1. Math

    Working with simple addition and multiplication of positive and negative numbers. Have completed 59 of 60 problems on a worksheet, I am stumped by one of them. For example Two numbers are given 30 and 13, You must find two number multiplied together equal

    asked by Linda on April 9, 2008
  2. Algebra

    1.)Which of the following statements is true? Positive numbers are always rational numbers. Negative numbers are always irrational numbers. Negative numbers are sometimes rational numbers.********* Negative numbers are always integers.

    asked by Katy on January 3, 2019
  3. Algebra

    What is the length of the interval of solutions to the inequality 1 ( is less than or equal to) 3-4x (is less than or equal to) 9? I presume that I just plug in numbers for x? The problem is, that all the positive numbers I've tried have made them way less

    asked by Elle on January 20, 2009
  4. honors algebra 2

    the product of two negative numbers is 338. one of the numbers is half the other number. find the numbers.

    asked by ryan on September 30, 2007
  5. Math

    A number less 7 is greater than -45. How can the solutions for this inequality be described? Is -40 a solution? A) All numbers less than -38.; yes B) All numbers greater than -38.; no C) All numbers less than or equal to -38.; yes D) All numbers greater

    asked by Anonymous on February 16, 2018
  6. math

    The product of 2000 negative numbers could equal. A. -200 B. -1 C. 0 D. pi

    asked by hila on July 27, 2015
  7. algebra

    true or false 1. fraction cant be written as decimal. 2. natural numbers are referred to as counting numbers.whole numbers consists of counting numbers.whole numbers consist of counting numbers as well as the number 0 3. intergers do not include negative

    asked by samanthast on August 31, 2008
  8. math

    ok i get the whole FOIL thing but what if there's negative numbers? and what do you if there's an addition and a subtraction? ex. (mn-m^2)(-n+m) you treat negative numbers just like positive numbers (for instance; (6x+3)(2x-2), 1st-6x*2x=12x^2, outer-

    asked by heather on February 19, 2007
  9. Math

    i^6 = (i^2)^3 = (-1)^3 = -1 The square, not the square root of -1 is 1. :) B.t.w., can you prove that -1 times -1 is 1? Hint, try to prove first that for any number X: -1 times X equals -X How do you find the square root of -1? The square of any real

    asked by Count Iblis on November 15, 2006
  10. Maths

    is it possible to find a sequence with the ruleadd four for wich all terms are multiples of four and eight all terms are even numbers all terms are negative numbers none of the terms are whole numbers if so tell me the sequence our i will die It's not

    asked by Carla on October 17, 2006
  11. algebra

    question The square root of a negative number is imaginary. That is you cannot find, for example, sqrt(-49) . Why? my answer Yes you can, however this is aginst the normal operations non the less we are dealing with iminiganary numbers so, as such the

    asked by tony on June 30, 2008
  12. Math halp plz

    Order the set of numbers from least to greatest: negative 5 over 6, negative 5, negative square root 26, negative 31 over 6 I think it's negative 5 over 6, negative 31 over 6 negative 5, negative square root 26,

    asked by 0<0!! on August 16, 2016
  13. Please check my Caclulus

    1. Find all intervals on which the graph of y=(x^2+1)/x^2 is concave upward. A. (negative infinity, infinity) B. (negative infinity, -1) U (1, infinity) C. (negative infinity, 0) U (0, infinity) D. (1, infinity) E. none of these I got C. I found the second

    asked by Anonymous on January 12, 2015
  14. Math

    When studying integers, zero is _________. Select one: a. a positive b. neither a positive nor a negative. c. a negative Question 3 On a number line the numbers to the right are _________ numbers to the left. Select one: a. equal to b. great than c. less

    asked by paragonnova on April 13, 2013
  15. math - algebra

    When solving equations by adding integers, what does it mean when one number is in parenthisis? Do you do something different when they are in parenthisis? Example below: 36 + (-28) + (-16) + 24 = y Thank you Numbers in parenthesis means the number is what

    asked by Denise on August 18, 2006
  16. Math 115 #20

    Label each statement as true or false a. All integers are real numbers. b. All negative integers are whole numbers. c. Zero is neither positive nor negative. d. All integers are whole numbers. I think all answera are TRUE am I correct

    asked by Deb on January 9, 2009
  17. Math

    Can you subtract two negative numbers and get a positive difference? What are some examples, if it's possible? Can you add two negative numbers and get a positive sum? (I fairly certain it's not possible, but I'm not sure how to explain why it's not...)

