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Mrs Tibble’s / Mr Atkins’ Year 9801 comments to Mrs Tibble’s / Mr Atkins’ Year 9 |
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im really stuck on question 2
Hi Yasmine,
Is this the curved graph questions?
If so, draw out the table of values they give you.
Then, for each of the x values work out x-squared (remember a minus times a minus is a plus so all the se values will be positive)
To find the y values, do what the equation tells you:
add x-squared and x and 1
Does that help?
JT
Hi Mrs Tibble. Do you know any websites where i can get past SATs papers ?
Thankyou
Rachel
P.S Hope your having a nice holiday
Hi Rachel,
http://www.emaths.co.uk/KS3SAT.htm
Have fun
JT
mrs tibble for question 2C is the perimeter for the reCtangle 1088 beCause it seems really big!
mrs tibble, question 2 doesn’t make sense
because it doesn’t have what it equals to. you know in the examples that we did in class it had the equation, then = 30 or something like that, well this one doesn’t so i am very very confused :S hellpppp please!
or can you put them into two different equations? one for the triangle and one for the rectangle?
HELP ME! QUESTION TWO! i do not understand this!
okay never mind, i’ve done it now
Hi Tia and Alice,
It doesn’t give you the value but it tells you that they equal each other.
Work out the expression for the perimeter of the triangle.
Do the same for the rectangle.
Put one equal to the other and solve so you find out what n is.
Then work out the value of all the sides using your value for n, and then you can get the perimeter values.
Mrs T
Emily,
Read the message above.
JT
my mum just worked it out
but she flipped it so that both 7n and 6n were on one side and 16 and 4 were on the other, is this righht? i am a little confusedd!
Hi Alice,
However she has done 2 steps at once which is probably what is confusing you.
Yes, your Mum is right and she is showing all her working too
7n – 16 (for the triangle) = 6n – 4 (for the rectangle)
Subtract 6n from both sides:
7n – 6n -16 = -4
Add 16 to both sides:
7n – 6n = -4 + 16
Simplify:
n = 12
Check it to see if 12 works.
Not for nothing, she got a C at o-level she said hehe
ohh i get it now, i’m going to start again tomorrow! thank you 
There you are Alice!! You will need GCSE maths so you can help your own children with their homework! Lol See you in school.
Hello Mrs Tibble I don’t understand question 4 page 24
Hi Jasmine,
It’s angle notation used when a single letter wouldn’t be very helpful because there are several angles around that letter.
Angle EFG is the angle formed when you go from E to F to G ie in the diagram it’s the blue angle at F.
The angle corner is always the middle letter.
If you look at how it works with the values given in the first line, you should understand it.
Have fun!
Mrs T
I don’t get it…
sorry!!
Hi Jasmine,
You don’t have to apologise!!!
Look at line 2:
Angle AEF = 42 degrees
Now go to the diagram. Move your finger from A to E to F. Can you see that the lines you have drawn with your finger have formed the angle that they have written the 42 in?
Similarly, if you move your finger from E to G to D you draw the 117 deg angle.
So angle EFG will be the blue angle at the top of the triangle
Angle EGF will be angle G inside the triangle etc
For any angle, its letter is always in the middle of the three letters.
OK now?
JT
Thankyou Mrs Tibble!!!
Hello Mrs Tibble , i don’t understand how to lay out questions 3 and 5 because there’s only one bag…
Rachel
Hi Rachel,
That doesn’t matter. You can call the first section of the tree ‘first go’ and the next section ‘second go’. Also, because the first ball chosen is looked at then put back, the probabilities won’t change: they’ll be the same in each section of the tree.
Hope that makes enough sense to help you!
Mrs T
Yes it does. Thank you very much
mrs tibble, for q3 on the second bit of the tree would the probabilities be over 9?
oh and also my piano teacher said that a piano is a percussion instrument
Hi Alice,
No – still over 10 because the first coin is put back (RTQ!)
OK we’ll need to change the tree diagrams then. You can work out what needs to be done and explain it to the class next lesson
Mrs T – about to have a kitten named after her!!!!!!!!!
PS Alice. Here’s a quiz for you
http://www.sporcle.com/games/orchestra.php
Hello Mrs Tibble, sorry to disturb your evening, but I need some help for Q3. I know that for the second part of the tree, it is over 10, but I am not sure what the numerator is, and how to find it.
Thank you Charlotte.
Hi Charlotte,
The numerators are the same in the second part as they were in the first part because it’s the same bag of coins.
Mrs T
So does that mean that it is 5 over 10 for all of them?
That’s right.
Yay, thank you!
ahh i see
but because it’s been taken out the put back, then another one taken out OH i get it. so the one that’s taken out after is the numerator?? thank you 
yess
that quiz is really hard!
Hi Alice,
Not sure what you mean by the numerator bit. The coins are 10p and 2p – five of each so you have 5 chances out of 10 of getting each type of coin.
How did you do in the quiz?
JT
no like you know when you times the two numbers together?
err 23/30
Not bad! The percussion section is really hard isn’t it?!
Still not sure what you’re asking me about in the HW though!
P(two 10p coins) = 5/10 x 5/10
yess
i don’t know what i mean either
Lol!! That’s alright then – we’re as bad as each other
mrs tibble, i’m really confused as to why we need spotty paper for q5? isn’t it just drawing a table? sorry i might be being really dumb
Hi Alice,
The word ‘dumb’ means someone who can’t speak – that’s not you!!
I gave you the spotty paper to plot the shape and transformations. Didn’t RTQ carefully enough lol!
Feel free to draw it if it helps.
Mrs T
SOS!! i dont get how you work it out?!
but it says to do it without drawing diagrams?
i’m so confuseeeedd :S
Hiya, the book might say don’t use diagrams but I think drawing it will help you understand what’s happening in the transformations so DRAW IT!
okay so we do the actual question in our books and then stick the sheet in?
Hi Alice, I thought using the spotty paper for your axes would help because the squares are bigger so there wouldn’t be scale problems. Hope you’ll be ok now.
oh i get it now
yeah it will thanks 
I still dont get it :’(
argh i can’t do it! they’re all going off the page! eep i really don’t get it :S
Hi Emily and Alice,
Draw your axes so the origin is in the middle of the page – so there will be plenty of room!!!
Draw the kite – the coordinates of its vertices (corners) are in the first column.
Reflect it in the y axis to answer the first part.
Reflect your new shape in the x axis – answer the 2nd part.
Translate your last shape according to the instructions.
BINGO you’re there
but there are only two coordinates and four corners??
Errrrr…………one pair of coordinates for each of the 4 corners!