1. math

    At a sports carnival,the ratio of number of pupils sent by school A,B and school C to the event was 1:2:3. The number of boys from school A and the number of girls from school B were the same. The ratio of the number of girls from school C to the total
  2. Math

    You have 100 pieces of candy in five bowls. The sum of candy in bowl a and bowl b is 30 pieces. The sum of candy in bowl b and c is 36 pieces. The sum of candy in bowl c and bowl d is 49 pieces of candy. The sum of bowl d and bowl e is 47 pieces of candy.
  3. Math homework

    Tell whether each number is a real number, rational number, irrational, interger, or whole number, and then order then from least to greatest. ( Square root sign) 49, 8, -( square root sign) 4, and -3. Could someone explain to me how they found the answers
  4. Math

    How do I figure out -144/4 to find out if it is a natural number,a whole number, an interger, if it is a rational or irrational number,or a real number? I don't want direct answers i would like to understand how I would go about solving to figure it out on
  5. Math

    In the roulette game, what is the probability of an outcome of: Any odd number Any green number Any number that is red or green Any number that is red and even
  6. Math

    Which verbal expression represents the algebraic expression? (A) 2 times a number minus 6 (B) twice the difference between 6 and a number (C) 6 less than twice a number (D) twice the difference between a number and 6 I think it's A, am I right? Thank You
  7. Algebra

    A stamp collection consists of 3¢, 12¢, and 15¢ stamps. The number of 3¢ stamps is three times the number of 12¢ stamps. The number of 15¢ stamps is three less than the number of 12¢ stamps. The total value of the stamps in the collection is $2.43.
  8. Number Line

    If an integer a is pictured on the number line then the distance from the point on the number line that represents the integer to the origin is ƒaƒ. Using this idea answer the following. a. Explain why ƒa 2 bƒ is the distance between the points that
  9. Math

    he number of bacteria in a culture is modeled by n(t)=1710e071t (a) The initial number of bacteria is (b) The relative rate of growth of this bacterium population is (c) The number of bacteria after 3 hours is (d) After how many hours will the number of
  10. Computer Science

    Define an unambiguous context free grammar that generates the language of strings containing a series of a's followed by a series of b's followed by a series of c's concluding with a series of d's. The number of a's must be exactly the sames as the number
  11. math

    The number of bacteria in a culture is modeled by n(t)=1710e071t (a) The initial number of bacteria is (b) The relative rate of growth of this bacterium population is (c) The number of bacteria after 3 hours is (d) After how many hours will the number of
  12. 2 Math Questions

    1) What do you do to check whether a number is rational or irrational? Use an example of a rational and an irrational number. 2) How does finding the square root [√] of a number compare to finding the cube root [^3√] of a number? Use the number
  13. Science

    3 resistors having the same resistance value are wired in parallel, how does the equivalent resistance compare to the resistance value of a single resistor? 1) The equivalent resistance is thrice the value of a single resistor. 2) The equivalent resistance
  14. quad eq

    square of a certain number decreased by 9 times the number is 36 . what is the number Goodness. You have to start to try these, and let us critique. There is nothing like the mind working on its own. N^2-9= what bob, appreciate the sentiment, but if i
  15. ALGEBRA 1

    Use inductive reasoning to predict the next Number in each sequence. 1.3,7,11,15... i figure this to be 19 because each number following the first is a difference of 4. 2. 1,-2,4,-8 this is abit difficult for me. I am guessing the answer tobe 10. I
  16. Math, ( Help please?)!

    Tell whether each number is a real number, rational number, irrational, interger, or whole number, and then order then from least to greatest. ( Square root sign) 49, 8, -( square root sign) 4, and -3. Could someone explain to me how they found the answers
  17. Math.. 3rd time posting /: HELP PLEASE!