    asked by Anonymous on December 11, 2014
  18. Math

    How you multiply/divide negative numbers,negative with positive numbers?

    asked by Konstantin on September 27, 2011
  19. math

    what is the factorial of a negative number? The factorial function has singularities at the negative integers. You can see this as follows. For integers we define: (n+1)! = (n+1)n! and we put 0! = 1 So, from 0! you can compute 1! and from that you can

    asked by chris on July 10, 2007
  20. math

    Need to find the real number. Someone performed a trade of 20,000 less than it made, this caused a negative trade balance. To represent the quanity as a real number when I know that a positive real number names the points to the right of 0 on the number

    asked by geo on March 30, 2007
  21. Algebra :P... again

    Hi! Sorry.. but 1 more question? Direction: Find the domain of the function. Problem: y = - 1 0 / 1 1 - x [A] All real numbers except x= -11 [B] All real numbers except x= 0 [C] All real numbers except x= 10 [D] All real numbers except x= 11 Also.... if

    asked by Jason on August 20, 2007
  22. Math Poster Project

    I have do complete a poster for math but I have some confusing instructions at first. Please help me understand and provide an example using the directions below that were given to me: Choose four rational numbers. At least two of your numbers should be

    asked by Person on October 5, 2013
  23. math

    dentify the line that contains the error in this solution and correct the work for that line. Negative two times x plus one minus three is greater than or equal to eleven Negative two x plus negative two minus three is greater than or equal to eleven

    asked by bucky on September 20, 2011
  24. programming

    for a list of numbers entered by the user and terminated by 0, find the sum of the positive numbers and the negative numbers

    asked by nancy on May 16, 2010
  25. Math

    We are adding positive and negative numbers. The question is State positive or negative or it depends along with my answers. Are these correct? Positive + positive: positive Positive + negative: it depends Negative + negative: negative Positive –

    asked by Carly on February 12, 2016
  26. Maths

    The product of two natural numbers is 18. If one is added to four times the smaller number this is equal to the larger number. Find both numbers

    asked by Shelly on April 18, 2016
  27. Math

    The product of two consecutive negative integers is 2,070. What are the numbers?

    asked by Anonymous on April 25, 2016
  28. 6th grade

    explain how you would decide whether the product of three numbers is positive or negative

    asked by Anonymous on December 7, 2010
  29. Geometry

    Consider the following figure. A number line with point A at negative 2, point B at negative 1, point C at 1, point D at 3, point F at 4.5, and point G at 6. Find AD, CG, and BD. Enter your answer as three numbers. Separate the numbers by commas, like

    asked by Sergio on March 6, 2019
  30. Math

    What two numbers when multiplied = -16 and when added = 10, also one number is negative the other is positive in this answer.

    asked by Jquez on March 5, 2012
  31. Math

    An ordered triple of real numbers (a,b,c) is called friendly, if each number is equal to the product of the other 2. How many friendly triples are there? Details and assumptions The numbers need not be equal to each other. The numbers need not to be

    asked by Jack on April 10, 2013
  32. Math (Number Theory )

    An ordered triple of real numbers (a,b,c) is called friendly, if each number is equal to the product of the other 2. How many friendly triples are there? Details and assumptions The numbers need not be equal to each other. The numbers need not to be

    asked by Jack on April 10, 2013
  33. maths

    evaluate;1 x 10 negative 5-(2x10 negative -6) Get both numbers to the same power, and then subtract.

    asked by Anonymous on June 11, 2007
  34. Math

    How do I help my little brother with negative numbers? He doesn't understand when it is positive and when it is negative.

    asked by Christina on May 1, 2011
  35. maths

    the sum of N positive integers is 19. what is the maximum possible product of these N numbers? thx. Nice problem. Let's look at some cases 1. N=2 clearly our only logical choices are 9,10 for a product of 90 It should be obvious that the numbers should be

    asked by Jarin on July 22, 2007
  36. math 116

    What is the difference between domain and range? The domain of a function is the set of all values for the independent variable (in the following example, that's the x) for which the function is defined. That is, if you have a function such as f(x) = 1/x

    asked by sue on January 7, 2010
  37. Algebra

    Did I do thes right? 1. Suppose you are at the gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: a) What does the number 3.03 represent? The cost for one gallon of

    asked by A.W. on February 28, 2009
  38. math

    What is a negative 588 divided by two numbers that equal the sum of 7?

