You are Here: Home >< Maths

# Any smart asses out there?

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. If your one of them, please could you work out question 3 in this paper. I struggled with it a bit, but i got the answer 125/4, is this correct?

Any help will be appreciated
Attached Images
2. Grade 9 Paper1.pdf (831.4 KB, 35 views)
3. (Original post by theBranicAc)
If your one of them, please could you work out question 3 in this player. I struggled with it a bit, but i got the answer 125/4, is this correct?

Any help will be appreciated
It's not very difficult. At A, -2x+5 = 0 -> 2x = 5 -> x = 5/2.
At D, x =0 -> y = 5.
As ABCD is a square, AP is perpendicular to AD, so its gradient is 1/2.
Thus the equation of the line PA is y - 0 = 1/2(x - 5/2) using y-b=m(x-a), which becomes y = 1/2x - 5/4.
Hence at P, x = 0 -> y = -5/4.
Thus P = (0, -5/4) and D = (0, 5), so PD = 5 - (-5/4) = 5 + 5/4 = 25/4.
4. I got 6 and 1/4
5. (Original post by Ucalyptas)
I got 6 and 1/4
Yes, 25/4 = 24/4 + 1/4 = 6 and 1/4, so your answer is correct.
6. (Original post by HapaxOromenon3)
It's not very difficult. At A, -2x+5 = 0 -> 2x = 5 -> x = 5/2.
At D, x =0 -> y = 5.
As ABCD is a square, AP is perpendicular to AD, so its gradient is 1/2.
Thus the equation of the line PA is y - 0 = 1/2(x - 5/2) using y-b=m(x-a), which becomes y = 1/2x - 5/4.
Hence at P, x = 0 -> y = -5/4.
Thus P = (0, -5/4) and D = (0, 5), so PD = 5 - (-5/4) = 5 + 5/4 = 25/4.
I was so close, the stupid mistake i made was putting 5/2 instead of 5/4 for the y intercept of p
but anyways thanks!

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
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
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 19, 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.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams