1. Dismiss Notice
  2. Guest, be sure to check out How To Get Into Dental School, our free downloadable PDF with step-by-step details for dental school applicants!
    Dismiss Notice
  3. Dismiss Notice
  4. Download free Tapatalk for iPhone or Tapatalk for Android for your phone and follow the SDN forums with push notifications.
    Dismiss Notice

math destroyer test 2 #40

Discussion in 'DAT Discussions' started by Vsno123, Aug 5, 2011.

  1. Vsno123

    Joined:
    Jun 24, 2011
    Messages:
    105
    Likes Received:
    2
    Status:
    Pre-Dental
    I think I'm missing something because this seems like an easy problem to solve:

    What is the largest possible value of x in the expression |16-2x| is less than or equal to 4?

    The answer says to flip the equation to |2x-16|. I see that those two are equal but why do you have to flip the equation to solve this problem?
     
  2. Note: SDN Members do not see this ad.

  3. PooyaH

    2+ Year Member

    Joined:
    Apr 24, 2008
    Messages:
    804
    Likes Received:
    0
    Status:
    Pre-Dental
    If it was to stay at l16-2xl then the highest x could be was 6. But when you change it to l2x-16l, now the highest x value would be 10. And obviously since 10 is greater than 6, it is the highest possible x value.
     
  4. Vsno123

    Joined:
    Jun 24, 2011
    Messages:
    105
    Likes Received:
    2
    Status:
    Pre-Dental
    ok well that make sense lol... I guess I'll solve these absolute inequalities both ways and just pick the highest out of the two answers. thanks!
     

Share This Page