    asked by erin on January 23, 2013
  39. algebra/ inequalities

    Posted by lauren on Thursday, April 17, 2008 at 8:45pm in response to ALGEBRA. the problem is 92 is greater than or equal to negative 4p. why is the answer p is greater than or equal to negative 23? I am confused! why is it not p is less than or equal to

    asked by lauren on April 17, 2008
  40. Algebra

    You playing a board game. All even numbers are positive, and all odd numbers are negative.a positive number indicates forward movement and a negative number indicates backward movement. During your last 10 turns you have gone back 90 spaces.if you spun the

    asked by Kaito on August 30, 2018
  41. econ 1150

    Using the data under D1 and D2, calculate the cross elasticity of Lorena’s demand for golf at all three prices. (To do this, apply the midpoints approach to the cross elasticity of demand.) Instructions: Round your answer to two decimal places. If you

    asked by Anonymous on June 18, 2018
  42. Algebra

    The function 5x^2+2x-1's domain is all real numbers, according to the answer key. However, I don't know how to factor this to prove it. Could you show me? The function the sq. root of y-10 has a domain of all numbers so that y is greater than or equal to

    asked by Anneliese on November 1, 2009
  43. Math

    : PROGRAM: PYTHAG : Prompt A, B :Fix 2 ã : (A2 +B2) ¨ C :Disp "C=",C : Float Choose the three true options concerning this program. Options A) The program can be used to find the length of the hypotenuse of a right-angled triangle. B) The program can

    asked by Dave on June 12, 2010
  44. Calculus

    f is a continuous function with a domain [−3, 9] such that f of x equals 3 for x between negative 3 and 0 including negative 3, equals negative 1 times x plus 3 for x between 0 and 6 inclusive, and equals negative 3 for x greater than 6 and less than or

    asked by Ke$ha on May 12, 2017
  45. college algebra

    if you have a problem where you are multiplying numbers with exponents (both positive and negative) and your answer ends up with a negative exponent what is the reason you make a fraction out of it and put it on the bottom as a positive? why cant you have

    asked by tara on February 14, 2008
  46. mathematics

    the sum of two numbers is 31. 2/3 of one of the numbers added is equal to 5/8 of the other.find the two numbers

    asked by Blessing on October 23, 2016
  47. algebra

    the equation is f(x) = (1/sq. root of 1-x^2) 1. f(x) is never zero. 2. 0 is in the domain of f 3. All negative real numbers are in the domain of f 4. All positive real numbers are in the domain of f 5. 1 is in the domain of f 6. f(x) is never negative 7.

    asked by Josh on September 24, 2010
  48. mathematics-Algebra

    I think of two whole numbers;the product of the average of the sum and difference of the numbers and the difference of the sum and difference of the numbers is 12.if three times the first added to the second makes up 11..find the two numbers please show

    asked by p1 on March 20, 2016
  49. math

    i don't know how to do mixed numbers with negative and positive numbers, if anyone can point me in the right direction i would be thankful!

    asked by bondy on November 13, 2018
  50. math

    the sum of two numbers exceeds their product by one. their differences is equal to their product less five . find the two numbers

    asked by seraphine on December 3, 2015
  51. Excel

    Values in a function: A. must be spelled out in words, not numbers B. must be entered as whole numbers. c. Can be a cell or a range of cells D. Cannot have a negative value.

    asked by Dianna on September 25, 2015
  52. College Algebra

    The sum of two numbers is less than 12. The second number is 8 more than the first. What are the possible values for the first of the two numbers? Your problem would look like this X+(X+8)

    asked by Karen on July 25, 2007
  53. math

    what are the rules to adding and subtracting negative numbers and positive numbers?

