Turn on thread page Beta
    • Thread Starter
    Offline

    1
    ReputationRep:
    Hi

    I am stuck on how to work out the inequalities:



    Image from OCR 4736 January 2005 Exam Paper

    So far:

    x>=0
    y>=0 (i think)

    how do i work out the rest?
    • Thread Starter
    Offline

    1
    ReputationRep:
    Anyone?
    Offline

    1
    ReputationRep:
    y<[equation of line]
    y<[other equation of line]

    done
    Offline

    1
    ReputationRep:
    Work out the equations of all the boundary lines. Then test points ((0,0) and (1,1) usually work best) to see which way the inequalities go. Do you have your exam on Monday 25th?
    • Thread Starter
    Offline

    1
    ReputationRep:
    thanks, yes my exams on the 25th
    Offline

    0
    ReputationRep:
    Don't forget to check to see if its a dotted line and therefore > or <
    If its a solid line then >= or <=
    • Thread Starter
    Offline

    1
    ReputationRep:
    Update:

    Hi

    Just to check what ive done wrong

    (3,0) (0,4)

    m = 4/-3 => -4/3

    y-0=-4/3(x-3)
    y=-4/3x + 4

    test (0,3)

    3=-4/3x0 + 4
    3=4

    3<=4

    y<=-4/3x + 4
    3y<=-4x+12

    however does it make any difference that the answer is 4x+3y<=12

    will it gain the same answer?
    Offline

    0
    ReputationRep:
    hey every one umm i am doing AQA D1 exam on Tuesday, and i am really worried about pseudo instructions as I have no idea what they are so would any one guide me to where i would possibly learn this
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 16, 2010
Poll
Cats or dogs?
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.