maths

Popular questions and responses by maths
  1. trigonometry

    A tree is broken over by the wind. It forms a right angled triangle with the ground. If the broken part makes an angle of 60° with the ground and the top of the tree is now 20m from its base, how tall WAS the tree?

    asked on March 26, 2016
  2. TRIGONOMETRY

    Express tan theta in terms of cosec theta

    asked on March 26, 2016
  3. plz plz help me belive me have tried

    cosx+cosy=a and sinx+siny=b show that sin2x+sin2y=2ab(1-(2/(a^2+b^2)) plz plz show step

    asked on November 2, 2016
  4. Maths

    The temperature at 6pm of town was 37 degree c at mid night the temperature was 31 degree c if the rise in temperature per hour

    asked on July 3, 2017
  5. Math

    Simplify:- 3√-108a^4 b^3

    asked on June 29, 2018
  6. MATHS

    A girl start at A and walks 2km south to B. she then walks 3km west to C. find the distance and bearing of C from A

    asked on May 14, 2018
  7. Maths

    The Ratio Of The 2nd Term To The 7th Term Of An A.P Is 1:3 And Their Sum Is 20.Calculate The Sum Of The 1st Terms Of The G.P

    asked on April 25, 2016
  8. maths

    i am a two digit number above 50. the sum of my digits is 12. and the difference of my digits is 4. who am i?

    asked on April 13, 2014
  9. sir damon plz help me or steve

    An ac source of 50v,100÷πHz is connected in series with an inductor of inductance L ad a resistor of resistance R.the current in the circuit is 2A ad p.d. across L and R are 30v ad 40v respectively 1) calculate the average power dissipated ? (2)

    asked on November 3, 2016
  10. Maths

    A man spends 3/8 of his money and still has rupees 720 with him. How much money did he have at first.

    asked on October 21, 2019
  11. math

    The length of a room is double its breath. Its height is 5m the area of four walls ( including the door and windows) is 210sq m. Find its volume solve this sum

    asked on November 21, 2017
  12. Venn Diagram

    In a class of 40 student,the number of student who study french is 10 more than the number of student who study history.if 8 student study both french and history,how many student study (1)history (2) french

    asked on October 10, 2016
  13. math

    prove that the value of cosx + secx can never be 3/2.

    asked on April 30, 2015
  14. maths

    f(x)=x ^2 +bx+c , b and c real .Find the minimum of (max|f(x)|)for x∈[−10,10]?

    asked on July 2, 2013
  15. Maths

    Please show me the way of using formula log?

    asked on October 14, 2011
  16. TRIG..............

    Q.1 Prove the following identities:- (i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 1-2sin^x cos^x/sinx cosx (ii) (1+cotx+tanx)(sinx-cosx)/sec^3x-cosec^3x = sin^2xcos^2x.

    asked on June 10, 2011
  17. Math

    1/2,3/2 and 6/2 find the value

    asked on June 11, 2019
  18. Maths

    John is FIVE years older than Peter.Twice the product of their ages FIVE years ago is 100 more than product of their present ages.Find the present ages of John and Peter.

    asked on May 20, 2019
  19. Maths

    SAMUEL IS 5 YEARS OLDER THAN HIS BROTHER .THE SUM OF THEIR AGES IS 33.WRITE A MATHEMATICAL EQUATION?

    asked on September 28, 2017
  20. math

    Two no which have same digit their sum is 9and difference is 27what will be the nos

    asked on February 7, 2017
  21. MATH

    HOW MANY QUATERS KG CAN BE MADE FROM 15 KG ?

    asked on January 25, 2017
  22. Maths

    Q. a^4 - 13a^2 + 36 Factorise

    asked on November 22, 2016
  23. Math

    The sides of a rectangle are in the ratio4:5.by what fraction should the shorter side be increaaed tomake it a square

    asked on November 17, 2016
  24. Maths

    1^2014 + 2^2014 + 3^2014 + 4^2014 + 5^2014 divided by 5, remains ______

    asked on November 13, 2016
  25. physics -damon help

    An ac source of 50v,100÷πHz is connected in series with an inductor of inductance L ad a resistor of resistance R.the current in the circuit is 2A ad p.d. across L and R are 30v ad 40v respectively 1) calc d average power dissipated 2) calc d power

    asked on November 3, 2016
  26. MATHS

    1) For how long must an investment be left at 5.5% p.a compounded yearly for the initial amount to double?

    asked on September 18, 2016
  27. value

    in a class 7 2 fifthy were girls ,27were boys ,how many girls were there

    asked on July 28, 2016
  28. maths

    a rectangular courtyard is 57 cm 50 cm long and 22 m . determine the least possible number of square stones of the same size required to pave it.

    asked on July 16, 2016
  29. math

    if the papers of 4 students are checked by any of the 7 teachers, then the probability that all the 4 papers are checked by exactly 2 teachers is?

    asked on April 30, 2016
  30. math

    an urn contains 2 white and 2 black balls. a ball is taken at random. if the ball is white then it is not replaced otherwise it is replaced along with another ball of the same colour. find the probability that the third ball drawn is black.

    asked on April 29, 2016
  31. Math

    Paulo and sergio buy a pizza.paulo eats 1/3 of the pizza and sergio eats two fifths.how much of the pizza is left over?

    asked on February 17, 2016
  32. Maths

    Solve For X And Y 2x-4y=-3

    asked on January 11, 2016
  33. maths

    if A and B are in ratio 3:4 and B and C in 12:13,then A and C will be

    asked on September 27, 2015
  34. maths

    . 30 girls and boys have planned for a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?

