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Pass maths answers I ppr II

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  • 14-06-2004 7:56pm
    #1
    Smellyirishman
    Closed Accounts Posts: 3,285 ✭✭✭


    Just some that I took down, some right , some wrong but I think I got a decent amount right :rolleyes:

    Q1.(a) 24cm^2 (b)messed it up! so easy but i messed it up! (c)(i)2.1m(ii)0.81pi(iii) wrong! got wrong formula! :(

    Q2(a)(8,1) (b)(i)5 (ii)10.5 (iii) slope is same and solve (iv) put it in =0 (v) slopes are equal etc...

    Q3(a)(i)6 (ii)X^2+Y^2=144 (b)(i) show its diameter, twice length of radius (ii) right angle triangle to pythagorous (sp?) (c)(x+2)^2+(y-1)^2=10 (ii) + or - 1

    Q6(a) (i) 40,320 (ii) 5,040 (b) (i) 2,925 (ii) 117 (iii) 52 (iv) 25 (c) (i) 1/24 (ii) 1/6 (could be wrong) (iv) put down somethin but it was wrong

    Q7(a) root 10! (b)(i)40 (ii)graph (iii) 25 (iv)220 (v)60

    Q11 (a) same 2 in question but with inequality signs and x greater or equal to 0 (b) 720X+360Y less then or equal to 108000 , 6X+8Y < or = to 1200 ( then draw graph) (ii) (120,60) (150,0)

    somethin like that I think but like I said I did some wrong I think


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    #2
    Corona
    Closed Accounts Posts: 35 ✭Corona


    Yeah I got nearly all of those answers, except in the probability question but I did Trig as a 7th question so can afford to mess up one question. Overall thought the two papers were easy enough. Would be very disappointed if I didn't get an A.


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    #3
    DEmeant0r
    Registered Users Posts: 3,165 ✭✭✭DEmeant0r


    Originally posted by Smellyirishman
    Q3(a)(i)6 (ii)X^2+Y^2=144 (b)(i) show its diameter, twice length of radius (ii) right angle triangle to pythagorous (sp?)
    I solved part (ii) differently I took ahalf of the triangle and tried to see if they had the same area, and it worked. Wonder if they'll accept it.


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    #4
    conZ
    Registered Users Posts: 1,714 ✭✭✭conZ


    Paper 2 was reliatively easy alright, though I wasted so much time. I was taking my time, not too bothered about timing at the start, as Maths is gonna be my 'fall' subject. I just wanted a decent pass.

    I'd say I hit a b3 or c1 in Paper 1, which was dissappointing, but I did well in the Irish, so I said Maths would be my fall subject.

    Was finished question 3 when I realised that there was only about an hour left.
    I was never any great at P2, didn't like and didn't practice it much. I'd say the last time I done more than 2 questions in one sitting was in the Mocks.

    Q1:
    Well handy, though some poeple got mixed up and confussled on the C part. Finished this question in about 20 mins.
    Answers :
    A. 24m squared
    B. 1682.8m sq.
    C. (1) 2.1m (2) .8095pi m sq. (3) .4868pi m sq.

    Q2:
    Couldn't remember the exact midpoint formula, so I split to the jacks for about 10 minutes to try clear the head. Eventually got it right, through a process of elimination. Should nearly have studied the formulae last night :). Started this question at 10.00, and with the process' of eliminations and the jacks, got it finished at 10.55.
    Answers :
    A. Midpoint (8,1)
    B. (1) 5 (2) 6 (3) 3x-4y+16=0 (4) Showed it (5) abcd is a parallelogram.

    Q3:
    Quite handy alright. Realised that I'd only a half hour left when I got to part C, so when that wasn't working out, I just left it and went for Q7 and Q11. Started this question at 10.55 and finished at 11.30.
    Answers :
    A. (1) Radious = 6 (2) x2 + y2 = 144
    B. (1) Distance formula, showed that length ao = bo. (2) Got the slope of AC as 5, verifyed that the slope of the perpendicular was -1 over 5.
    C. (1) Attempted it, cant remember what method I used, but it didnt come out right. Just left it and went onto Q7.

    Q7:
    Was in a rush to get this and Q11 done. This didn't turn out well though. Couldn't be arsed getting the mid-interval values in B, ****ed up the standard deviation too. Wasn't too bothered though.

    Q11: Linear Programming
    Handy enough imo, though the second and third section of part B was a bit confusing.
    Answers :
    A. Inequalities = 1. x - 2y > 0 ; 2. 2x + y < 4 ; 3. Y > 0
    B. (1) Inequalities = 1. 720X + 360Y < or equal to 108,000 ; 2. 6X + 8Y < or equal to 1200. Illustrated both on graph paper with the points : (150,300) and (200,150).
    (2) Max Income = (150,300) = €4650 income
    (3) Max profit = (150,300) = €1350 profit.

    Finished this question at about 12.03. Probably got it done in about 20 minutes.



    Overall, hopefully I got Q1 and Q2 fully correct. Q3 A and B correct, and hopefully, but not likely Q11 correct. Maybe ye could verify my answers though.
    Hopefully about 170 marks out of 300 and I'd be delighted.

    I just hope now that I dont fail French, Biology or Tech. (touch wood)


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