winston

Most popular questions and responses by winston
1. calculus

If x2+xy=10, then when x=2, dy/dx=?

2. Math

A pig farmer wants to enclose a rectangular area and then divide it into three pens with fencing parallel to one side of the rectangle (see the figure below). There are 940 feet of fencing available to complete the job. What is the largest possible total

3. Statistics

You are interested in estimating the mean of a population. you plan to take a random sample from the population and use the samples mean as an estimate of population mean. Assuming that the population from which you select your sample is normal, which of

4. MATH

In a fraternity with 38 members , 18 take math, 5 take both math and literature and 8 take neither math or literature. how many take literature but not math? I came up with 16 is that correct or am i lost ?

5. Computer Architecture

home / study / engineering / computer science / computer science questions and answers / 4.7 problems in this exercise assume that the logic blocks used to implement a processor’s ... Question: 4.7 Problems in this exercise assume that the logic blocks

6. MATH

a crew consists of 1 apprentice, 1 journeyman and 1 master carpenter. The crew receives a check for \$5950 for a job. A journeyman makes 300% of what a apprentice makes, and a master makes 150% of what journeyman makes how much do each person on the crew

7. math

the gauss's approach to find the following 1+2+3+4+... 99 1+3+5+7+...101

8. Chemistry

electromagnetic radiation of which frequency (in Hz) can be emitted by the hydrogen atom upon transition of an electron from n= 6 to n= 2 according to the bohr model.

9. Math

Gary walked 1 1/2 km to school, then 750 m to his job, then 1 km home. How many kilometres did he walk altogether?

10. Linear Algebra

Let T be a linear operator on R2 defined as follows on the standard basis of R2. T(1, 0) = (3, 2), T(0, 1) = (−1, 4). Find T(9, 4).

11. physical science

find the mass of sodium chloride formed when 6.9g of sodium burns in a gas jar filled with chlorine gas.

12. help on calculus

A spherical balloon is being filled with air in such a way that its radius is increasing at a rate of 2 centimeters per second. At what rate is the volume of the balloon changing at the instant when its surface has an area of 4 pi or 12.56637061 square

13. Math

A shirt button gas a mass of 400 mg. A factory produces a tonne of these buttons in a year. How many buttons does it produce.

Identify the gerund and classify whether it is used as a subject, direct object, indirect object, predicate noun, appositive, and object preposition.  1. He left without saying goodbye.  2. Studying is investing for the future.  3. Making a major

Identify the gerund and classify whether it is used as a subject, direct object, indirect object, predicate noun, appositive, and object preposition. 1. He left without saying goodbye. 2. Studying is investing for the future. 3. Making a major decision is

16. Math

using gauess approach 1+2+3+4+... +99 1+3+5+7+...+101

17. math

slove for ^x x^2-3x-18=0

18. Theory of Computing

1. Prove by induction that b - a | b^n - a^n for all n >= 1.

19. Math

What criterias do two graphs have to meet in order to be isomorphic? I know they must have the same number of vertices and edges. Do they both have to be bipartite/non-bipartite?

20. Math

Sorry posted the wrong question earlier. Let A and B be sets. Show that A \ (A \ B) ⊆ B.

21. Math

What is the value of x after these statements if the starting value of x is 3. (a) If x^2 = 5^x then x := 25^x. (b) If x^2 > x and x^3 < 4x^2 then x := x+ 2. (c) If 4^x < x^4 or x^5 > 5^x then x := x^2. (d) If 5^x > 2^x xor x^2 < 11 then x := x + 8. (e) If

22. Dylan

Find two distinct intervals where f(x) = x^7 + 3x^2 - 11x + 5 has at least one root.

23. math help

given the function F described by f(x)--x-6. find f(-7)

24. math

find the prime factorization of 35^3 *55*9^11

25. math

sub 780 for x -2,5x^2 +2825x -115,812.5

26. math

substitute 400 for x 0.005x^2-45x+12,000

27. MATH

Use your calculator to compute the actual roots. Use the Quadratic Formula to solve x2 – 4x – 8 = 0.

x(6x+1)

y=9(7+4)^2+9

30. math

simplfy 3 root 3/8

31. College Mathematics

The mass of a large stone block was determined to be 3361 kg. What is the weight of this stone in tons? A. 3.7 B. 1680.5 C. 1512.45 D. 3361

32. Math

When the moon is at its zenith at a point A on earth, it is observed to be at the horizon from point B. Points A and B are 6155 mi apart and the radius of the earth is 3960mi. Estimate the distance of the moon. Thanks!