    asked on September 27, 2015
  35. speed time distance

    a train running at the speed of 180 km hr crosses a 365 meter long platform in 21sec. what is the length of the train

    asked on June 8, 2015
  36. Lara

    Alice has 4 times as much money as Benny. If Benny has $36 less than Alice, how much money do they have altogether? A $45 B $48 C $60 D $180

    asked on January 18, 2014
  37. Maths

    Is given a function: f(x)=x2 + px + q Prove that: f(x+1) + f(x-1)= 2+2 f(x)

    asked on August 20, 2013
  38. maths

    A factory produces two products A and B using raw materials p and q. It uses 3 units of p and 1 unit of q to produce one unit of A. It uses 1 unit of p and 2 units of q to produce one unit of B. The maximum daily supplies are 330 units of p and 220 units

    asked on July 9, 2013
  39. maths

    A subset S of {1,2,…,n} is said to be packed if whenever i,j∈S the number ⌊(i+j)/2⌋ is also in S. Determine how many subsets of {1,2,…,25} are packed. Details and assumptions i and j need not be distinct. If i=j is in the set, then clearly so is

    asked on July 9, 2013
  40. physics

    The efficiency of a machine is in general defined as the ratio between useful (released) energy and the input energy. Therefore, the exact formulas for efficiency depend on the purpose of the machine. What's the difference in the maximal efficiency of a

    asked on July 9, 2013
  41. maths

    Suppose p(x)=ax^2+bx+c is a quadratic polynomial with real coefficients and |p(x)|≤1 for 0≤x≤1. Find the largest possible value of |a|+|b|+|c|.

    asked on July 9, 2013
  42. maths

    Find the smallest n such that for any prime p, at least 20 numbers 1,2, ..., n are quadratic residues not modulo p. k is quadratic residue modulo p if there exists an integer j such that j^2 ≡ k (mod p).

    asked on July 2, 2013
  43. maths

    There are N ordered integer quadruples (a,b,c,d) subject to 0≤a,b,c,d≤99990 such that ad−bc≡1(mod99991). What are the last three digits of N?

    asked on April 6, 2013
  44. statistics

    A computer course is conducted for 24 days.Each day 48 persons attended the course.To prepare a day wise work done sheet for all 24 days,find the estimated and the actual number of persons attended the course.Is the estimated value more or less than the

    asked on October 25, 2011
  45. question (doubt)....

    solve to find x and y:- x^3+8y^3+x+2y=0

    asked on June 11, 2011
  46. trigonometry...........

    Prove the following identity:- (i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 1-2sin^x cos^x/sinx cosx

    asked on June 11, 2011
  47. MATHS......

    solve the following. 1) x^3+3y^3+x+2y

    asked on June 10, 2011
  48. MA

    a) find the equation of AB, the perpindicular bisector of the line joining the points P(-3,1) and Q(1,9) (line AB intersects the point at midway of PQ) b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis,

    asked on January 18, 2010
  49. maths

    a) find the equation of AB, the perpindicular bisector of the line joining the points P(-3,1) and Q(1,9) (line AB intersects the point at midway of PQ) b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis,

    asked on January 17, 2010
  50. general maths

    A study of motor vehicle rates in the 50 states reveals that traffic death rates (deaths per 100 million motor vehicle miles driven) can be modeled by the normal curve. The data suggest that the distribution has a mean of 5.3 and a standard deviation of

    asked on September 7, 2009
  51. Maths

    a tray holds 2.3 liters of water when full (2300 cm3) Calculate the height (h cm) of the tray Tray = L=15cm B=20cm H=?

    asked on June 14, 2009
  52. math

    given that a/b=c/d, decide whether it is true or not that a/c=b/d. and how can i explain my reasoning?

    asked on May 26, 2009
  53. math

    are all regular hexagons similar? how can i explain?

    asked on May 26, 2009
  54. TP

    What is Standard Deviation? As in what does it measure, is it a measure of spread of a graph of results?

    asked on May 29, 2008
  55. K

    (a) Find the indefinite integrals of the following functions. (i) f (t) = 6 cos(3t) + 5e^−10t (ii) g(x) = 21-12x^3/ x (x > 0) (iii) h(u) = cos^2( 1/8 u) (b) Evaluate: (this big F sign at the start, 5 at the top and 1 at the bottom) 5 1/4x (7 + 6x^2) dx

    asked on March 24, 2008
  1. Maths

    Sjkgksgz(gzhkznzcCKnsjwokamx. Xbnaoakdmmfdldllxkxmxbfkelwlz

    posted on November 28, 2019
  2. French

    is musculine or feminine

    posted on August 4, 2017
  3. math

    The product of two numbers is 504347 .If one of the number is 317.Find hte other number

    posted on June 27, 2017
  4. plz plz help me belive me have tried

    how did sin(x+y)=2sinxsiny is it not suppose to be sin(2x)

    posted on November 2, 2016
  5. math

    maths

    posted on May 16, 2016
  6. math

    16x+8x+4x^2-16x+20+10+5x-20therefore 4x^2+8x+5x+10 4x^2+13x+10

    posted on August 24, 2014
  7. math

    a sack contain 10 blue and 6 red crayons another sack contains 9 blue and 12 red crayons two crayons are drown at random without replacement from each sack. what is the probability that all the four crayons are blue? exactly one of the four crayons is red

    posted on July 7, 2014
  8. Maths

    You shouldn't be asking for help in the maths challenge. It is against the rules.

    posted on June 15, 2014
  9. unscrambling word

    mbicned

    posted on September 6, 2011
  10. math

    thank you

    posted on May 26, 2009
  11. math

    thank you

    posted on May 26, 2009
  12. goemetry

    thnx

    posted on May 26, 2009