Turn on thread page Beta
    • Thread Starter
    Offline

    1
    ReputationRep:
    Would someone please be able to tell me the way to work out this question for full marks with working :

    The length in centimetres , of the sides of a quadrilateral are :

    2x x+6. 4x-12. 30-3x

    Explain why x must be greater than 3 and less than 10. Use the information to write an equation in terms of x (perimeter is 48cm)
    Offline

    18
    ReputationRep:
    (Original post by loulou<3)
    Would someone please be able to tell me the way to work out this question for full marks with working :

    The length in centimetres , of the sides of a quadrilateral are :

    2x x+6. 4x-12. 30-3x

    Explain why x must be greater than 3 and less than 10. Use the information to write an equation in terms of x (perimeter is 48cm)
    Length cannot be negative (or zero, otherwise it would be a triangle)

    so look at 4x-12 to get your minimum value for x

    and look at 30-3x to get your maximum value of x
    Offline

    22
    ReputationRep:
    (Original post by loulou<3)
    Use the information to write an equation in terms of x (perimeter is 48cm)
    sum of lengths of sides = ?
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by DylanJ42)
    Length cannot be negative (or zero, otherwise it would be a triangle)

    so look at 4x-12 to get your minimum value for x

    and look at 30-3x to get your maximum value of x
    Thank you ☺️
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 6, 2016
The home of Results and Clearing

3,613

people online now

1,567,000

students helped last year

University open days

  1. SAE Institute
    Animation, Audio, Film, Games, Music, Business, Web Further education
    Thu, 16 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Fri, 17 Aug '18
  3. University of Bolton
    Undergraduate Open Day Undergraduate
    Fri, 17 Aug '18
Poll
Will you be tempted to trade up and get out of your firm offer on results day?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.