    asked by karan on September 13, 2011
  54. Math

    Show me how to solve problems like this. 1.) 7 + (-9) + (-5) + 6 2.) [(-3)(-4)(-5)]/ (-2)(-3)] Try reading the following sites' pages very carefully. Then make an attempt at doing the problem, and we'll see if you got it right:

    asked by Walter on June 6, 2007
  55. Algebra

    My answer *** What is the product of (–6.8)2? a. –13.6 b. 46.24*** c. –46.24 d. 13.6 2.   Simplify the expression - Square root 196 . a. 98 b. –14*** c. 14 d. 392 3.   Simplify the expression square root 100/49 . a. 10/7 b. 17*** c. 5/7 d. 20/7

    asked by c on September 28, 2016
  56. Algebra II

    PLEASE HELPPPPPP What are the possible numbers of positive, negative, and complex zeros of f(x) = x4 + 3x3 − 2x2 + 1? (6 points) Positive: 2 or 0; negative: 2 or 0; complex: 4, 2, or 0 Positive: 2, or 0; negative: 4, 2 or 0; complex: 4, 2, or 0 Positive:

    asked by HHELLPPPPPP on December 6, 2016
  57. math, algebra

    my question is : on the following i have to graph them i just want to know if i am correct. for : x > 4 the line is going through in a straight line on number 4 in the y axis for: 3x greater than or equal to 2x - 4 the answer is after solving: x is less

    asked by jasmine20 on December 21, 2006
  58. MATH HELPPPP!!!!!

    If the sum is zero, what is the relationship of the two numbers? (this is an integers question--adding and subtracting-multiplying-and deviding positive and negative numbers)

    asked by Mary on November 22, 2008
  59. domain

    Find the domains of f and f' 1, f(x) = xe^x 2. f(x) = x^(3/5) 3. f(x) = x/(x-2) TIA 1) R 2) It's the interfal from zero to infinity for f but for f' it is this inteval with zero excluded, because unlike f, f' is singular at zero. 3) Here only the point 2

    asked by Jen on November 9, 2006
  60. math

    find each sum or difference 1. -1/2 + 1/3 1. -1/6 2. -1/3 3. 2/3 4. 1/6 I got 2/3 because I added the 2 numerators and got 2 then I kept the LCM as the denominator so I got 2/3. 2. -3 1/5 + -6 1/2 1. -3 2/7 2. -3 7/10 3. -9 2/7 4. -9 7/10 I got number 3

    asked by { Alice} please helppp on October 12, 2017
  61. Physics

    Three objects with masses m1 = 36.3 kg, m2 = 17.7 kg, and m3 = 11.1 kg are hanging from ropes that are redirected over pulleys. What is the acceleration of m1? Negative numbers for downward, and positive numbers for upward, please.

    asked by Ebu on March 14, 2011
  62. MATH

    what are the rules to multiplication with negative numbers and positive numbers?

    asked by KAREN on September 14, 2011
  63. math

    how come in y=x^2, the range is all real numbers, y is greater than or equal to 0 or is it for x=y^2? in y=x^2 imagine any choice of x (the domain) you might make. No matter what x you choose, once you square it, it becomes positve. So y can never be a

    asked by lucy on March 20, 2007
  64. Math

    1. What is the simplified form of the expression? 2x2 + 4y + 3x2 – 2y + 3y (1 point) 5x4 + 5y2 5x2y + 5x2y 5x2 + 5y 10x2y 2. Simplify the following expression: 2(6x + 18) (1 point) –12x + 36 8x + 20 6x + 36 12x + 36 3. What is the product? 4 • (–5)

    asked by helper on September 13, 2018
  65. Math

    Find all sets of integers {x,y,z} such that when any one of these numbers is added to the product of the other two numbers, the result is always 2.

    asked by alex on January 29, 2009
  66. cms

    suppose in a positive numbers(including o) and the negative numbers are to be separately counted. a) draw a flow chart. write the pseudo code.

    asked by osele madighi on November 16, 2016
  67. ALGEBRA 3

    if f{x}= negative x square - 7x - 22, what is f{negative 5}? a.negative 82 B.NEGATIVE 32 C. 12 D. NEGATIVE 12 Your problem: f(x) = -x^2 - 7x - 22 To find f(-5), substitute -5 for x. Watch your signs. I hope this helps.

    asked by Darius Graham on January 11, 2007
  68. Math help!

