Results 1 to 4 of 4

Math Help - Work problem: No solution yet

  1. #1
    Newbie
    Joined
    Nov 2009
    Posts
    5

    Question Work problem: No solution yet

    Please help me with the second part of this problem as I am really stuck. I have the equations listed after the problem, but don't think they are correct.

    Please help me solve this at the latest by tomorrow morning. Thanks


    I) Anticipating significant growth i n the air travel industry, you placed orders
    totaling $2100 million to purchase new aircraft that would seat a total of
    4500 passengers. Some of the aircraft were Boeing 747s that cost $200
    million each and seat 400 passengers and Boeing 777s that cost $160 million
    each and seat 300 passengers. Others are European Airbus A321s that cost
    $60 million and seat 200 passengers. At the time you were instructed to
    buy twice as many US manufactured aircraft as foreign aircraft.

    a) Given the selection of three aircraft, how many of each type of aircraft did
    you order?

    II) Due to recent economic conditions you have been told to alter the order
    for new equipment you made several years ago. The new aircraft had
    not been received and placed into service yet because of the long lead
    time to manufacture such complex and sophisticated equipment. The
    revised budget for new aircraft is now $1810 million for 800 fewer total
    passenger seats. At this point in production Boeing charges $40 million
    for each 747 aircraft canceled and $35 million for each 777 aircraft
    canceled. In a similar fashion Airbus charges $20 million for each A321
    aircraft canceled.

    b) Given that all other criteria remain the same, how many of each type of
    aircraft did you cancel?



    For part B I got the following equations:

    1) -40x-35y-20z=290
    2) 400x+300y+200z=3700
    3) x+y-2z=0

    I am getting the following for:

    x= 113
    y= -132
    z=-9.5

    but these numbers don't make any sense. I think I have done something wrong. Please help.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Dec 2007
    From
    Ottawa, Canada
    Posts
    3,110
    Thanks
    68
    Quote Originally Posted by pilot View Post
    Please help me solve this at the latest by tomorrow morning.
    You said that on Nov 10th, on SAME problem :
    http://www.mathhelpforum.com/math-he...d-problem.html
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Nov 2009
    Posts
    63
    Quote Originally Posted by pilot View Post
    Please help me with the second part of this problem as I am really stuck. I have the equations listed after the problem, but don't think they are correct.

    Please help me solve this at the latest by tomorrow morning. Thanks


    I) Anticipating significant growth i n the air travel industry, you placed orders
    totaling $2100 million to purchase new aircraft that would seat a total of
    4500 passengers. Some of the aircraft were Boeing 747s that cost $200
    million each and seat 400 passengers and Boeing 777s that cost $160 million
    each and seat 300 passengers. Others are European Airbus A321s that cost
    $60 million and seat 200 passengers. At the time you were instructed to
    buy twice as many US manufactured aircraft as foreign aircraft.

    a) Given the selection of three aircraft, how many of each type of aircraft did
    you order?
    i'll try the first one....
    it's related with simultaneous equation...

    let,
    Boeing 747s=x
    Boeing 777s=y
    Airbus A321s=z

    200x+160y+60z=1200 (the total cost)
    400x+300y+200z=4500 (the seat)
    x+y-2z=0 (buy twice as many US manufactured aircraft as foreign aircraft)

    use elimination or substitution method to find the values of x,y and z...

    x=5
    y=5
    z=5

    .....hope it help.....
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Nov 2009
    Posts
    5

    Word problem...no solution yet

    Thanks for the answer to the first part, but I had the answer for that. I was asking for the second part which I am stuck with if you or anybody else can help. Thanks
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. work problem
    Posted in the Calculus Forum
    Replies: 2
    Last Post: December 18th 2010, 12:53 PM
  2. work problem
    Posted in the Algebra Forum
    Replies: 1
    Last Post: December 14th 2009, 05:57 PM
  3. A work problem...
    Posted in the Algebra Forum
    Replies: 1
    Last Post: August 12th 2009, 04:32 PM
  4. work problem
    Posted in the Calculus Forum
    Replies: 0
    Last Post: June 5th 2008, 07:23 PM
  5. work problem
    Posted in the Algebra Forum
    Replies: 1
    Last Post: May 25th 2008, 07:51 PM

Search Tags


/mathhelpforum @mathhelpforum