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Mrs Tibble’s / Mr Atkins’ Year 9253 comments to Mrs Tibble’s / Mr Atkins’ Year 9 |
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Harriet,
What is a whole number?!!!!!!
JT
PS yes
thanks but if it was 5.625 instead of 5.125 then would it turn to 6 or just stay as 5?
Harriet
sorry it i have just realised it would be 6….. wouldn’t it?
Harriet
Dear Mrs Tibble,
I know you might not get this since it is the holiday but i am doing my maths revision and going over the transformations exam paper and i have tried to get the right answers but for question 7A i didn’t understand whey i got the thrid bit wrong, i put rotation at the point (3,3) but it must be a rotation because they are facing different ways. also for the first question i put it has been rotated clockwise on the point (0,0) for 90 degrees and again got it wrong but i don’t understand why. Then for the very last question i tried to correct it but don’t know if i have got it right. So is the answer:
Triangle R: the top left hand corner is at the point (3,-2) then the bottom left hand corner is at the point (3,-4)and then the top right hand point is 4 squares tot eh right of the top left hand corner so is at (7,-2)
Triangle S: the top right hand corner is at point (-3,2) then the bottom right hand corner is at point (-3,1) and then the point of the triangle is at the point (-5,1)
Trinagle W: the top left hand corner would be at point (-1,2) the bottom left hand corner would be at point (-1,1) and then the point of the triangle would be at(1,1).
Triangle X: the top left hand corner would be at (-4,0) the bottom left hand corner would be at (-4,-1) and the point of the triangle at (-2,-1)
I know that is a lot to read and if you don’t understand the i can come and find you at school.
Thanks
Harriet
Hi Harriet,
I don’t have the paper with me so I can’t look at those questions for you. Sorry.
All I can suggest is that you use tracing paper for the rotations. To see why you got your answers wrong, trace the shape, pin your paper down at the point you said it was, and then turn the paper 90 degrees (or whatever it is). The tracing should be exactly over the image. It won’t be if you are pinning it down in the wrong place.
Does that help?
Have fun!
JT
Hi.
Thanks….yes it help! You might not know but is there anything on the maths revision booklet that we don’t have to revise?
Harriet
Hi Harriet,
Sorry, don’t know what’s on your list. Is there anything there you haven’t covered? If not, learn it all! Have fun.
JT
hi.
Yes there is ratio and proportion but its got something like the equation n:1 and m:1 and we haven’t covered it.I don’t know if we still have to learn it?
Harriet
Hi Harriet,
When it’s in the form
something : 1
it means you aren’t restricted to whole numbers – you have to make the one they say equal to 1.
Just divide everything by that number.
eg if things are in the ratio 3:2, that is in it’s simplest form, but if you need it in the format n:1, then you have to make the 2 into a 1 so divide everything by 2
so 3:2 = 1.5:1
Does that help?
JT
ohh…. thank you so much i get it the first time…IM A GENIUS! also i don’t think we have done interpreting y=mx+c (this is all under coordinates and graphs) and also drawing simple quadratic graphs and graphs of the form y=a/x… were we meant to (if we haven’t) do it with you or mr atkins?
Harriet
If you’ve done it, it would be with Mr A as I have done all the shape and space stuff with you.
Have you done straight line graphs? m = gradient, c = the y intercept? That’s what interpreting y=mx+c means.
JT
I can’t remember what are they meant to look like the only graphs I remember doing are the ones that you have to fill in using an equation, I think they are called Linear Graphs? If we haven’t done it will it be in the exam?
Harriet
If there are no powers on the x, it’s a staright line.
If it’s x-squared, it’s a parabola (like a smiley)
If it’s a/x then y gets smaller as x increases and it curves downwards.
Have a look on here for some info
http://www.bbc.co.uk/schools/gcsebitesize/maths/algebra/graphsrev4.shtml
PS If you haven’t done it, then I expect it won’t be on the paper.
I think Mr A had taught everything off the paper.
Hi Mrs Tibble,
I think this is the wrng website for the Maths Blog cos i think it is the old 1, is that right??????
I really want a revision paper to help me revise but it wont seem to let me, do you no what has happened to the other website??
Zoe,
This is the right website. Go to revision at the top of the page and then Years 7-10, then find the JAN mock papers at the bottom of the lists.
