1. Arts

1. which of the following did the development of linear perspective allow artists to do? a. show human anatomy more accurately* b. paint three dimensional images on a flat surface c. create more exact technical drawings d. build domes with precise

2. probability theory

Let X, Y, Z, be independent discrete random variables. Let A= X(Y+Z) and B= XY With A, B, X, defined as before, determine wheter the folllowing statements are true or false. 1. A and B are independent 2. A and B are conditionally independent, given X = 0.

3. math

Explain the steps to solve this problem 0.000027 divided by 0.000009

4. history

Which document enumerates the limitations of the federal government and the personal freedoms of United States citizens? Declaration of Independence Bill of Rights Articles of Confederation Albany Plan of Union B?

5. Algebra

How many ounces of a 26% alcohol solution and a 32% alcohol solution must be combined to obtain 34 ounces of a 29% solution?

6. Maths

Find the zeros of the polynomial f(x)=2x3-7x2-3x+18

7. Science -

"To lift an object weighing 12,000N, how much force is needed on a piston with an area of 0.060 m^2 if the platform being lifted has an area of 3.0 m^2?"

8. Physics

A piston in a car engine has a mass of 0.75kg and moves with motion which is approximately simple harmonic. If the amplitude of this oscillation is 10 cm and the maximum safe operating speed of the engine is 6000 revolutions per minute, calculate: a)

9. Physics

An experiment is carried out to measure the spring constant of a spring. A mass of 500 g is suspended on the spring. It is pulled down a small distance and the time for 20 oscillations is measured to be 34 s. a) explain why the mass performs simple

10. linear algebra

The reduced row-echelon form of the augmented matrix for a system of linear equations with variables x1, ... , x5 is given below. Determine the solutions for the system and enter them below. 1 0 0 -3 -3 = 4 0 1 0 -2 -5 =-1 0 0 0 0 0 = 0 If the system has

11. Statistics

How many different hands of 4 cards can be selected from a standard 52 card deck?

12. algebra

In the expression, a,b,c , and d are non-zero constants and ad= bc . If ac = 18 and bd = 50, what is the value of the coefficient of the xy term when the expression is multiplied out and like terms collected? (ax+by)(cx-dy)

13. math

Find an equation of the tangent line to the graph of f(x)=x+3/x^2+2 at x=1 A.5x+9y=17 B.5x+3y=9 C.9y-5x=7 D.5x+9y=7

14. Physics

A spring 20 cm long is stretched to 25 m by a load of 50 N. What will be its length when stretched by 100 N, assuming that the elastic limit is not reached?

15. Gen Math

Find the value of x 1.) 1/x = 2/3x-1 2.) x-2/2x+4 = 1/5 3.) 1/x + 1/2x = 2/3

16. physics

In the figure, a 5.40 kg block is sent sliding up a plane inclined at θ = 37.0° while a horizontal force Upper F Overscript right-arrow EndScripts of magnitude 50.0 N acts on it. The coefficient of kinetic friction between block and plane is 0.300. What

17. Physics

A cannon is fired with a muzzle velocity of 24.6 m/s with the cannon barrel at an angle of 50.0 degrees with the horizontal. Find the horizontal distance that the cannonball will travel. The answer is supposed to be 60.8 m, but I keep getting 31.3 m. How

18. science

Oxygen is prepared by heating KClO3. (i) What weight of O2 is obtained from 3.00 g KClO3? (ii) What is the volume of O2, measured at standard conditions? (iii) What volume does the O2 occupy if collected over water at 0.961 atm

19. Algebra II

A rectangular picture has a length that is twice its width. The picture has an area of 162 square inches. Fidn the dimensions of the picture.

20. Math

What is the perimeter & area of the sector with 100 degrees angle and radius of 20cm?

21. Statistics

A baseball coach has a team of 22 players .In how many ways can be select a lineup of 9 players to start the game. ( order matters)

22. Calculus

I am trying to find the integral of e^(6x)sin(7x). Apparently, the answer is (6e^(6x)sin(7x) - 7e^(6x)cos(7x))/85) + C and achieving the answer is mostly understandable since it involves integrating the function in parts... that is until I get to this

23. Maths

The remainder when the polynomial f(x)=2x3+px2+qx+18 is divided by (x-1) is 10, when it is divided by (x+1) the remainder is R find (1) The values of p and q (2) The zeros of f(x)

24. Math

The product of two positive numbers is 35 and their difference is 2. What is the sum of the two numbers?

25. science

i was wondering what the balance equation this would be NaOH + H3PO4 --> Na3PO4 + H-OH (H20) thank you

26. maths

The remainder when the polynomial f(x)=2x3+px2+qx+18 is divided by (x-1) is 10, when is divided by (x+1) the remainder is 12, find (a) The values of p and q (b) The zeros of f(x)

27. Statistics

How many two-person committees can be selected from a set of 8 people. 8nCr2=28 I need a reason why it is 28 when you input it into the calculator

28. psychology

What are negatives and positives of group think?

29. physics

A plane leaves toronto and flies with an airspeed of 360.0 km/h always pointing east. A wind is blowing at 65.0 km/h [S 35.0 degrees E]. What is the plane's velocity relative to the ground? What is the plane's displacement from Toronto after flying for 2.4

30. Algebra

The members of set A are the integer solutions of the inequality 2x−5≤11 and the members of set B are the integer solutions of the inequality −2x+7≤−9. What is one member of the intersection of A and B?