33. Theory of Computing

Prove the following identities in a Kleene algebra. a) (a + bb + ba(b + aa)* ab)* = (a + b(ab*a)* b)* b) a* + a*b(ba*b +ab*a)* ba* = (a + b(ab*a)* b)*

34. Math

Prove that if A∩B = A∪B then A=B. Having troubles figuring this one out.

35. Math

What criterias do two graphs have to meet in order to be isomorphic? I know they must have the same number of vertices and edges. Do they both have to be bipartite/non-bipartite?

36. Math

Decide if the following pair of functions are of the same order. The functions f(x) and g(x) are of the same order if f(x) is O(g(x)) and f(x) is Ω(g(x). (a) f(x) = x^2 - 7 and g(x) = x^2 + 7

37. Math

Decide if the following pair of functions are of the same order. (a) f(x) = x^2 - 7 and g(x) = x^2 + 7 I found this example solution online: a). f(x) = 3x + 7 and g(x) = x x

38. Math

Decide if the following pair of functions are of the same order. (a) f(x) = x^2 - 7 and g(x) = x^2 + 7 I found this example solution online: a). f(x) = 3x + 7 and g(x) = x x

39. Math

Decide if the following pair of functions are of the same order. (a) f(x) = x^2 - 7 and g(x) = x^2 + 7

40. Math

Find the smallest integer value of N such that f(x)=O(x^N). a) f(x) = x^7 - 150x^6 + 3x^3 + 111 b) f(x) = (x^3 + 2x^2) / (x^4 + x^2 + 1) c) f(x) = ⌈x⌉ d) f(x) = ⌊x⌋

41. Math

Find the smallest integer value of N such that f(x)=O(x^N). a) f(x) = x^7 - 150x^6 + 3x^3 + 111 b) f(x) = (x^3 + 2x^2) / (x^4 + x^2 + 1) c) f(x) = ⌈x⌉ d) f(x) = ⌊x⌋

42. Math

Let A and B be sets. Show that A\B(A\B) ⊆ B.

43. Math

Let A and B be sets. Show that A\B(A\B) ⊆ B.

44. Math

Let A and B be sets. Show that A\B(A\B) ⊆ B.

45. Math

Suppose that the domain of discourse is the set {-2, -1, 0, 1, 2}. Express the following statements without using quantifiers, using only the connectives ¬, V, Λ. (a) ∃x P(x) (b) ∀x P(x) (c) ∃ ¬P(x) (d) ∀ ¬P(x) (e) ¬∃ P(x) (f) ¬∀ P(x)

46. Math

Suppose that the domain of discourse is the set {-2, -1, 0, 1, 2}. Express the following statements without using quantifiers, using only the connectives ¬, V, Λ. (a) ∃x P(x) (b) ∀x P(x) (c) ∃ ¬P(x) (d) ∀ ¬P(x) (e) ¬∃ P(x) (f) ¬∀ P(x)

47. Math

Suppose that the domain of discourse is the set {-2, -1, 0, 1, 2}. Express the following statements without using quantifiers, using only the connectives ¬, V, Λ. (a) ∃x P(x) (b) ∀x P(x) (c) ∃ ¬P(x) (d) ∀ ¬P(x) (e) ¬∃ P(x) (f) ¬∀ P(x)

48. Math

Consider the propositions p: "You like hockey.", q: "You like the cold.", r: "You play hockey.", and s: "You watch hockey." Write the following propositions using p,q,r and s and logical connectives. (a) You watch hockey but you do not play hockey. (b) If

49. Math

In a 5 km race, Anna swims 450 m, then runs 800 m. She then cycles the rest of the race. How many kilometres does she cycle?

50. Math

Three blocks, each 15 cm thick, are stacked on top of a 1.2 m box. How many metres high is the stack?

51. Math

Pat cuts a 40 cm length off a 3 m ribbon. How many centimetres of ribbon remain?

52. math

Find two distinct intervals where f(x) = x^7 + 3x^2 - 11x + 5 has at least one root.

53. math

Find the value of K such that the map f is continuous at x = -2 if f(x) = { K/((x^2)+4) if -5

54. math

Find all the values of x in the interval [0, 2pi] such that tan^2(x) = 3.