JT
Oh cos it says on the revision guide that its: http://www.shsmaths.wordpress.com. But thank you anyway!!
Zoe
It shouldn’t have the wordpress bit.
However, Zoe, the correct URL should be written in the front cover of your maths book!!
It is also on notices around the maths dept so you should have absorbed it by diffusion!!!!!
Hi, I have the mock exam paper for the exams- is there a mark scheme that I could mark it with? Thank you
Hi, i am stuck on qu 5a of todays homework. I don’t really know how to do it. The question is Peter Pauland Mary buy lottery tickets in the ratio 2:3:4. They share their winnings in the same ratio. How much do they each recieve if they win £10.
Do you have to add the ratio and then do something with it??
hi
for question 3B on todays homework do we have to work out what they give the charity for just one week or both weeks added together?
the question is
Melissa gives £10 to charity the next week. How much does lucke give?
Hi Harriet,
Don’t have book here but it sounds like it means in the next week.
JT
Hi.
pleaseee could you help me 
Im really stuck on the hw qu3
mrs Tibble please could you help me!!
the question is…………
Luke and Melisaa give 10% of their take home pay to charity.
The ratio of their take home is 5:4.
a) Luke gives £10 to charity one week. How much does Melissa give?
b) Melissa gives £10 to charity the next week. How much does Luke give?
c) One week the total they gave to charity was £10.80. Wok out their take home pay that week.
I sort of have an idea but im totally sure!!!!
zoe, do you know how to do qu. 5???
Hi Zoe,
a) luke: melissa = 5 : 4 (given)
Multiply both of these by 2 to scale it up so that Luke’s side is 10. The other number is then Melissa’s.
b) same but this time scale up melissa’s side to 10 (if you do it to 20 then halve, you might find it easier)
c) you might find it easier to work in pence. 5+4=9. What do you need to multiply by to turn 9 into 1080? Do that to the numbers.
Hope that helps.
JT
Amelia,
You’ll need to type out the question – I’ve left my book in school.
I have typed the question. It is above harriet’s comment that she made today
Hi Amelia,
Are you sure it’s 2:3:4? And is the total £10 or what one of them gets? I’m asking cos the numbers aren’t very nice if you’re correct!
JT
the total is £10 and the ratio is 2:3:4. The book isn’t nice……
OK.
If the ratio is 2:3:4 then the number of parts is 9 (2+3+4)
Scale it up x10 to make no of parts 90 (cos that’s easy to turn into 10!)
Scale it down by factor 9 to get your total 10.
When you add up the parts, you get £9.99 rather than £10.
i dont understand. how do you get the answer for how much each person recieves??
When you have divided by 9, the numbers are your answers.
so do i divide the 20, 30 and 40 by nine??
Yes, that’s right. Round to 2 dp as it’s money.
ohhhhh, so how would i do it for the total being £84??
Same way.
so i scale up by 84 then divide by 9??
Or, since 9×9=81 you can share out 81 pounds easily, then turn the remaining 3 pounds into pence and share out the pence.
i see, but if i wanted to make life difficult could i do that, because then you have to do £5ooo then 2 million?
lol! You have an evil teacher don’t you!
2+3+4 = 9
so if you divide by 9 the total is 1
then multiply by what you want the final total to be.
Think that’s easier – especially if you just put the whole sum into the calculator rather than doing it in stages. Up to you!
I am just getting confused now. If i did 9×84 where would i go from there?
NOOOOO WAIT I THINK I ACTUALLY GET IT!! if i did 9×84 that is the same as doing the 2:3:4x 84 so you divide that by nine, please say that is right or i am just going to give up
hi
i was looking at the answer that you gave to zoe about all three of the question for question 3 and for part b do you mean times it by 20 and then half it or you could just times it my 10 i on’t understand what you mean by scale up!
It’s right
Well done – that kind of perseverance will make a good A level mathematician!
lol, i will have to think about that path
Hi harriet,
If Luke:Melissa is 5:4, what do you need to multiply both of these by to make Melissa 20?
Since you actually want Melissa to be 10 rather than 20, you’ll then need to divide by 2.
Scaling up means multiplying by something – like you do when you need to cook for 12 when the recipe is for 4 (you scale it up x3)
sorry, and then for part c. do you add 5 and 4 to make 9 then divide 9 by 1080 and times that number by 5 and then by 4?
sorry