    Tell whether each number is a real number, rational number, irrational, interger, or whole number, and then order then from least to greatest. ( Square root sign) 49, 8, -( square root sign) 4, and -3.
  18. Math

    Write the algebraic expressions for the following. Please check and correct me if I'm wrong!! 1. 3 less than 5 times a number. Answer: 5x-3 2. 18 fewer than half a number. Answer: 1/2x-18 3. 3 more than the quotient of a number and 2. Answer: x/2+3 4. 4
  19. chemistry help!!! (clueless)

    how do i find the mass number of chemicals I would think that you would add up the components masses (molecular masses [from periodic table) that make up the chemical... like...HCl (H= 1.008g/mol, Cl= 35.45g/mol) added= 36.458g/mol hope this helps=)
  20. math

    in a game you draw a card with three consecutive numbers on it. You can choose one of the numbers and find the sum of its prime factors. then you can move that many spaces. You draw a card with numbers 25, 26, 27. Which number should you choose if you want
  21. Math (fibonacci

    A sequence of numbers is called a Fibonacci-type sequence if each number (after for the first two) is the sum of the two numbers which precede it. For example, 1, 1, 2, 3, 5, 8 ... is a Fibonacci- type sequence. If 1985, x, y, 200 are four consecutive
  22. math

    a number line below -5 -4 -3 -2 -1 0 1 2 3 4 5 Which of the expressions below represent the distance between -4 and 5 on the number line? [ ]= absolute value symbol A. [-4+5] B.[4-5] C.[-4-5] d.[-5-(-4)] I believe it is D, since the absolute value of a
  23. english

    COMMUNITY EAST HOSPITAL To call a Patient Dial Direct 395-8 Plus Room Number EMERGENCY ROOM……………….(NNN) NNN-NNNN/p> Main Number 1700 W 7th………………………395-8100 Billing Department………………(NNN)NNN-NNNN/p> Chemical
  24. math(adding mixed fractions)

    please help me with (addition mixed fractions)i cant get it!!! ---addition with mixed numbers--- 1.which of the following is not true for adding mixed numbers? A.the denominators of the fractions must be the same in order to add them. B.you can add mixed
  25. chemistry

    Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? A. Magnesium has a 22 oxidation number and chlorine has 1+ oxidation number. B. Magnesium has 1+ oxidation number and chlorine has a 12 oxidation number. C.
  26. Math - Sum of a Series

    Find the sum of the series 23 + 18 + 13 + . . .+ (-82) A) -590 B) 590 C) -649 D) 649
  27. Math

    Which of the following is a certain event? A. Rolling a composite number on a number cube B. Rolling a number greater than 1 on a number cube C. Rolling an odd or even number on a number cube D. Rolling a number greater then 7
  28. algebra

    At a pharmacy, customers take a number to reserve their place in line. If the product of the ticket number now being served and the next ticket number to be served is 110, what number is now being served?
  29. Mystery number

    the mystery number is a two didget even number.it is a multiple os 2,4,5,and 10 but not a multiple os 3 or 7. If you count by sixes there will be two left iver. What is rhe mystery number. Please explaine how you figured it out.
  30. Math

    Enter the sum of numbers as a product of their GCF. 27 + 36 The sum of the numbers as a product of their GCF is ____ * (____ +_____).
  31. math

    Enter the sum of numbers as a product of their GCF. 27 + 36 The sum of the numbers as a product of their GCF is ____ * (____ +_____).
  32. math for the middle school and elementary teacher

    Which one of the following situations a permutation? a) the number of ways 10 people can be lined up in a line for basketball tickets. b) The number of possible four member bowling teams from a family of six siblings. c) The number of ways to choose a
  33. Comparing

    A Middle Eastern restaurant recorded the number of times 2 dinner appetizers, hummus and baba ghanoush, were ordered every day for 1 month. The restaurant calculated the mean number of times each appetizer was ordered and the MAD (mean absolute deviation)
  34. Math

    1.The number of apples, a, is 6 less than half the number of pears, p. Write an expression that represents the number of apples in terms of the number of pears. 2.Which equation can be used to solve the following word problem? Jason has 4 more nickels than
  35. MATH HELP

    1)What is the simplified form of the following expression? 2x^2y+3x^2+4y+3x^2y+2y A)5x^4y^2+3x^2y+2y B)8x^2y+6y^2 C)5x^2y+3x^2=6y D)14x^2y 2)Simplify the following expression 1/3 (21m+27) A)7m+27 B)7m+9 C)63m+9 D)7m+81 3) What is the sum 7/4+(-1/5) A)31/20
  36. Math

