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1. (Original post by student004)
do past papers forget about everything else
Past papers are not as useful as they were last year but are still good for practicing questions. 9-1 Practice papers are more useful than past papers.
2. Hey I have this rather confusing question which needs a bit of clarification.

So I worked the equation of L to be which crosses the y axsis at However, point O hasn't be defined, so assuming it means the center would the area of the triangle be ?
3. (Original post by CraigBackner)
Hey I have this rather confusing question which needs a bit of clarification.

So I worked the equation of L to be which crossed the x axsis at However, point O hasn't be defined, so assuming it means the center would the area of the triangle be ?
Yes O is (0, 0) and that would be made clearer in a real exam question.

It crosses the y-axis at (0, 20/3), not the x-axis.
4. (Original post by notnek)
Yes O is (0, 0) and that would be made clearer in a real exam question.

It crosses the y-axis at (0, 20/3), not the x-axis.
So knowing this, the length of the triangle are , (given by the radius), (given by the difference of the two points ,, and (by Pythagoras theorem).
Therefore the area is which should give . However the mark scheme answer is Is this correct and if so how?

5. (Original post by CraigBackner)
So knowing this, the length of the triangle are , (given by the radius), (given by the difference of the two points ,, and (by Pythagoras theorem).
Therefore the area is which should give . However the mark scheme answer is Is this correct and if so how?

It is referencing the x-intercept of the tangent, not the circle, if you have got those confused. (the tangent intercepts the x-axis at )
6. (Original post by CraigBackner)
Yes,yes I know that but you need to work out the area of , which includes a point on the circle
Try sketching it out if you're still unsure.
7. (Original post by _gcx)
It is referencing the x-intercept of the tangent, not the circle, if you have got those confused. (the tangent intercepts the x-axis at )
Ohh i see now,thanks
8. (Original post by Misaki24)
My teacher said the grade boundary has already been set for this year and any changes would only apply to the year 10s im confused now :P
But how can the grade boundaries already be set if the whole point of grade boundaries is to see how the whole nation did as a whole and then setting the ranges of the marks to achieve certain grades.
9. do this one:
nice and easy

make "q" the subject of the formula 5(q+p)=4+8p

(Original post by NothingButWaleed)
But how can the grade boundaries already be set if the whole point of grade boundaries is to see how the whole nation did as a whole and then setting the ranges of the marks to achieve certain grades.
10. (Original post by unillama)
do this one:
nice and easy

make "q" the subject of the formula 5(q+p)=4+8p
No Problem....

Expand: 5q+5p = 4+8p
Rearrange: 5q = 4+8p-5p

Final Touches: q = (4+8p-5p)/5
11. (Original post by NothingButWaleed)
No Problem....

Expand: 5q+5p = 4+8p
Rearrange: 5q = 4+8p-5p

Final Touches: q = (4+8p-5p)/5
YOU WOULD ONLY GET 2 MARKS FOR THAT
12. (Original post by unillama)
YOU WOULD ONLY GET 2 MARKS FOR THAT
Oh shame "Simplest form"
q = (4+3p)/5

Lol, see this is the kind of stupid mistakes I make in the exam....
13. its ok this is the only place you should make the mistakes not in the exam!!
you learn from mistakes so make them but dont repeat them!!
xx
(Original post by NothingButWaleed)
Oh shame "Simplest form"
q = (4+3p)/5

Lol, see this is the kind of stupid mistakes I make in the exam....
14. (Original post by unillama)
its ok this is the only place you should make the mistakes not in the exam!!
you learn from mistakes so make them but dont repeat them!!
xx
True....watch me still make the same mistake in the exam *facepalm*. Lol..retard alert!
15. lol!!
(Original post by NothingButWaleed)
True....watch me still make the same mistake in the exam *facepalm*. Lol..retard alert!
16. Hey can someone explain the understanding to this question?

A gardener wants to estimate the number of snails in his garden.
One day he catches 95 snails. He puts a tag on each snails then releases them.
Then next day the gardener catches 164 snails.
68 of these snails have a tag on them.
Work out an estimate for the total number of snails in his garden.
Write down any assumptions you have made.

Then answer is because 95 of the snails make of the population. But whys that?
17. (Original post by CraigBackner)
Hey can someone explain the understanding to this question?

A gardener wants to estimate the number of snails in his garden.
One day he catches 95 snails. He puts a tag on each snails then releases them.
Then next day the gardener catches 164 snails.
68 of these snails have a tag on them.
Work out an estimate for the total number of snails in his garden.
Write down any assumptions you have made.

Then answer is because 95 of the snails make of the population. But whys that?
We assume that the sample that has been taken is representative of the population. Thus, as of the snails collected have been tagged, we can assume that we have tagged of the population (again, making the assumption that it is representative), and hence , from which you can find the population.
18. (Original post by CraigBackner)
Hey can someone explain the understanding to this question?

A gardener wants to estimate the number of snails in his garden.
One day he catches 95 snails. He puts a tag on each snails then releases them.
Then next day the gardener catches 164 snails.
68 of these snails have a tag on them.
Work out an estimate for the total number of snails in his garden.
Write down any assumptions you have made.

Then answer is because 95 of the snails make of the population. But whys that?
I've seen questions similar to this in lots of the 9-1 practice papers. I'm not sure what the obsession is
19. Hey I'm really stuck on this question because the answer I'm getting is not the same as the markscheme.

I worked out the two equal lengths of the isosceles triangle to be because of Pythagorean triples,
The using I rearranged for to give then subbing in for a and solving I get however the markscheme answer is
Anyone know why?
20. (Original post by CraigBackner)
Hey I'm really stuck on this question because the answer I'm getting is not the same as the markscheme.

I worked out the two equal lengths of the isosceles triangle to be because of Pythagorean triples,
Where did you get 5 from?

The first step is to use the fact that the area is 42 to find the length of the base. Have you done this?

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