Login

Search the forums now!

Welcome, Guest. Please login or register.

November 05, 2025, 01:29:35 am
Pages: [1] 2   Go Down

Author Topic: mathematical expression  (Read 2748 times)  Share 

0 Members and 1 Guest are viewing this topic.

googoo

  • Victorian
  • Forum Regular
  • **
  • Posts: 57
  • Respect: 0
mathematical expression
« on: May 19, 2010, 09:33:18 pm »
0
Write a mathematical expression for the statement 'y is greater than double of x by 3'.

This is a year 7/8 question, and it is not a trick question. I just want to know how you interpret the statement. Thanks.
Logged

superflya

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1763
  • EL-Heat.
  • Respect: +8
Re: mathematical expression
« Reply #1 on: May 19, 2010, 09:47:02 pm »
0
y> 2x/3
Logged
2010- English, Methods (CAS), Physics, Specialist, Chem.
2011- Bachelor of Commerce/Aerospace Engineering - Monash


"The day i stop learning, is the day i walk away from the game" Michael Jordan.

mark_alec

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1173
  • Respect: +30
Re: mathematical expression
« Reply #2 on: May 19, 2010, 09:56:40 pm »
0
Logged

Blakhitman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1954
  • Respect: +7
Re: mathematical expression
« Reply #3 on: May 19, 2010, 10:06:34 pm »
0
y>6x????

lol can't remember if 'by' means multiply or divide...Shows how good I am at maths ><.
Logged

crayolé

  • Victorian
  • Forum Leader
  • ****
  • Posts: 788
  • Respect: +3
Re: mathematical expression
« Reply #4 on: May 19, 2010, 11:00:19 pm »
0
y > 6x

my little cousin was saying 3 by 5 is 15 the other day and i believe him over all of you >;]
Logged

m@tty

  • Victorian
  • ATAR Notes Legend
  • *******
  • Posts: 4324
  • Respect: +33
  • School: Heatherton Christian College
  • School Grad Year: 2010
Re: mathematical expression
« Reply #5 on: May 19, 2010, 11:03:52 pm »
0
.

Quote from: googoo on May 19, 2010, 09:33:18 pm
Write a mathematical expression for the statement 'y is greater than double of x by 3'.

This is a year 7/8 question, and it is not a trick question. I just want to know how you interpret the statement. Thanks.

I believe this is saying "y [y] is[=] greater by three[+3] than the double of x [2x]".

EDIT: Fixed equality.
« Last Edit: May 21, 2010, 04:26:47 pm by m@tty »
Logged
2009/2010: Mathematical Methods(non-CAS) ; Business Management | English ; Literature - Physics ; Chemistry - Specialist Mathematics ; MUEP Maths

96.85

2011-2015: Bachelor of Aerospace Engineering and Bachelor of Science, Monash University

2015-____: To infinity and beyond.

kamil9876

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1943
  • Respect: +109
Re: mathematical expression
« Reply #6 on: May 19, 2010, 11:07:59 pm »
0
y=2x+3.

To demonstrate what I mean let, x=1 and therefore y=5. It is true, as far as my understanding of english goes, that:

"5 is greater than 2 by 3"

but 2="double of 1"

so

"5 is greater than double of 1 by 3"
Logged
Voltaire: "There is an astonishing imagination even in the science of mathematics ... We repeat, there is far more imagination in the head of Archimedes than in that of Homer."

crayolé

  • Victorian
  • Forum Leader
  • ****
  • Posts: 788
  • Respect: +3
Re: mathematical expression
« Reply #7 on: May 20, 2010, 04:33:01 pm »
0
Oh I seee, ignore what i said then ;]

I interpreted it as
y [y] is greater than [>] double of x [2x] by
  • 3 [ 3]

Logged

tram

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1341
  • Respect: +22
Re: mathematical expression
« Reply #8 on: May 20, 2010, 05:28:50 pm »
0
Quote from: crayola on May 19, 2010, 11:00:19 pm
y > 6x

my little cousin was saying 3 by 5 is 15 the other day and i believe him over all of you >;]

this is how i woud've interpreted it, but all the other ways to interpret it are just as valid with the right reasoning

however i think for it to be y>2x+3, it needed to be worded "'y is greater by three than double of x"
Logged

Blakhitman

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1954
  • Respect: +7
Re: mathematical expression
« Reply #9 on: May 20, 2010, 06:02:44 pm »
0
Quote from: crayola on May 20, 2010, 04:33:01 pm
Oh I seee, ignore what i said then ;]

I interpreted it as
y [y] is greater than [>] double of x [2x] by
  • 3 [ 3]
same!
Logged

vea

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1099
  • Respect: +29
  • School Grad Year: 2011
Re: mathematical expression
« Reply #10 on: May 20, 2010, 06:35:52 pm »
0
I'm sure "by 3" means multiply but now I'm really confused :|
Logged
2011: ATAR 99.50
2012: Bachelor of Biomedicine, UoM
2015: Doctor of Dental Surgery, UoM

the.watchman

  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2526
  • Respect: +10
Re: mathematical expression
« Reply #11 on: May 20, 2010, 06:46:30 pm »
0
I agree with 2x+3, but the question is a little ambiguous

This should clear it up
'...' is greater than '...' by 3
9 is greater than double 3, by 3
y is greater than double x, by 3
Logged
Remember, remember the 5th of November

2010 - MM CAS (47) - Cisco 1+2 (pass :P)
2011 - Eng - Phys - Chem - Spesh - Latin - UMAT
ATAR - 99.00+ plz... :)

Feel free to PM me for anything :D

crayolé

  • Victorian
  • Forum Leader
  • ****
  • Posts: 788
  • Respect: +3
Re: mathematical expression
« Reply #12 on: May 20, 2010, 11:20:49 pm »
0
LOL I find it funny how a year 7/8 question is causing us so much trouble
Logged

TrueTears

  • TT
  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 16363
  • Respect: +667
Re: mathematical expression
« Reply #13 on: May 22, 2010, 11:48:42 pm »
0
Quote from: kamil9876 on May 19, 2010, 11:07:59 pm
y=2x+3.

To demonstrate what I mean let, x=1 and therefore y=5. It is true, as far as my understanding of english goes, that:

"5 is greater than 2 by 3"

but 2="double of 1"

so

"5 is greater than double of 1 by 3"
yeah this would be my interpretation too, very solid reasoning behind it too.
Logged
PhD @ MIT (Economics).

Interested in asset pricing, econometrics, and social choice theory.

tram

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1341
  • Respect: +22
Re: mathematical expression
« Reply #14 on: May 23, 2010, 08:31:48 am »
0
Quote from: TrueTears on May 22, 2010, 11:48:42 pm
Quote from: kamil9876 on May 19, 2010, 11:07:59 pm
y=2x+3.

To demonstrate what I mean let, x=1 and therefore y=5. It is true, as far as my understanding of english goes, that:

"5 is greater than 2 by 3"

but 2="double of 1"

so

"5 is greater than double of 1 by 3"
yeah this would be my interpretation too, very solid reasoning behind it too.

still not convinced.......
Logged
Pages: [1] 2   Go Up