    In a collection of nickels, dimes, and quarters worth &6.90, the ratio of the number of nickels to dimes is 3:8. The ratio of the number of dimes to quarters is 4:5. Find the number of each type of coin. Use a coin value chart to help. well, 4:5 is the
  37. Math

    There are 12 girls and 9 boys in Mrs. Johnson's classroom. She said that if she randomly selects one student from her classroom the probability that it is a boy is 3/4. Which mistake did Mrs. Johnson make? A. She divided the number of girls by the total
  38. Math

    There are 12 girls and 9 boys in Mrs. Johnson's classroom. She said that if she randomly selects one student from her classroom the probability that it is a boy is 3/4. Which mistake did Mrs. Johnson make? A. She divided the number of girls by the total
  39. Math

    Guess and Check is an important problem-solving strategy. Use guess and check to solve each puzzle. a) A number times itself is 100. What is the number? b) A number times itself is 225. What is the number?
  40. Problem Solving

    Carl is trying to find a combination. It's written in a riddle. Find 2/3 of the final number, add 16, and this number will equal two times the mystery number. What was the final number of the combination?
  41. Brain Teaser

    When Professor Sum was asked by Mr. Little how many students were in his classes, he answered, “All of them study either languages, physics, or not at all. One-half of them study languages only, one-fourth of them study French, one-seventh of them study
  42. Math

    Use symbols to represent unknowns and variables. Write inequalities to answer questions arising from situations. 1. Ten less than a number, x, is greater than 32. 2. A number, n, decreased by 6 is less than or equal to 4. 3. One half of a number, increased
  43. AP and GP

    1) Given the terms a35 = 1238, a70 = 1483 of an AP. Find the exact value of the term a105 a sequence, and sum of sequence. 2) Given the term a3 = 99 and a5 = 891 of GP. Find the exact value of the term a7 of the sequence and the sum of sequence.
  44. Counting and Probability

    What is the difference between the sum of the first 400 even counting numbers and the sum of the first 400 odd counting numbers?
  45. math

    In 2009, there were 12 million fewer acres of farm land in Arizona than there were in 1980. If the sum of acreage for these two years is 64 million acres, find the number of farm land acres in Arizona for each of these years.
  46. Math

    The number of boys in a class is 10 less than twice the number of girls. Find the total number of the students in the class, if the number of boys is 5 more than the number of girls.
  47. Math

    The number of boys in a class is 10 less than twice the number of girls. Find the total number of the students in the class, if the number of boys is 5 more than the number of girls.
  48. Math check

    1. If LMNO is a parallelogram, and LM=2y-9 and NO=y-2, find the value of 'y'. Does y=7? 2. RSTV is a parallelogram. RT and SV intersect at Q. RQ=5x+1 and QT=3x+15. Find OT. Does QT=7? 3. RATS is a parallelogram. If angle s= (8x) and angle t=(7x) then find
  49. algebra

    a piece of wire that is 58cm long is cut into three pieces. the longest piece is 6cm shorter than the sum of the lengths of the other two pieces. five times the lengths of the shortest piece is 10cm less than the sum of the lengths of the other two pieces.
  50. Math

    Rewrite the middle term as the sum of two terms and then factor completely. x2 + 19x + 90 Factor completely. ax – ay + x2 – xy Rewrite the middle term as the sum of two terms and then factor by grouping. x2 + 4x – 12 Complete the following statement.
  51. Physics

    Draw the figure. You have the following equations that you can write: a) Sum Vertical Forces=0 b) Sum horizontal forces=0. Remember that at the upper part of the ladder, there is a horizontal force (only). c) Sum of moments about any point, I suggest the
  52. Math

    the only perfect number of the form x(n) + y(n) A perfect number is an integer that is equal to the sum of its positive divisors (not including itself). Therefore, 6 is a perfect number, since its positive divisors are 1, 2, and 3 and 1+2+3 = 6. 28, 496,
  53. series

