Maths year 11

Announcements Posted on
Four things that unis think matter more than league tables 08-12-2016
    • Thread Starter
    Offline

    2
    ReputationRep:
    Posted from TSR Mobile
    Attached Images
     
    Offline

    3
    ReputationRep:
    S1 is incorrect; you are not taking the 15 there because that would be the full length, you are taking x.
    S2 is correct.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    S1 is incorrect; you are not taking the 15 there because that would be the full length, you are taking x.
    S2 is correct.


    Posted from TSR Mobile
    Attached Images
     
    • Thread Starter
    Offline

    2
    ReputationRep:
    Posted from TSR Mobile
    Attached Images
     
    • Thread Starter
    Offline

    2
    ReputationRep:
    THIS ONE UPDATED


    Posted from TSR Mobile
    Attached Images
     
    Offline

    3
    ReputationRep:
    S2: That's incorrect. You need to use brackets; do 11\cdot (15-x) altogether which means 11(15-x)=11(15)+11(-x) as you distribute it into the brackets.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    S2: That's incorrect. You need to use brackets; do 11\cdot (15-x) altogether which means 11(15-x)=11(15)+11(-x) as you distribute it into the brackets.
    Now?


    Posted from TSR Mobile
    Attached Images
     
    Offline

    3
    ReputationRep:
    Yes that's correct. Do you understand WHY we need to use the brackets?
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Yes that's correct. Do you understand WHY we need to use the brackets?
    yes

    After this?


    Posted from TSR Mobile
    Attached Images
     
    Offline

    3
    ReputationRep:
    (Original post by z_o_e)
    yes

    After this?


    Posted from TSR Mobile
    Good. Well we are told that the area is 138, AND we found it to be in terms of x as -3x+165. So what can we do to these two?
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Good. Well we are told that the area is 138, AND we found it to be in terms of x as -3x+165. So what can we do to these two?


    Posted from TSR Mobile
    Attached Images
     
    Offline

    3
    ReputationRep:
    Correct method!
    ...but err... we were told the area is 138, not 135
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Correct method!
    ...but err... we were told the area is 138, not 135
    Oh :/

    Ha. At least I got the method ha ha.

    I wrote the 8 like a 5.
    Hehe.

    Any more questions?

    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by z_o_e)
    Oh :/

    Ha. At least I got the method ha ha.

    I wrote the 8 like a 5.
    Hehe.

    Any more questions?

    Posted from TSR Mobile
    Yep, I want you to work on your multiplication involving some x's.

    I know you can do 8\cdot x as you've demonstrated this and it's pretty straight forward.
    Try these, simplify them, make use of that multiplication table I've shown you if you think it will help

    Edit: I've added spoilers where the answers are, for you to check!

    (1) 6(x+1)
    Spoiler:
    Show
    6x+6

    (2) 9(2-x)
    Spoiler:
    Show
    18-9x

    (3) -5(5-3x)
    Spoiler:
    Show
    -25+15x

    (4) x(x+5)
    Spoiler:
    Show
    x^2+5x

    (5) 2x(3x+8)
    Spoiler:
    Show
    6x^2+16x

    (6) 3x(x^2+2x+1)
    Spoiler:
    Show
    3x^3+6x^2+3x

    (7) (x+1)(x+2)
    Spoiler:
    Show
    x^2+3x+2

    (8) (x-2)(x+3)
    Spoiler:
    Show
    x^2+x-6

    (9) (x-6)(x+4)
    Spoiler:
    Show
    x^2-2x-24

    (10)  (3x-1)(1-x)
    Spoiler:
    Show
    -3x^2+4x-1
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Yep, I want you to work on your multiplication involving some x's.

    I know you can do 8\cdot x as you've demonstrated this and it's pretty straight forward.
    Try these, simplify them, make use of that multiplication table I've shown you if you think it will help

    Edit: I've added spoilers where the answers are, for you to check!

    (1) 6(x+1)
    Spoiler:
    Show
    6x+6

    (2) 9(2-x)
    Spoiler:
    Show
    18-9x

    (3) -5(5-3x)
    Spoiler:
    Show
    -25+15x

    (4) x(x+5)
    Spoiler:
    Show
    x^2+5x

    (5) 2x(3x+8)
    Spoiler:
    Show
    6x^2+16x

    (6) 3x(x^2+2x+1)
    Spoiler:
    Show
    3x^3+6x^2+3x

    (7) (x+1)(x+2)
    Spoiler:
    Show
    x^2+3x+2

    (8) (x-2)(x+3)
    Spoiler:
    Show
    x^2+x-6

    (9) (x-6)(x+4)
    Spoiler:
    Show
    x^2-2x-24

    (10)  (3x-1)(1-x)
    Spoiler:
    Show
    -3x^2+4x-1
    Heyaa I used this method, the one I learnt in class as these questions were a bit easy
    I got 1 wrong and that was because I forgot to add the power.


    Posted from TSR Mobile
    Attached Images
      
    Offline

    3
    ReputationRep:
    (Original post by z_o_e)
    Heyaa I used this method, the one I learnt in class as these questions were a bit easy
    I got 1 wrong and that was because I forgot to add the power.


    Posted from TSR Mobile
    If they were easy then I'm surprised you were struggling with one in that question yesterday Well done.

    You should mark that paper you did (unless your teacher wants it handed it to him/her), and find a new one to practice
    There isn't much that I can see you need to improve on from the questions we did. Pick up a higher tier paper so you can push the D grade up or whatever level you're at. What exam board are you doing?
    • Thread Starter
    Offline

    2
    ReputationRep:
    Yeah

    I'm doing AQA.

    Posted from TSR Mobile
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    If they were easy then I'm surprised you were struggling with one in that question yesterday Well done.

    You should mark that paper you did (unless your teacher wants it handed it to him/her), and find a new one to practice
    There isn't much that I can see you need to improve on from the questions we did. Pick up a higher tier paper so you can push the D grade up or whatever level you're at. What exam board are you doing?


    Posted from TSR Mobile
    Attached Images
     
    Offline

    3
    ReputationRep:
    Bearing is the angle measured clockwise from North. So for the fourth one, even though the angle is 40 degrees, it's not 40 degrees clockwise.
    Offline

    3
    ReputationRep:
    Have a go at them first as you know what bearings are and how to get them.
 
 
 
Write a reply… Reply
Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: December 10, 2016
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.

Poll
Do you think you'll achieve your predicted A Level grades?
Study resources

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

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