Mathematics: Post your doubts here!

[Saad the Paki]

can someone help me out in this question: this is 2015 specimen paper!! Question8!! i have my exam in 2 hours!! kindly help!!

The two lines P and Q are perpendicular.
The equation of line P is y = 2x.
Line Q passes through the point (0, 10).
Work out the equation of line Q.

If two lines are perpendicular then the product of their gradient is equal to -1
So over here thd gradient of one line is 2 so to find gradient of other line we'll do " 2 × m = -1 "

 

[Saad the Paki]

Den u can go on to solve .....
m = -1/2
c= 10 ( cuz its passing thru (0,10) )
Therefore y=-1/2x + 10

 

[misscute406]

Thank you so much!! you helped me at the right time!! and make dua for me!! I am going for my exam now!!

 

[NOneed2speedd]

today gave v.22... was little bit hard compared to recent year papers
any one here did same variant?

 

[Saad the Paki]

I gave p21.. and IT WAS THE EASIEST PAPER IN HISTORY..!

 

[NOneed2speedd]

I gave p21.. and IT WAS THE EASIEST PAPER IN HISTORY..!

Lol lucky u... did u got any question with infinity i mean with number with dot above it and then u have to right it in fraction
like the Q.4 in 0580 specimen paper 2 2015

 

[NOneed2speedd]

And i got one more question which wAs

5,11,21,35,53
Find nth term. .. wasn't able to solve this one

 

[masterex567]

I left that question also!
Apparently it was 2n^2 + 3.

And i got one more question which wAs

5,11,21,35,53
Find nth term. .. wasn't able to solve this one

 

[NOneed2speedd]

I left that question also!
Apparently it was 2n^2 + 3.

And did u wrote that 0.25 as a fraction?
What ws ur answr

 

[misscute406]

maan it was damn tough!! the rectangular tank!! OMG!! just hate that question!! and the values of M and N!! urghhhhh

today gave v.22... was little bit hard compared to recent year papers
any one here did same variant?

 

[masterex567]

And did u wrote that 0.25 as a fraction?
What ws ur answr

no left that also. It was 23/90 however

 

[masterex567]

maan it was damn tough!! the rectangular tank!! OMG!! just hate that question!! and the values of M and N!! urghhhhh

the tank i got something like 78? and for m it was 2 and n it was -10. I'm sure of the answer but not of the method.
Will they penalise if i don't use the correct method even if the method is sensible?

 

[NOneed2speedd]

maan it was damn tough!! the rectangular tank!! OMG!! just hate that question!! and the values of M and N!! urghhhhh

Lol.... and m was 2 and n was -10
and for the tank one...Its answer was 684

 

[misscute406]

i wrote 5111/2000!! i didn't know what i was writing!! it was very hard!! :'(

 

[misscute406]

yess!! i got m=2 and n=-10!! yaaaaaaay!! i left the tank ques blank!! -_-

 

[NOneed2speedd]

no left that also. It was 23/90 however

Yeah.. my friend explained me in the last minute
i also got 23/90

 

[misscute406]

what other questions were der??

 

[Lana19984]

I did paper 22 it was quite except for that flow rate question

 

[masterex567]

I got 1430m as total distance. average speed as 11.9
and 684m for the cylindrical tank question

 

[NOneed2speedd]

and hw to do the second part of the m, n questionin which they asked the positive value of x using answer (a)
i didn't understood so applied quadratic formula in the end