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  1. M

    Mathematics: Post your doubts here!

    can someone help me with this: Helen has some black tiles, some white tiles and some grey tiles. She places a single row of 8 tiles above her washbasin. Each tile she places is equally likely to be black, white or grey. Find the probability that there are no tiles of the same colour next to each...
  2. M

    Mathematics: Post your doubts here!

    can anyone help m with part v and vi? the answer for v is : Elizabeth wins by 0.05s and 0.5 m the answer for vi is: Andrew wins
  3. M

    Mathematics: Post your doubts here!

    Thank you!!
  4. M

    Mathematics: Post your doubts here!

    Thank you!!!
  5. M

    Mathematics: Post your doubts here!

    two objects move along the same straight line. the velocities of the objects are given by v1=16t - 6t^2 and v2=2t-10. initially the objects are 32m apart. at what time do they collide? the answer is 2s... could anyone explain this to me?
  6. M

    Mathematics: Post your doubts here!

    Ahhh okay, thank you soo much
  7. M

    Mathematics: Post your doubts here!

    then distance is speed x time so 604.9 x 15 = 9073.5m
  8. M

    Mathematics: Post your doubts here!

    When the car is accelerating: s = (v²-u²)/2a = (15²-0)/2(5) = 22.5 m time taken for acceleration t = (v-u)/a = (15-0)/5 = 3 s When the car is speeding uniformly: s = velocity x time = 15 x 10 min x 60s = 9000m When the car is decelertating: s = (v²-u²)/2a = (0-15²)/2(-8) = 14.1 m time...
  9. M

    Mathematics: Post your doubts here!

    i already got it, the answer for the time was 605s and the distance 9075m
  10. M

    Mathematics: Post your doubts here!

    Can anybody help me with this question? A car is travelling along a straight road. It accelerates uniformly from rest to a speed of 15ms^-1 and maintains this speed for 10 minutes. It then decelerates uniformly to rest. If the acceleration and deceleration are 5ms^-2 and 8ms^-2 respectively...
  11. M

    Mathematics: Post your doubts here!

    Thank you so much!!!:):):):)
  12. M

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w13_qp_31.pdf Pls can someone help me with question 4, thank you:)
  13. M

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s08_qp_4.pdf can someone help me with Q5 b
  14. M

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s10_qp_31.pdf and also question 9
  15. M

    Mathematics: Post your doubts here!

    can someone help me with this.... question 3 pls http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s04_qp_3.pdf
  16. M

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w14_qp_31.pdf how do i solve 8 iii)
  17. M

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w14_qp_31.pdf how do i solve 8 iii)
  18. M

    Mathematics: Post your doubts here!

    Thank you so much:):):)
  19. M

    Mathematics: Post your doubts here!

    Can anyone help me with this http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s12_qp_33.pdf Question 2
  20. M

    Physics: Post your doubts here!

    http://onlineexamhelp.com/wp-content/uploads/2013/11/9702_w12_qp_13.pdf can someone pls help me with question 33, the answer is D
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