Posts by Stranger

Total # Posts: 87

  1. Science

    Correct.
  2. connections Academy sucks

    same I turned in a portfolio and did everything they told me too do and turned it in and then I couldent do my lesson for the next day cause they said I did not do it, I turned in my work and they said "oh it was not good enough do it again" and I had to and it took ...
  3. Math

    1 because she only has 1 pair of jeans
  4. Social Studies

    ^ BETTTTTTTTTTT
  5. geometry

    -7
  6. Science

    What is the likability of a earthquake and volcanic eruption happening in Minnesota
  7. math

    Why do you just use the denominators?
  8. math

    Nothing is helpful I got 1 13/20
  9. SS

    Is it C or D?
  10. SCIENCE,PHYSICS

    3 is the answer Ohh brilliant cheateres rockzzz Calvin shokzzz Plz tell other answers to public
  11. geometry

    ABC is a triangle with AC=139 and BC=178. Points D and E are the midpoints of BC and ACrespectively. Given that AD and BE are perpendicular to each other, what is the length of AB?
  12. statics

    A bag contains 4 balls, each of which have a positive integer written on it. Let X be the random variable of the value written on a single ball drawn from the bucket. If E[X]=8, what is the maximum possible value of E[X^2]?
  13. geometry (help steve)

    A circle of radius 1 is drawn in the plane. Four non-overlapping circles each of radius 1, are drawn (externally) tangential to the original circle. An angle γis chosen uniformly at random in the interval [0,2π). The probability that a half ray drawn from ...
  14. physics

    An airplane of a certain density and shape flies at a constant speed. To do so, it must fly with a certain velocity v0. If the size of the airplane is scaled up in length, width, and height by a factor of two, it can only fly above a new velocity v1. What is v1/...
  15. physics

    Consider a horizontal road with such a set of traffic lights, each spaced 100 m apart. A car sits at the first traffic light. At t=0 the light turns green and the car accelerates. What is the maximum time t in secondsthe next light must turn ...
  16. physics

    P1/t1=p2/t2
  17. physics

    Many of you may have noticed the phenomenon that basketballs get flat if the weather is cold. If a basketball was inflated to a gauge pressure of 60,000 Pa when the temperature outside was 20∘C, what is the gauge pressure inside the basketball&...
  18. math

    wrong 326
  19. Geometry

    Find the number of 6 -term strictly increasing geometric progressions, such that all terms are positive integers less than 1000.
  20. physics

    Two point charges +q=1 μC and −q=−1 μC with mass m=1 g are fixed at the positions ±r⃗ 0 with |r0|=1 m. The charges are released from rest at t=0. Find the time &#...
  21. physics

    Three identical conducting spheres are located at the vertices of an equilateral triangle ABC. Initially the charge the charge of the sphere at point A is qA=0and the spheres at B and C carry the same charge qB=qC=q. It is known that the sphere B exerts an ...
  22. math

    He is correct only 1 integer satisfy he mean
  23. physics

    Lol brilliant cheaters wtf
  24. Geometry

    There are 100 runners, each given a distinct bib labeled 1 to 100. What is the most number of runners that we could arrange in a circle, such that the product of the numbers on the bibs of any 2 neighboring runners, is less than 1000?
  25. Maths

    yes it is 3
  26. Geometry

    What is a and what is b?
  27. Geometry

    If two six-sided dice are rolled, the probability that they both show the same number can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?
  28. Geometry(first one is typo)

    Let ƒÆ=sin −1 7/25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
  29. Geometry

    Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
  30. math

    ABC is a triangle with circumcenter O, obtuse angle BAC and AB<AC. M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC. If 2AD=(AB+AC), ...
  31. Geometry

    Convex quadrilateral ABCD has sides AB=BC=21, CD=15 and AD=9. Given additionally that ∠ABC=60∘, what is the length of BD?
  32. Probability

    A school is running a raffle for two prizes. 59 tickets were sold for the raffle, numbered 1,…,59. All the tickets are put into a hat and a teacher picks out two tickets which have numbers i and j from the hat. What is the expected value of |i−j|?
  33. maths

    I got it till now maximize a+b, if Re (b)=-Im(a), Re (a)-21 <Im (b)<Re (a)-5 So find max a+b
  34. maths

    A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is a person who will ...
  35. Physics

    The fundamental frequency of the G string of a guitar is f=196Hz. The fundamental vibrational mode of the string is described by the standing wavey(t,x)=acos(2πft)sin(πxL)where L=65cm is the length of the string and a=1mm is the amplitude of ...
  36. maths