    2(a)Consider the arithmetic progression with terms A3=-2 and A12=23. Find the sum of A1+......+A40 (can do) (b)In 1800 the population of England was 8 million. The economist Malthus (1766-1834) produced a hypothesis, suggesting:-that the population of
  54. Series

    2(a)Consider the arithmetic progression with terms A3=-2 and A12=23. Find the sum of A1+......+A40 (can do) (b)In 1800 the population of England was 8 million. The economist Malthus (1766-1834) produced a hypothesis, suggesting:-that the population of
  55. Math

    2(a)Consider the arithmetic progression with terms A3=-2 and A12=23. Find the sum of A1+......+A40 (can do) (b)In 1800 the population of England was 8 million. The economist Malthus (1766-1834) produced a hypothesis, suggesting:-that the population of
  56. MATH

    A four by four grid of unit squares contains squares of various sizes (1 by 1 through 4 by 4), each of which are formed entirely from squares in the grid. In each of the 16 unit squares, write the number of squares that contain it. For instance, the middle
  57. Discrete Structures

    a. Show that in any set of n integers, there is a subset whose sum is divisible by n. b. Show that for any integer n, there is an integer whos digits (in decimal representation) consist of only 0 and 1. I don't think the first can be proved. However, in a
  58. Math

    At the start, a biologist counts M microbes in a sample. Every day after that, the number of microbes  in the sample, is multiplied by some number N.   Write the expression for the number of microbes in the sample 1) after day one  2) after day two Use
  59. science

    You know that a collision must be "elastic" if: The momentum of the two-object system doesn't change The sum of the final kinetic energies equals the sum of the initial kinetic energies There is no change in the internal energies of the objects (thermal
  60. programming 2

    Write a program that inputs a word representing a binary number (0s and 1s). First, your program should verify that it is indeed a binary number, that is, the number contains only 0s and 1s. if that is not the case, your program should print a message that
  61. math

    the first number of a sequence is 200. every number of the sequence after the first is 100 less than twice the preceding number. what is the 5th number of the sequence
  62. MATH

    the first number of a sequence is 200. every number of the sequence after the first is 100 less than twice the preceding number. what is the 5th number of the sequence
  63. Quick math help

    Find the sum of the first 10 positive integers Is it 110? Which term of the arithmetic sequence is 25? -2,1,4,... Is it 70? Which term of the arithmetic sequence is177? 2,9,16,... Is it 1234? Find the sum of the first 8 positive odd integers. Is it 64?
  64. Calculus

    Explain, using the theorems, why the function is continuous at every number in its domain. F(x)= 2x^2-x-3 / x^2 +9 A) F(x) is a polynomial, so it is continuous at every number in its domain. B) F(x) is a rational function, so it is continuous at every
  65. Emily

    1.)Dylan has $2.30 and dimes and nickels The number of dimes exceeds the number of Nichols by five find the number he has a each. 2.) A coin purse contained $4.70 in Nickels and quarters there are 30 Coins in all how many of each kind of there. 3.)
  66. math

    I am doing something wrong when I work this question. Can someone show me the steps. I have the answer. x<5.189 The sum of the costs in parts a and c is less than $120. Write and solve an inequality to determine the possiblities for the number of
  67. A class has the same number of girls and boys only

    Aclass has the same number of girls and boys only eight boys were absent on aparticular day and the number of girls was doublethe number of boys what is the number of boysand girls ?
  68. math

    my number is a multiple of 5, but doesnt end in 5, the prime factorization of my number is a string three numbers, two of the numbers in the prime factorization are the same, my number is bigger than the seventh square number
  69. 6th grade math

    A single, standard number cube is tossed. What is the probability of getting a number greater than 3? A. 2/3 B. 1/3 C. 1/6 D. 1/2 I think that it's D because a standard number cube has 6 numbers, and if we could get a number greater than 3, three is half
  70. ALGEBRA

    can you help me with this. d don't get it at all :( let n be the number used for the given number puzzle. use algebra to show how the puzzle works. 1. pick a number 2. subtract 9 3. multiply by 6 4. divide by 3 5. add 18 6. subtract twice your original
  71. math 3

    is it possible for a number to be a rational number that is not an integer but is a whole number? explain
  72. Math