    Place the following set of numbers in ascending order. -2/11, 5/8, 1/8, -1/9, 4/9 Well start by putting the most negative number first. 5/8 is bigger than 4/9. And 4/9 is certainly bigger tnan 1/9. Give it a try and I'll tell you if you get it right -1/9,

    asked by carol on March 25, 2007
  69. 5th Grade Math/Making a Duplicate

    I need help with a worksheet that has a line going down with a y with positive numbers at the top and negative numbers at the bottom and the it has a line going across with an x with negative numbers on left and positive on right. It has a tic tac toe

    asked by Schwann on March 29, 2011
  70. Math/Corrdinate Plane

    I need help with a worksheet that has a line going down with a y with positive numbers at the top and negative numbers at the bottom and the it has a line going across with an x with negative numbers on left and positive on right. It has a tic tac toe

    asked by Schwann on March 29, 2011
  71. algebra 1

    I am having trouble with this problem. I have an equation written down but I have my doubts as to how correct it is. I am thinking of 3 consecutive negative numbers. If I multiply the first with the second and then subtract three times the third, the

    asked by Dippy on March 7, 2009
  72. Basic Math Help Please?

    find the next two positive and negative angles coterminal with the quadrantal angle. 90 degrees. I am really confused, what would the two positive and two least negative numbers be? i know it you add or subtract 360.

    asked by jaret on August 29, 2011
  73. Math

    How do I figure out how to write two pairs of numbers that have a sum of -2 5/12.One pair must be negative and one pair must be negative and positive.Thanks, any help is appreciated.

    asked by Payton on September 2, 2014
  74. chemistry

    You will be presented with three crystallographic directions drawn in a unit cell. Please write the identity of the direction in the space provided below each picture. Use the correct form of brackets for describing a direction, and leave no spaces between

    asked by A on June 2, 2013
  75. chemistry

    You will be presented with three crystallographic directions drawn in a unit cell. Please write the identity of the direction in the space provided below each picture. Use the correct form of brackets for describing a direction, and leave no spaces between

    asked by Anonymous on June 1, 2013
  76. Math

    What is 2 + 2? = 4 What is 2 * 2? = 4 So, the sum and the product of these two numbers is the same. Are there other numbers that have this same property? Yes Determine all number pairs x and y such that the product of x and y and the sum of x and y are

    asked by Kylie on August 24, 2011
  77. chemistry

    You will be presented with three crystallographic directions drawn in a unit cell. Please write the identity of the direction in the space provided below each picture. Use the correct form of brackets for describing a direction, and leave no spaces between

    asked by nonu on June 1, 2013
  78. pre-calculus 11

    I have the question y=-|x^2 -9| I am asked for the piecewise function. I have written y={-x^2 +9 if x less than equal to -3} { x^2 -9 if x is greater than equal to 3} I am wondering if I have my are signs backwards.My reasons for choosing the signs I have

    asked by george on June 14, 2015
  79. pre-calculus 11

    I have the question y=-|x^2 -9| I am asked for the piecewise function. I have written y={-x^2 +9 if x less than equal to -3} { x^2 -9 if x is greater than equal to 3} I am wondering if I have my are signs backwards.My reasons for choosing the signs I have

    asked by george on June 10, 2015
  80. Algebra I

    Tell whether the set is closed under the operation. If it is not closed give an example that shows that the set is not closed under the operation. 10. Positive irrational numbers; division 11. Negative rational numbers; multiplication 12. Negative

    asked by Anonymous on October 26, 2017
  81. algebra

    Okay, how do you factor a polynomial when there is a number in front of the highest x term. For example: how would you factor 2x^2-11x+15 i know the answer is (2x-5)(x-3), right? So you put the 2x on one side and then you put an x on the other. And then

    asked by Fidelia on May 15, 2007
  82. Math

    When factoring a trinomial that is in the format Ax^2 + Bx + C, the number that is represented by B should be viewed as the _____? a. product of two numbers b. the sum of two numbers c. square root of two numbers d. remainder of two numbers I believe it

    asked by Jackie on October 7, 2008
  83. Ross

    If seven times a number is added to the squares of the number and the result is negative twelve, what are the numbers?

    asked by Stephanie on August 13, 2016
  84. Math

    If seven times a number is added to the squares of the number and the result is negative twelve, what are the numbers?

