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Mr Brewin’s Year 9243 comments to Mr Brewin’s Year 9 |
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SNAP! Yes
YES!!! HOORAY THANKS MRS TIBBLE!!!!
i dont no how t plot the graph for 12d q4
i think its wrong
sorry get it now
I am stuck on q5 a & b on p253 Ex12d, can somebody help me please?
Actually never mind, I think I’ve got it now
hello
I am stuck on q5, 6 and 8 of ex 17G (pg377)
Im not sure because tan is confusing me becaus im not sure if you have to divide it and nothing is making sense!!! >:(
Nina
Hi, for the sheet you gave us on circle theorems, I don’t know what angle I’m trying to find for the 6th question as there isn’t an angle labled. Are you meant to find them all?
Sorry Pia – been out fixing a radiator! Guess it’s too late now, but just find the marked ones… the obvious ones!
I’m doing my maths homework on Solving Simultaneous Equations graphically. Please would you help me on questions 3(a)and (b) as my lines do not cross. Also would like help on questions 4(a), (b), (c) and (d)
Thanks, Lucy
Mr Brewin, please help!!!!!
hey, you know on the questions you gave us for revision. i really dont understand question 9.
Hi Megan,
Qu 9 is a graph plotting question.
You are given a algebraic formula that will work out the value of y for each value of x that you use.
These pairs of values of x and y can then be plotted on graph paper. With lots of points plotted you can link them up with a curved line to form your graph.
The formula was quadratic which looks something like y = x^2 + 3x – 4. (Note that x^2 means x squared.
If I let the value of x be 2 then I can work out y using the formula…
y = 2^2 + 3×2 – 4
So when we have x=2 we get y = 6
This means we can plot (2,6) on the graph.
You need to repeat this process for lots of values of x which will give you the points so you get the overall graph.
Try values of x from -5 to 5.
I hope that this helps!
MW
Yep, that does help. thanks.
and also on the revision guide it gives us clips for mathswatch that we havent learnt and i really dont understand e.g. clip 143, 145 :/
Hi Megan,
I don’t have the mathswatch CD so you’ll need to be more specific. However, if it’s stuff you haven’t done then leave it out.
JT
To Mr Brewin
I am having some trouble with the maths homework that you has set us! the question being ‘find the area of a hexagon inside a circle with the radius 5cm’. So far i have drawn the hexagon inside the circle i am a bit dazed of what to next! please help me
AmeliaP
Hi Amelia,
Your question makes more sense than Megan’s so I think I know what you mean.
The corners of your hexagon should be on the circumference of the circle, and if you draw lines from the centre to each corner, you’ll have 6 triangles. That should help lead you on to what to do next. (the lines will all be 5cm long)
JT
thank you very much mrss tibble
Amelia P
i really dont understand how to work out the area of a hexagon? :/
Break it up into triangles. Find the area of one and multiply the answer by 6.
oh, it sounds easier when u say it!
Lol Megan! 3 rhombuses would work too – and be different!
Where’s your sister? You aren’t making full use of your resources Megan
shes no help at all
mrs tibble i have drawn the 6 triangles but i am still a bit miffed of what step to do next
please help me
AmeliaP
mrs tibble dont worry i have worked the question out
AmeliaP
:p
Well done Amelia
i really dont understand how to work out the area of a hexagon in a circle radius 5cm and a pentagon in a circle radius 5cm ! :/
Phoebe, read the replies above for Megan and Amelia.
mr brewin may you please print of the test paper that we did in class today with the answers, so i can use them for revision, could you also please print of some revision sheets about working out the volume and the surface, with steps, thank you
Yes, that’s fine. Will do.
mr brewin i am really having some trouble grasping tree diagrams, may you please print of some revision sheets for me on tree diagrams.
Hi Amelia,
Here are some questions and worked solutions:
http://www.scribd.com/doc/30682070/Tree-Diagrams-Worksheet-probability-revision-from-GCSE-Maths-Tutor
Why don’t you try googling a topic if you are stuck, to see what you can find out for yourself?
Mrs T
thank you mrs tibble (^^^)
mr brewin i am having a lot of trouble on my maths homework! please can you help me its question 4a and 4b on page 77 on the level up maths 6-8
mr brewin since i am having a lot of trouble with the homework may i please see you one lunch time maybe friday or monday so you can help me with it?????
Hi Amelia,
Is this the question about going out for a meal? Read the menu and the offer details, see which part of the menu their choices are in, and work it out. It isn’t hard – honest
You won’t be able to eat out with your friends when you are a student if you can’t price a meal from a menu!!
Mrs T
For those hexagaxons in circles, even when the shape is broken into equilateral triangles (side=5) its not so easy to work out the areas.
You need Pythagoras to work out the height to do 0.5xbasexheight!
ok, so it came out at 0.5x5x4.33 which = 10.8 centimeters squared
so multiply that by 6
Hi Claire,
Are you asking us or telling us?? There doesn’t seem to be a question here!
What you have done is correct.
Mrs T
mr brewin – im stuck on question 3 page 42 you set for homework, i couldnt come to see you today because i was ill and its due for tomorrow, i’ve tried to work it out but i dont understand – could use some help, thaaanks
Hi Polly,
Imagine you are painting that shape. Every flat surface (10 of them!) has its own area. Work them all out and add them up to get a grand total.
Does that help? If not come back when you’ve made a start.
Good luck,
Mrs T
thankyou miss tibble that helps but i can only find 9 areas and my total is 120 or is it actually suppose to be 133? are they both wrong answers?
Hi Polly,
There’s the front and back,
left and right sides,
three flat tops
2 vertical bits each side of that middle bit on top
and the base.
I make it 220 square metres altogether.
Mrs T