Turn on thread page Beta
 You are Here: Home >< Maths

# Linear Programming Question (Further Maths) watch

1. Unsure about the answer to a lengthy linear programming question. To sum it up: the optimal solution was (6,7) and this question asks you to then reduce the time for a constraint based on this solution. I found that the constraint 7x+8y=112 could be reduced, as 7*6+8*7 = 98. So I did 112-98 = 14 hours time reduction, however the mark scheme says the answer is 7 hours and does not explain why.

Please could someone explain why the actual answer is half of mine?
2. (Original post by Hughcifer)
Unsure about the answer to a lengthy linear programming question. To sum it up: the optimal solution was (6,7) and this question asks you to then reduce the time for a constraint based on this solution. I found that the constraint 7x+8y=112 could be reduced, as 7*6+8*7 = 98. So I did 112-98 = 14 hours time reduction, however the mark scheme says the answer is 7 hours and does not explain why.

Please could someone explain why the actual answer is half of mine?
Without seeing the question and markscheme, I can only guess.

My guess would be that the original constraint was , and it was doubled to produce the one you have. So, the 112, represents half-hours, rather than hours.
3. (Original post by ghostwalker)
Without seeing the question and markscheme, I can only guess.

My guess would be that the original constraint was , and it was doubled to produce the one you have. So, the 112, represents half-hours, rather than hours.
Gosh darn it was. You my man are a genius, thank you.

Turn on thread page Beta
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 13, 2018
Today on TSR

### Uni league tables

Do they actually matter?

### University open days

• University of Exeter
Undergraduate Open Days - Exeter Campus Undergraduate
Wed, 24 Oct '18
• University of Bradford
Faculty of Health Studies Postgraduate
Wed, 24 Oct '18
• Northumbria University
Wed, 24 Oct '18
Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

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