Mr. O'Leary

Comments

• Miguel

  Hello Mr O'leary!
  I have a problem finding a Text Book Scavenger Hunt sheet, i think i don't have it. Can you please tell me where i can find it on this web-site and print it?
  Thank you!

  9/5/2009 2:46:32 PM
• MrOLeary

  Good afternoon, Miguel,
  
  Good catch. I never did get around to posting that file on the site - sorry. And I don't think I have a copy of that file here at home - only on the network at school.
  
  There is a chance that I will be at PVI on Monday. If I make it in there, I will post the file then and post a follow up here. If not, well, just enjoy your long weekend a little more, and we will deal with it on Tuesday.
  
  Thanks.

  9/5/2009 5:25:44 PM
• Miguel

  I appreciate your answer.

  9/5/2009 7:17:16 PM
• Brandon Luxenburg

  Hello Mr. O'Leary,
  I had a quick question on the homework.
  on hotmath it says the fallowing to a problem that is trying to find a perpendicular line to the line given to us:
  It says
  y – 3 = 1(x – 0)
  Then,
  x – y = –3
  
  Why wouldn't it be y - x = 3?

  10/13/2009 7:07:01 PM
• MrOLeary

  Good Evening, Brandon,
  
  Well, those two answers are actually identical. Your answer is y - x = 3. Shift that around so it is in Ax + By = C - the standard order for Standard Form. It becomes -x + y = 3. Now, multiply everything by -1, and you get x - y = -3 which is the HotMath answer.
  
  Which brings me to a point that I should have raised in class today - if I didn't, please remind me to on Thursday. Standard Form, we know, must have the A, B and C as integers. Well, our book doesn't stress it, but many books ALSO require that for Standard Form, A be positive! This would also explain the Hot Math answer.
  
  Hope that helps. Have a good night.

  10/13/2009 8:25:30 PM
• Brandon Luxenburg

  Thank you for getting back to my question so soon. Yes, that does clear it up for me. So that means that the coefficient of x must always be possitve correct?

  10/13/2009 8:31:42 PM
• MrOLeary

  Our book does not stress that 'A' must be positive, and I didn't exactly stress it in class either. So for now, I can't hold you to it. Later in the year, when we do Standard Form of a Quadratic Equation, the book does put more emphasis on it.
  
  Now, I just did a quick search on Standard Form, just to see what's out there. The first hit is from a site called Algebra Lab, and it says this:
  
  Ax + By = C
  A, B, C are integers (positive or negative whole numbers)
  No fractions nor decimals in standard form.
  Traditionally the "Ax" term is positive.
  
  Notice that it says "traditionally". So I would say it is a good habit to get into, but I won't stress about it.

  10/13/2009 8:53:04 PM
• Miguel Kardenas

  Hello Mr O'Leary!
  
  I just wanted to ask you what is our homework due 11/02/09?
  

  10/30/2009 6:44:38 PM
• MrOLeary

  Good evening, Miguel,
  
  I will be updating the homework page over the weekend, and your homework won't be due until Tuesday. If I recall, the homework was:
  
  p. 156, # 3 - 36 every 3rd
  p. 150, # 1 - 6 all
  
  Yes, some of this you have already started. I want to spend time going over the stuff before I have it due.
  
  Hope this helps.
  
  Mr. O'Leary

  10/30/2009 9:44:32 PM