Results 1 to 3 of 3

Math Help - where I went wrong

  1. #1
    Newbie
    Joined
    Dec 2009
    Posts
    4

    Question where I went wrong

    I did poorly on my last test and would like to know where, these are the questions I got wrong:

    1. Simplify: -16ab¯²
    8a¯³b

    2. Subtract: (2x³ - 7x² + 5x) – (6x³ + 2x² - 5x)

    3. Simplify: x² + 3x – 4
    x² + x – 12

    4. Solve: 3(v – 4) -2 = 6(v + 3)

    5. Solve: 2x + 7 < 3 – 2(x + 1)

    6. Find the equation of the line that contains the point (2, -5) and has slope ¼.

    7. Let f = 3x – 1 and g(x) = X³ - 3x find (f – g)(2).

    8. Find the inverse of the function. If the function does not have an inverse function, write “no inverse function)”. (6, 9), 7, -4), (5, 1), (1, 5)

    9. Present Value: Mike Brone is planning on purchasing a new car in 2 years and wants to have $4500 for a down payment. How much money must he deposit today into an account that earns a 6.5% interest rate, compounded quarterly, to reach his goal?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor alexmahone's Avatar
    Joined
    Oct 2008
    Posts
    1,074
    Thanks
    7
    Please show your working.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Dec 2009
    From
    marlton
    Posts
    16
    Quote Originally Posted by grmamatina View Post
    I did poorly on my last test and would like to know where, these are the questions I got wrong:

    1. Simplify: -16ab¯²
    8a¯³b

    2. Subtract: (2x³ - 7x² + 5x) – (6x³ + 2x² - 5x)

    3. Simplify: x² + 3x – 4
    x² + x – 12

    4. Solve: 3(v – 4) -2 = 6(v + 3)

    5. Solve: 2x + 7 < 3 – 2(x + 1)

    6. Find the equation of the line that contains the point (2, -5) and has slope ¼.

    7. Let f = 3x – 1 and g(x) = X³ - 3x find (f – g)(2).

    8. Find the inverse of the function. If the function does not have an inverse function, write “no inverse function)”. (6, 9), 7, -4), (5, 1), (1, 5)

    9. Present Value: Mike Brone is planning on purchasing a new car in 2 years and wants to have $4500 for a down payment. How much money must he deposit today into an account that earns a 6.5% interest rate, compounded quarterly, to reach his goal?
    this my check see and check it.where I went wrong-manh.jpg
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] am I wrong here or is my textbook wrong??
    Posted in the Algebra Forum
    Replies: 5
    Last Post: September 25th 2011, 05:13 PM
  2. IVP, what am I doing wrong?
    Posted in the Differential Equations Forum
    Replies: 4
    Last Post: February 9th 2010, 11:17 PM
  3. Replies: 6
    Last Post: August 12th 2009, 02:15 AM
  4. Why am I wrong?!
    Posted in the Calculus Forum
    Replies: 1
    Last Post: April 18th 2009, 07:34 PM
  5. Wrong answer key or wrong me ?
    Posted in the Algebra Forum
    Replies: 2
    Last Post: July 2nd 2008, 04:42 AM

Search Tags


/mathhelpforum @mathhelpforum