Results 1 to 4 of 4

Math Help - Grade 9 Math Help

  1. #1
    Newbie
    Joined
    Jan 2009
    Posts
    2

    Grade 9 Math Help

    Missed today's class due to being stuck sick in bed. I have a quiz tomorrow on Consecutive Integer Problems using fractions in the word problems. Can you help me with the following question? The larger of two consecutive odd integers is 4 less than 1/3 the smaller. Find the numbers.
    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    May 2006
    Posts
    244
    Quote Originally Posted by anabanana View Post
    Missed today's class due to being stuck sick in bed. I have a quiz tomorrow on Consecutive Integer Problems using fractions in the word problems. Can you help me with the following question? The larger of two consecutive odd integers is 4 less than 1/3 the smaller. Find the numbers.
    Thanks
    Two consecutive odd integers always take the form 2k+1,\ 2k+3 for some integer k.

    You are told that

    2k+3=\frac{(2k+1)}{3} - 4

    Which you now solve for k, and hence for the two numbers (don't be supprised if one or both are negative)

    .
    Last edited by mr fantastic; January 9th 2009 at 01:30 AM. Reason: Made the fraction more obvious
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Grandad's Avatar
    Joined
    Dec 2008
    From
    South Coast of England
    Posts
    2,570

    Integers

    Hello anabanana
    Quote Originally Posted by anabanana View Post
    Missed today's class due to being stuck sick in bed. I have a quiz tomorrow on Consecutive Integer Problems using fractions in the word problems. Can you help me with the following question? The larger of two consecutive odd integers is 4 less than 1/3 the smaller. Find the numbers.
    Thanks
    Suppose that the smaller odd integer is n; then the next larger one will be (n+2).

    So: (n+2) is 4 less than \frac{1}{3} of n.

    In other words: n+2 = \frac{1}{3}n - 4

    Add 4 to both sides; multiply both sides by 3; then ...?

    Can you solve it now? (The answer is a negative odd integer.)

    Grandad
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Jan 2009
    Posts
    2

    Problem solved

    Thank you! I should ace this quiz today.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Grade ten math
    Posted in the Algebra Forum
    Replies: 8
    Last Post: January 19th 2011, 05:53 AM
  2. Grade 10 math Help
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 13th 2010, 07:16 PM
  3. Need help Grade 11 math
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: August 21st 2008, 11:19 AM
  4. 3rd Grade Math Help
    Posted in the Algebra Forum
    Replies: 5
    Last Post: March 3rd 2008, 07:06 PM
  5. Using proportions (7th grade math)
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: February 26th 2008, 05:17 PM

Search Tags


/mathhelpforum @mathhelpforum