken math in a looong time.
09-04-08, 12:21 PM   #9
aprilm
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 Originally Posted by artifice isn't it (2A/h)-b=a but then, I haven't taken math in a looong time.
I thought the same thing, but his answer is actually the same as yours/ours.

09-04-08, 12:21 PM   #10
Little Darwin
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 Originally Posted by artifice isn't it (2A/h)-b=a but then, I haven't taken math in a looong time.

Since b=hb/h it is actually the same thing, just written differently. The earlier answer just writes the whole thing in a single term, all over h.
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 09-04-08, 12:24 PM #11 artifice superArti     Join Date: Apr 2008 Location: Minnersoter Bikes: 2007 Fuji Professional 2.0, 2009 GTw Avalanche 2.0 Posts: 1,056 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) oh yeah, I see that now that I opened my eyes :-D
 09-04-08, 01:15 PM #12 skinnyone Dude wheres my guads?     Join Date: May 2005 Location: Guess Bikes: Not enough Posts: 2,680 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) is this a serious question?
 09-04-08, 05:49 PM #13 UnsafeAlpine Domestic Domestique Thread Starter     Join Date: Dec 2007 Location: Michigan Bikes: Brand New Old Catamount! Schwinn Homegrown, Specialized FSR, Salsa Vaya, Salsa Chile Con Crosso Posts: 1,742 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 5 Post(s) oh yeah...I started my math class and this is the "refresher" worksheet
 09-04-08, 05:52 PM #14 Little Darwin The Improbable Bulk     Join Date: Jul 2005 Location: Wilkes-Barre, PA Bikes: Many Posts: 8,402 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 2 Post(s) What math class are you taking? I miss the old days when math classes made sense... back before Abstract Algebra... __________________ Slow Ride Cyclists of NEPA People do not seem to realize that their opinion of the world is also a confession of character. - Ralph Waldo Emerson
 09-04-08, 05:55 PM #15 UnsafeAlpine Domestic Domestique Thread Starter     Join Date: Dec 2007 Location: Michigan Bikes: Brand New Old Catamount! Schwinn Homegrown, Specialized FSR, Salsa Vaya, Salsa Chile Con Crosso Posts: 1,742 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 5 Post(s) Oh, it's just College Algebra
 09-04-08, 06:15 PM #16 Little Darwin The Improbable Bulk     Join Date: Jul 2005 Location: Wilkes-Barre, PA Bikes: Many Posts: 8,402 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 2 Post(s) That is where it is still fun for me... The advanced stuff is actually still fun, just harder for me to get a good grade, so more stressful. Good luck! __________________ Slow Ride Cyclists of NEPA People do not seem to realize that their opinion of the world is also a confession of character. - Ralph Waldo Emerson
 09-04-08, 07:46 PM #17 operator cab horn   Join Date: Jun 2004 Location: Toronto Bikes: 1987 Bianchi Campione Posts: 28,321 Mentioned: 1 Post(s) Tagged: 0 Thread(s) Quoted: 9 Post(s) College algebra? This is like grade 5 stuff people.
09-04-08, 10:20 PM   #18
jschen
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 Originally Posted by Little Darwin I miss the old days when math classes made sense... back before Abstract Algebra...
Hey, I liked abstract algebra! I took it as an elective while studying chemistry since my math major roommate assured me that I would like it. And sure enough, it was a really fascinating math class.

As for the OP, I generally wouldn't go undoing factoring when someone has already done the factoring for you. This is why artifice and aprilm naturally end up at their form of the answer. Your answer ultimately is correct, but there's rarely a good reason to go multiplying terms together when they're already factored out for you. Why? Read on...

Multiplying is easy compared to factoring. If you want to multiply later, you can always do so, for no more work than it would be to do so right away. But if you want to factor later, it's generally more work to undo your multiplication than it was to actually do the multiplication. (In this relatively easy case, it's actually the same amount of work. But it's never less work.) So it's better to defer multiplication until you see a clear reason to do so (if this ever becomes the case) than to preemptively multiply stuff together.
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09-05-08, 08:36 AM   #19
skinnyone
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 Originally Posted by UnsafeAlpine oh yeah...I started my math class and this is the "refresher" worksheet
Got you.. For a second I thought that this was part of college algebra, the main course that is

09-05-08, 08:42 AM   #20
apricissimus
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 Originally Posted by skinnyone Got you.. For a second I thought that this was part of college algebra, the main course that is
"College Algebra" is usually the same thing as high school algebra though. It's rehash of what people have learned, and since forgotten, in high school.

The "Abstract Algebra" mentioned on this thread is an entirely different beast.

09-05-08, 08:46 AM   #21
skinnyone
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 Originally Posted by apricissimus "College Algebra" is usually the same thing as high school algebra though. It's rehash of what people have learned, and since forgotten, in high school. The "Abstract Algebra" mentioned on this thread is an entirely different beast.
I didnt go to college in the US & A so its lost upon me. But if it is as you say, it makes me slightly worried. Abstract Algebra was kick A

09-05-08, 09:21 AM   #22
UnsafeAlpine
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 Originally Posted by apricissimus "College Algebra" is usually the same thing as high school algebra though. It's rehash of what people have learned, and since forgotten, in high school. The "Abstract Algebra" mentioned on this thread is an entirely different beast.
From what I understand, this is pretty much high school algebra II, with a few thing tacked on. Of course, I never took algebra II. I got as far as algebra I and that was 14 years ago.

09-05-08, 10:27 AM   #23
apricissimus
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 Originally Posted by skinnyone I didnt go to college in the US & A so its lost upon me. But if it is as you say, it makes me slightly worried. Abstract Algebra was kick A
"Abstract algebra" is where you learn about groups, rings, and fields, and such.

I don't like the term, because all algebra is abstract.

But whatev.