Maths help

This is a general chat forum, you must register to post.

Moderators: Moderators, User administrators

Forum rules
Please remember that this is a family forum - do not post 'adult' content. Full forum rules here.

Maths help

Postby Sir Brixalot » 02 Dec 2019, 18:48

Image

My 12 year old got this. She said the teacher said the answers is X. I don’t get that answer. Its been decades since I did algebra so I’ve probably forgotten the method
Sent from my iPhone using Tapatalk
1989 Autosleeper Auto 1-9 DG with LPG conversion
Sir Brixalot
 
Posts: 3980
Joined: 15 Oct 2010, 21:55
Location: Brixton Town
80-90 Mem No: 8927

Re: Maths help

Postby scottbott » 02 Dec 2019, 19:22

bugger me that may has well been written in greek, thankfully I have never needed any of this type of thing and got to retirement without it
Nil carborundum illegitimi
scottbott
 
Posts: 2326
Joined: 07 Jan 2009, 20:36
Location: Old Somerby,Grantham
80-90 Mem No: 6085

Re: Maths help

Postby silverbullet » 02 Dec 2019, 19:23

The x² terms cancel each other out, 3/24= 1/8....

What was the question again ? :D

Sent from my S60 using Tapatalk
'85 syncro Caravelle twin slider, '90 SA Microbus project

http://www.025motorsport.com
User avatar
silverbullet
Trader
 
Posts: 12011
Joined: 08 Jun 2009, 09:51
Location: Surrey Syncronaut #156
80-90 Mem No: 6908

Re: Maths help

Postby silverbullet » 02 Dec 2019, 19:29

So that's (8x+y)/(8+3xy)

8/8 cancels out, leaving

x+y/3xy

Sent from my S60 using Tapatalk
'85 syncro Caravelle twin slider, '90 SA Microbus project

http://www.025motorsport.com
User avatar
silverbullet
Trader
 
Posts: 12011
Joined: 08 Jun 2009, 09:51
Location: Surrey Syncronaut #156
80-90 Mem No: 6908

Re: Maths help

Postby Syncronorth » 02 Dec 2019, 19:42

1983 camper 1.9 DG 1985 transporter syncro 1.9 DG and one 1985 8-seater syncro 2. 1 DJ
User avatar
Syncronorth
 
Posts: 49
Joined: 18 May 2018, 15:01
80-90 Mem No: 0
What is the fourth number in this list?: 209

Re: Maths help

Postby Swebby » 02 Dec 2019, 19:57

Expand the top bracket and then rearrange. Image

Sent from my BBB100-2 using Tapatalk
1987 1.9 DG pop-top
User avatar
Swebby
 
Posts: 190
Joined: 20 Jun 2018, 17:14
Location: Essex
80-90 Mem No: 16589
What is the fourth number in this list?: 209

Re: Maths help

Postby silverbullet » 02 Dec 2019, 20:04

Explains why I failed my second year A level maths about 30 years ago...

Sent from my S60 using Tapatalk
'85 syncro Caravelle twin slider, '90 SA Microbus project

http://www.025motorsport.com
User avatar
silverbullet
Trader
 
Posts: 12011
Joined: 08 Jun 2009, 09:51
Location: Surrey Syncronaut #156
80-90 Mem No: 6908

Re: Maths help

Postby Sir Brixalot » 02 Dec 2019, 20:26

I got that answer on an algebraic calculator. I thought it was 2x so I must’ve getting too carried away with the cancelling out. This problem is meant to find the depth of an h shaped prism. Seems very hard for a year 8
1989 Autosleeper Auto 1-9 DG with LPG conversion
Sir Brixalot
 
Posts: 3980
Joined: 15 Oct 2010, 21:55
Location: Brixton Town
80-90 Mem No: 8927

Re: Maths help

Postby Swebby » 02 Dec 2019, 20:28

Yep since the new GCSEs came in a lot of stuff seems to have moved from A Level to GCSE to KS3 etc.

Sent from my BBB100-2 using Tapatalk
1987 1.9 DG pop-top
User avatar
Swebby
 
Posts: 190
Joined: 20 Jun 2018, 17:14
Location: Essex
80-90 Mem No: 16589
What is the fourth number in this list?: 209

Re: Maths help

Postby AngeloEvs » 02 Dec 2019, 20:33

I just substituted values of 1 for x and 2 for y , the answer =1 since x=1 using my values then the answer must be x.
1987 DG Karisma LPG with remodelled interior
User avatar
AngeloEvs
 
Posts: 970
Joined: 22 Nov 2007, 19:22
Location: Upwell, Norfolk
80-90 Mem No: 4709

Re: Maths help

Postby Syncronorth » 02 Dec 2019, 20:35

I really recommend the YouTube channel tecmath

https://youtu.be/dIo1jfLlRKI might even be relevant for the T25
1983 camper 1.9 DG 1985 transporter syncro 1.9 DG and one 1985 8-seater syncro 2. 1 DJ
User avatar
Syncronorth
 
Posts: 49
Joined: 18 May 2018, 15:01
80-90 Mem No: 0
What is the fourth number in this list?: 209

Re: Maths help

Postby 937carrera » 02 Dec 2019, 23:50

Swebby wrote:Expand the top bracket and then rearrange.


:ok

I'm going through a similar process with my daughter at the moment - I look forward to the extension homework questions :oops: . Going through scale transformations at the moment, the maths teacher has a question back because the online software doesn't seem to allow drawing of the correct answer. Keeps the old grey matter alive :)
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine
User avatar
937carrera
 
Posts: 3083
Joined: 05 Apr 2015, 19:29
Location: N Yorks.
80-90 Mem No: 16333

Re: Maths help

Postby Splurt » 03 Dec 2019, 09:32

Bodmas rule.

It explains the order of operations to solve an expression. According to Bodmas rule, if an expression contains brackets ((), {}, []) we have to first solve or simplify the bracket (in this case multiply it out) followed by solving the orders (powers and roots etc.), then division, multiplication, addition and subtraction from left to right.

Sounds more complicated than it is! Just logical steps. The youtube tutorials mentioned above will hopefully provide the eureka moment.

I loved Maths. When it clicks its great and its either right or wrong. The main reason I didn't study it further was that I didn't want to be a teacher or to be stuck in an office. It also doesn't lend itself to the partying that Uni would involve. I remember not being able to solve things on a monday morning after having a few the previous saturday. By friday the brain would be firing on all cylinders again!
89 - 1.8T AGU - Hightop SA Syncro

'I love my brick'
Fr Jack Hackett
User avatar
Splurt
 
Posts: 35
Joined: 09 May 2011, 22:51
Location: Co.Armagh, Ireland
80-90 Mem No: 9694

Re: Maths help

Postby Timburrows » 03 Dec 2019, 10:10

I think the X just ment wrong answer
Timburrows
 
Posts: 257
Joined: 05 Jun 2014, 12:49
Location: Shipton Under Wychwood
80-90 Mem No: 14187

Re: Maths help

Postby Sir Brixalot » 03 Dec 2019, 10:57

It's now Bidmas apparantly. I've ordered a GCSE textbook. Looks like I've got maths homework now
1989 Autosleeper Auto 1-9 DG with LPG conversion
Sir Brixalot
 
Posts: 3980
Joined: 15 Oct 2010, 21:55
Location: Brixton Town
80-90 Mem No: 8927

Next

Return to General Chat

Who is online

Users browsing this forum: Williambrown and 5 guests