55. math

Knowing that 0

5^6 * 5^3

57. MATH

put in order from largest to smallest 0.54, 0.60686, 0.5065

58. math

the mass of a grain of sand is 8.7*10^-8 write the nurmeral in secentence in standard form.

59. MATH

sub 789 for x -2.5x^2 +2825x-115,812.5 having troubble undeerstanding the process . could someone show me step by step..

60. MATH

sub 789 for x -2.5x^2 +2825x-115,812.5

61. math

subsititude 9 for x 123x^2-492x+813

62. math

select the approximate values of x that are solutions to f(x)=0 where f(x)-5x^2+8+5

63. math

select the approximate values of x that are solutions to f(x)=0, f(x)=-8x^2+2x+4

2x^2+7=9

65. math

x^2+x-18=0 quadratic equation slove for x

66. math

14x^2+19x+32=18

67. math

y=-5x^2+10x-1

68. MATH

NEED SOME HELP 2x^2+5x+3=0

69. math

help pleaSE factorable quadratic equation and solve for the roots: 2x^2 + 13x + 20=0

70. MATH

f(x)= -6x-1 and g(x)=4x^2 select the soultion for (f+g)(x) stuck not sure which answerer is correct -24x^2-1 or -24x^3-4x^2

71. MATH

F(X)=-6-1 AND G(X)=4X^2 WHAT WOULD THE SOLUTION FOR (FG) (X) BE. im stuck between -24x^2-1 or -24x^3-4x^2

72. math

help select the x coordinate of the vertex of paraloa defined by function f(x) -5x^2+7x+3 stck between two options =5/7 or -7/5

73. math

can some one help me ... determind the equation of g(x) that results translating the funtion f(x)=x^2 +19 upward 15 units,,,, the answere im stuck is not sure g(x)=x^2+24 0r is it g(x)=(x+15)^2 +9

74. MATH

HELP PLEASE y = 3x2 + 2x – 1

75. math

im stuck on this problem can some one please explain.. y=9(7+4)^2+9

76. math

i need some help please 2x^2 +5-3

77. math

need help! solve for y 7y^2-52y-32=0

78. math

i need help understanding this problem. 3x^2+4x+2=0

79. math

need some help 2x^2 + 5x -3

80. MATH

help 16^2ã24/6ã56

81. MATH

can somone help! 7ã2*3ã9

82. MATH

help... 5sqrt(8) - 3sqrt(18) + sqrt(3)

84. math

need help 3x^2sqrt(5x) * 3sqart(3x^3)

85. College Mathematics

Solve: 8.5x +8 = 1.3x + 15 A. x = 50.4 B. x = 0.7 C. x = 3.2 D. x = 1.0 Is B the correct answer

86. Personal Finance

You and your spouse both have good retirement plans through work, and both receive social security checks based on your own incomes. If your goal is to maximize the size of your annuity check everymonth which option should you choose? A. Single Life

87. Personal Finance

Social Security is all but: A. financed through working individuals and employers. B. a government benefit paid to elderly and disabled. C. a specific savings plan to which individuals contribute and from which they benefit. Is the Answer C ?

88. Math

estimate the sum or difference by rounding the nearest one 9.87 +4.05

1. Math

Anyway to do it without drawing?

posted on April 17, 2017
2. Math

posted on February 1, 2017
3. Math

I'm not sure. eecs.yorku.ca/course_archive/2015-16/F/1019/assn/A6.pdf Question 30 shows an example but I don't really understand.

posted on January 31, 2017
4. Math

It's actually A \ (A \ B) ⊆ B

posted on January 27, 2017
5. Math

does this look good to you? (a). x = 3 (b). x := 3 + 2 = 5 (c). x := 32 = 9 (d). x := 3 + 8 = 11 (e). x = 3

posted on January 15, 2017
6. Math

Thanks. so what would an example solution for a?

posted on January 15, 2017
7. Math

Just want to make sure what I'm doing is right. Thanks!

posted on January 14, 2017

april 26

posted on September 15, 2016
9. math

Need help computing this limit. lim x->0 x^3 (1 - 5sin(1/x)) I can't figure out how to remove the x.

posted on January 19, 2016

500

posted on October 20, 2015
11. Math

52m

posted on September 3, 2015