31. history

“To understand political power right, and derive it from its original, we must consider, what state all men are naturally in, and that is, a state of perfect freedom to order their actions, and dispose of their possessions and persons, as they think fit,

32. English

I appreciate your help. One more time, I posted the questions concerning the use of prepositions. Would you check the questions? Thank you. 1. We ate turkey on Thanksgiving Day. 2. We ate turkey at Thanksgiving. 3. We ate turkey on Thanksgiving. [What

33. biology

Does the affinity of myoglobin for oxygen change when oxygen concentration changes? Im not really sure how to answer this. I know that myoglobin has very strong affinity for oxygen so once myoglobin is in the presence of oxygen it will react right away

34. Math

4. The animal shelter rescued 40 cats and dogs today. If 12 of them were cats, what percent of them were dogs? Should I solve by subtracting 40-12 to get the number of dogs or solve using the cats and then subtracting that from 100? 40-12 = 28 dogs 28/40 =

35. Physics

A mystery planet in another part of the galaxy has an acceleration due to gravity of 5.00 m/s^2. If the radius of this planet is 2.00 x 10^6 m, what is the mass of the mystery planet?

36. English

1. He caught a big fish, but he put it back. 2. He caught a big fish, but he turn it back. 3. He caught a big fish, but he returned it. 4. He caught a big fish, but he returned it back. 5. He caught a big fish, but he released it. 6. He caught a big fish,

37. Algebra II

Zach borrowed \$50,000 to buy a car, put a down payment on a house, and pay for student loans. Some of the money was borrowed at 5%, some at 6% and some at 7%. How much was borrowed at each rate if the annual interest owed was \$3,150 and the amount borrowed

38. Science

Two trucks collide together and having two mass and two velocity, How can I calculate the direction of velocity two trucks after impact?

39. sociology

Why did Max Weber fear bureaucracy? He thought it would discourage the growth of capitalism. Bureaucracy dominated individuals with large, impersonal structures. Bureaucracy increased mental health conditions among office workers. Discipline and hard work

40. English

1. What did you do on Easter Day? 2. What did you do at Easter? 3. What did you do on Easter? [Don'w we use #3?] 4. We ate turkey on Thanksgiving Day. 5. We ate turkey at Thanksgiving. 6. We ate turkey on Thanksgiving. [What about these sentences? Which

41. math

the denominator of a fraction exceeds the numerator by 1. if 2 is to taken from each the sum of the reciprocal of the new fraction and 4 times the original fraction is 5. find the original fraction

42. psychology

The use of blind or double-blind investigators in a study is done to avoid: sampling error. sample bias. uncontrollable variables. researcher bias. random error.

43. English

Write : - 2 x a memo(memorandum) 250 - 300 words (3 paragraphs) - a notice 200 - 300 words ( 4 paragraphs). English level : B1/ C1 Details will be attached.

44. psychology

the use of blind or double-blind investigators in a study is done to avoid: sampling error. sample bias. uncontrollable variables. researcher bias. random error. i think it is researcher bias

45. algebra

Solve the following system of linear equations: 2x2+4x3+2x4 = −5 5x2+10x3+5x4 = −15 x1+2x2+2x3−3x4 =3 If the system has no solution, demonstrate this by giving a row-echelon form of the augmented matrix for the system.

46. Math

SHOW THAT LINES (x-5)/-2 = (y+3)/4 = (z-1)/6 = t AND (x+2)/4 = (y-1)/-8 = (z+6)/-12 = t ARE PARALLEL.

47. Maths

Generate a few comporite numbers by product of two or more natural numbers.

48. English

Could someone please check my answer at the bottom and let me know if I did this correctly? If I didn't would you please give me some suggestions? I have 6 of these that I have to re-write. Thank you, Faye In this assignment, you will edit and revise

49. physics

a rope attached to a sledge make an angle of 40% with the ground calculate the tension in rope required to produce a horizontal component of 100N

50. Math

x + 9 ------ = 2 13 Confused...?

51. Physics

Calculate the speed of light in ethyl alcohol (n=1.52).

52. Engineering

Three CSTRs are used in series. The second reactor has a volume twice that of the first and third reactors. The influent flow has a concentration of 150 mg/l of A, and the flowrate is 380 l/min. The reaction is first order, the rate equation is -dCa/dt=

53. maths

Find the zeros of the polynomial f(x)=2x3-7x2-3x+18

55. sociology

According to Piaget, children develop through a series of stages that: lead all children to the final and most advanced stages of logical thinking. are unpredictable and unique to each child. are unpredictable, but nevertheless lead to the most advanced

56. psychology

According to Piaget, children develop through a series of stages that: 1. lead all children to the final and most advanced stages of logical thinking. 2. are unpredictable and unique to each child. 3. are unpredictable, but nevertheless lead to the most

57. calculus

Find the value of (f o g)' at x = 4 when f(u)= cos(piu/24) and u=g(x)=6sqrt(x)

58. algebra

Suppose that you have a supply of a 20% solution of alcohol and a 80% solution of alcohol. How many quarts of each should be mixed to produce 60 quarts that is 65% alcohol?

59. Math

The function f(x)=x^2-ax if x is less than or equal to 1 and f(x)=ax+b if x is greater than 1 where a and b are constants. If f is differentiable at x=1 then a+b= A.-3 B.-2 C.0 D.2