    A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is a person who will ...
  37. maths

    Find the number of different ordered quadruples (a,b,c,d) of complex numbers such that a^2=1 b^3=1 c^4=1 d^6=1 a+b+c+d=0
  38. maths

    thanks
  39. maths

    Find the largest possible value of x^3+y^3+z^3 for realx, y, z, such that xyz^2=−64y−128x x^2yz=−32y−32z 3xy^2z=128x−64z
  40. maths

    ABC is an acute triangle with ∠BCA=35∘. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of ∠ABC(in degrees)?
  41. Algebra

    Strange r meets stranger
  42. Algebra

    As x ranges over all real values, what is the minimum value of f(x)=|x-123|+|x-456| + |x-789|
  43. Physics/math

    Can't get it, Didn't studied this topic, Would you please work the solution.
  44. Maths Probability

    When writing a math expression, any time there is an open bracket "(", it is eventually followed by a closed bracket ")". When we have a complicated expression, there may be several brackets nested amongst each other, such as in the expression (x+1)∗...
  45. GEOMetry(TRIANGLE)

    how
  46. Trigonometry

    Every point (x,y) on the curve y=log(3x)/log2 is transferred to a new point by the following translation (x′,y′)=(x−m,y−n), where m and n are integers. The set of (x′,y′) form the curve y=log(12x−96)/log2. What is the value of m+n? ...
  47. calculas

    At time t=0 s, the radius of a circle is equal to 15 cm. The radius of the circle increases at a rate of 0.5 cm/s. The rate of change of area at t=20 s is equal to mπ cm^2/s, where m is a positive integer. ...
  48. algebra

    Let no. of men be x No. of women = 5x + 2 Total students = No. of men + women 50=x + 5x+2 48=6x x=8 No. of women = 5x + 2 = 5 * 8 + 2 =42 (ans)
  49. Physics help ASAP please

    No direction no length of river how broad river is then how to find?
  50. Math

    700 $ make 42281 $ in ten years Totally wrong this cant be true He had invested money that will be get in a collection not in payment
  51. Math

    This Compound interest using Amount = principle * ((Rate + 100)/100)^time Here Rate is per time period i.e 8% per annum will be 2% per quater Time period is 10 years = 40 quater year P=700 $ Putting values Amount = 700 * ((2+100)/100)^40 =700 * (51/50)^40 using scientific ...
  52. math

    30 + 20/((1*5)*2) since 1*5 = 5 and 5*2 = 10 this become 30 + 20/10 30+2 32
  53. math

    how
  54. math

    25 independent, fair coins are tossed in a row. What is the expected number of consecutive HH pairs? Details and assumptions If 6 coin tosses in a row give HHTHHH, the number of consecutive HH pairs is 3.
  55. Arithmetic

    B-1/2 Let no. of books be x No. of history books equal x into 1/3 I.e.x/3 No. Of English books equal x into 1/3 I.e. x/6 Rest books = no. Of science books =total books -(history books+English books) =×-(×/3 +×/6) =x-(3x/6) =x-x/2 =x/2 books are of science of ...
  56. Maths

    ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b, where a and b ...
  57. Trigonometry

    Suppose N = xyzyx, where x is nonzero but y and z could be any digit. Then there are 9(10^2) = 900 possible palindromes to consider. Recall that a number is divisible by 4 iff its last two digits are divisible by 4. Thus, if N is divisible by 4, then "yx" must be of ...
  58. Mathematics

    Try to use remainder therom reverse it from divident subtract remainder then divide with no remainder ans will come
  59. Combinations Maths

    okk
  60. Combinations Maths

    25 independent, fair coins are tossed in a row. What is the expected number of consecutive HH pairs? If 6 coin tosses in a row give HHTHHH, the number of consecutive HH pairs is 3.
  61. Combinations Maths

    For how many positive integers n are there exactly ⌊n/2⌋ or ⌈n/2⌉ primes less than or equal to n?
  62. Geometry

    BC is a triangle with ∠BAC=60∘,AB=5 and AC=25. D is a point on the internal angle bisector of ∠BAC such that BD=DC. What is AD^2? It is not stated that D lies on BC. This assumption is not necessarily true.
  63. Geometry

    ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b, where a and b ...
  64. Number theroy

    What is the 50th smallest positive integer that can be written as the sum of distinct non-negative integer powers of 3?
  65. Algebra