    asked by Stephanie on August 13, 2016
  85. algebra

    I cant get this one nither I tried like 4 times to get right answer. 5x+12-3x=-2x-13-x x=-5 5x+12-3x=-2x-13-x First, let's get the unknowns on one side of the equation and the knowns on the other side. 5x - 3x + 2x + x = -12 - 13 5 x = -25 x = - 5 ok I

    asked by chrissy on August 1, 2007
  86. C programming

    Enter two integers between 1 to 10 3 4 Both numbers are less than 5. The sum of two numbers is:-1081825676 The product of two numbers is:-1081825680 why are the sum and product so weird? my code: #include int main() { int x; int y; int z; int p; int

    asked by jen on October 9, 2008
  87. Algebra

    I need help with algebra unit 3: rational numbers. 1which exponent makes the statement true? 1/5^9=5 A.9 * B.-9 C.1/9 D.-1/9 2. Y^5 • Y^14= A. 2y^19 B.y^60 * C.y^19 D.2y60 3. W^12/w18 A.w30* B.w^-30 C.w^6 D.w^-6 4. Using the numbers 3,2, and 4, which of

    asked by Boi on September 11, 2018
  88. Algebra

    3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

    asked by John on March 18, 2013
  89. Algebra

    3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

    asked by Joe on March 18, 2013
  90. Algebra

    kaylin throws two dice. the difference in face value between the two dice is three, and the product of the numbers thrown is equal to twice the sum of two numbers. Write and solve an algebraic equation that finds the numbers kaylin threw.

    asked by JD on May 3, 2012
  91. algebra

    Stacey throws two dice. The difference in face value between the two dice is three, and the product of the numbers thrown is equal to twice the sum of the two numbers. Show and solve an alebraic equation that finds the numbers Stacey threw.

    asked by Ella on April 27, 2011
  92. Algebra

    Suppose you are at the gas station filling your tank with gas, The function C(g) represents the cost C of filling the tank up the gas tank with g gallons. Give the equation: C(g)=3.03g a) What does the number 3.03 represent? The cost of one gallon of gas;

    asked by A.W. on February 28, 2009
  93. algebra

    Plug in (-1) for x. It will look like this: f(-1) = 4 *(-1) - 3 four times negative 1 equals negative 4, so... f(-1) = -4 - 3. negative four minus three is easiest to figure out with a number line...it equals negative seven. So: f(-1) = -7. And you're

    asked by Stacy on May 18, 2007
  94. math

    the equation is f(x) = (1/sq. root of 1-x^2) 1. f(x) is never zero. 2. 0 is in the domain of f 3. All negative real numbers are in the domain of f 4. All positive real numbers are in the domain of f 5. 1 is in the domain of f 6. f(x) is never negative 7.

    asked by andy on September 23, 2010
  95. math

    If the product of 1999 real numbers is -1998, at least how many of these 1999 real numbers must be negative? A. none B. 1 C. 1997 D. 1998

    asked by timothy on July 22, 2015
  96. Math

    When you multiply a positive number by a negative one, what is the sign of the answer? a. always negative b. always positive c. always the same sign as the larger of the two numbers d. always the same sign as the first of the two numbers I believe the

    asked by Jen on October 7, 2008
  97. Math

    1)Give 2 examples in which negative numbers can be used in describing a measurement or an event. 2)Write each rational number in the form, A/b, where a and b are integers and b is not equal to 0. example A: 0.7 ________ Sorry don't get the above

    asked by Anonymous on September 18, 2007
  98. Algerba II

    Hi Do decimals such as 2.718 represent rational numbers or irrational numbers. Explain. Do repeating decimals such as 2.3333 . . . represent rational numbers or irrational numbers? Explain. So I look back in my textbook and find rational numbers (e.g.,

    asked by Algerba II on August 26, 2008
  99. Math

    1) for any three consecutive numbers, what can you say about odd numbers and even numbers? Explain. 2 A)Mirari conjectures that, for any three consecutive numbers, one number would be divisible by 3. Do you think Mirari is correct? Explain. 2 B) Gia claims

    asked by Ali on October 9, 2017
  100. math

    Two non-negative numbers are chosen such that their sum is 30. Find the numbers if the sum of their squares is to be a maximum. Explanation to solve this would help !

    asked by David on April 10, 2013

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