    Find a number such that one-half of the number is 12 less than two-thirds of the number
  73. math

    One number is greater than another by 40/11. If the smaller number is less than 47/22 by 1/2, find the number.
  74. algebra

    One sixth of a certain number and three-eighths of the same number total 13. What is the number
  75. I can solving my problem

    I'm a number grater than 45 but less than 90. I am an even number. i have 7 sets of the 16 ones. what number am I?
  76. math

    A number divisible by another number when the ________ after division by that number is 0?
  77. math

    The product of a number and 2 has the same value as that number minus 2. What is that number? not just an answer. A.-4 B-2 C.-1 D.0 E.2
  78. 7th grademath

    a number plus half the number is 33 find the number
  79. albgrea

    what three times a number is subtracted from 12, the result is 4 plus the number. what is the number?
  80. algebra

    Eight times the opposite of a number is 36 less than the product of 4 and the number. What is the number?
  81. Math

    I don't know how to answer this. If 10% of a number is 2 less than 20% of the same number, then 80% of the number equals_______.
  82. Math

    The recipocal of 4 less than a number is three times the reciprocal of the same number.What is the number?
  83. math

    what is three less than 11 times a number is the same as the number decreased by 13. find the number
  84. Math

    Greatest number round number 30000 least number
  85. Math

    A number between 10 and 20. It rounds to 20. One of this number's digits is 5 greater than the other. What number is it?
  86. math

    number Puzzles: My number is less than 200. My number is less than 400.
  87. math

    30 is added to 1/3 of a number. the results is double the number. What is the number?
  88. math

    3 times a number is greater than half of the number by 50. What is the number?
  89. Math

    one less than a positive number times three more than that number is 32. Find the number
  90. Macroeconomics

    (Simple Spending Multiplier) Suppose that the MPC is 0.8, while investment, government purchases, and net exports sum to $500 billion. Suppose also that the government budget is in balance. a. What is the sum of saving and net taxes when desired spending
  91. algebra

    please write an explaination why (x^3)(x^4) is not x^12. I am confused thank you. it is not the answer because, first of all, try replacing x with another number, in this case, let's say two. (2^3)(2^4)= 128, and if you try 2^12, you do not get 128,
  92. math

    A game is defined by the rules that two dice are rolled and the  player wins varying amounts depending on the sum of the two dice rolled based  on the following table: Sum 2 3 4 5 6 7 8 9 10 11 12 Winnings $10 $9 $8 $7 $6 $5
  93. math

    When Professor Sum was asked by Mr. Little how many students were in his classes, he answered, “All of them study either languages, physics, or not at all. One-half of them study languages only, one-fourth of them study French, one-seventh of them study
  94. Math

    I'm not sure how to do this question 7. The growth of bacteria in culture can be described by the equation N1 = N0e' where N is the number of bactena at any time t, No is the initial number of bacteria, and k is a constant. The time taken for growth to
  95. algebra

    i'm really confused about if 0.123333... is A) rational number B) irrational number C)integer,rational number D)whole number, integer,rational number can somebody help me please thank you
  96. Math

    The sum of the first two terms of an arithmetic series is 15 and the sum of the next two terms is 43. What are the first four terms of the series?
  97. math

    the sum of five consecutive numbers is 28 more than the sum of the third and the fifth numbers.find the consecutive numbers
  98. algebra 2

    1. solve: x^3 =4x 2. solve: (x-3)^2 = -4 3. solve: (6 +5i) ^2 4.Two integers have a sum of -4 The sum of their squares is 40. What are the two integers?
  99. polynominals

    The number of trout in America, since 1970, is given by the following: y = x^2 + 3x + 2, where x is the number of years and y is the number of trout in millions. What is the number of trout in the years 1975, 1980, and 1985?
  100. math help

    the sum of the first two terms in a geometric series is 12. the sum of the first three terms of the same series is 62. determine the first four terms of the series.