    Let S(N) denote the digit sum of the integer N. Let M denote the maximum value of N/S(N), where N is a 3-digit number. How many 3-digit numbers N satisfy N/S(N)=M? The digit sum of an integer is the sum of all its digits. For example, the digit sum of N=1123 is 1+1+2+3=7.
  66. Algebra

    We define n♡ recursively as follows. 1♡=1; n♡=((n−1)♡)⋅n+1 Find the largest n<1000 such that the last two digits of n♡ are zeroes. Just to make it clear: unlike "n-factorial," "n-heart" is NOT an official ...
  67. Algebra

    How many positive integers n≤1000 cannot be written in the form a2−b2−c2 where a,b and c are non-negative integers subject to a≥b+c?
  68. Slope Maths

    What is the slope of the line tangent to the quadratic f(x)=4x^2−3x+6 at x=7?
  69. Limit Math

    Evaluate lim x→∞ 2x/(√(x^2+3)-4) in words 2x divide by(root(xsq +3) -4)
  70. Trignometry

    ABCD is a square where M and N are midpoints of AD and CD, respectively. If sin∠MBN=a/b, where a and b are coprime positive integers, what is the value of a+b?
  71. Trignometry

    Let m and M be the minimum and maximum values of the domain of f(x)=sin^−1(x2−35), respectively. What is the value of M−m? sin^-1 is sin inverse
  72. Trignometry

    The angles in triangle ABC satisfy 6sin∠A=3√(3)sin∠B=2√(2)sin∠C. If sin^2∠A=a/b, where a and b are coprime positive integers, what is the value of a+b?
  73. Algebra

    The function f(x)=x^4−10x^3+40x^2−80x+64 has four complex roots, one of which is 2−2i. What is the sum of all real and imaginary coefficients of these roots? i here is imaginary unit i.e. i^2 = -1
  74. Algebra

    A is a 2 by 2 matrix. Given that A=(5 1) (1 5) , what is the value of det(A)? det(A) is determinant of A
  75. Physics

    A 80 kg climber is standing horizontally on a perfectly vertical cliff face. The climber is 1.8 m tall and is attached by a 2 m long rope fastened around their middle to a point on the cliff above them. What is the normal force the cliff face exerts on the climber in Newtons? ...
  76. Physics

    i could not get there hw to put angle
  77. easy algebra!

    10
  78. physics

    0.0928 kg
  79. social studies

    wow thanks a lot I go to connections two and it is ok ig
  80. geometry

    150
  81. algebra

    Let x = side of square to cut off from each corner 20 - 2x = width of bottom rectangle 28 - 2x = length of bottom rectangle V = x(20 - 2x)(28 - 2x) = 4x(10 - x)(14 -x) = V = 4x(140 - 24x + x²) V = 4(140x - 24x² + x³) Differentiating and equating to zero dV/dx = ...
  82. Calculus

    Oops, sorry about that, the correct answer is 7 (4 * 6) + (5 * -2) + (-1 * 7) 24 + (-10) + (-7) 14 + (-7) 7 7.
  83. Calculus

    The Dot Product is a scalar (number) (4 * 5) + (5 * -2) + (-1 * 7) 20 + -10 + -7 10 + -7 3 3.
  84. Psychology

    According to Freud, defense mechanisms are protective methods, by the ego, that reduce anxiety by unconsciously distorting reality. Definitions & Examples: Repression - banishing anxiety-arousing thoughts, feelings, and memories from consciousness. e.g. blocking out your ...
  85. Math

    There are 16 oz in 1 lb. So, 1 lb 4 oz = (1 * 16) + 4 = 20 oz -- Each day, Robert feeds his dog 20 oz If the bag is 40 lbs, and 1 lb = 16 oz -- The bag is 640 oz 640 oz of food, divided by 20 oz servings -- It will last 32 days.
  86. choice

    Healthy behaviors and choices are decisions made when one is conscience of their overall health status, and thus will lead to minimized negative consequences. Overtime, this will positively affect an individual's health status. Conversely, behaviors that are unhealthy ...
  87. math

    2 & 3 are both factors of 6. Meaning whenever 6 goes in a set, it can be replaced by two 3's or three 2's. 6 * 4 6 * 3; 3 * 2 6 * 3; 2 * 3 6 * 2; 3 * 4 6 * 2; 2 * 6 6 * 2; 3 * 2; 2 * 3 6 * 1; 3 * 6 6 * 1; 2 * 9 6 * 1; 3 * 4; 2 * 3 6 * 1; 3 * 2; 2 * 6 6 * 0; 3 * 8 6 * 0...