Tanya

1. Trig

Tan theta / 1- tan theta -cot theta /1-cot theta =cos theta + sin theta/cos theta -sin theta
2. History

Critically access Robespierre's contributions to the revolution
3. Math

a rectangle of board measures 21 m by 70 cm. Circular plates are to be cut from the board of diameter 14 cm. how many plates and board is left
4. Maths

A survey conducted with 30 students revealed that:20 has cell phone 16 has tsblets 4 has neither 2x has both...calculate the value of x
5. Math

An alloy is made up of 25% copper, 30% iron an rest being zinc. Find the mass of zinc in 720 gm of the alloy
6. Math

Kareena got 60% marks in English, 75% in hindi and 130 in maths. The max marks in each of subject are 150,200and 150. Fknd her aggregate marks.
7. Math

A man takes commission at the rate of 2% on first 50,000, 7% on next 50,000 and 0.5% on remaining price. Find bis commission on the car that has been silf for 2,38,000.
8. Math

Kareena got 60% marks in English, 75% in hindi and 130 in maths. The max marks in each of subject are 150,200and 150. Find her aggregate marks.
9. math

A person that is 1.6 m tall casts a 4 m shadow. At the same time, a nearby tree casts a 12 m shadow. What is the height of the tree to the nearest tenth of a metre?
10. Science

water is flowing through a horizontal pipe of varying cross section at any two places the diameters of the tube are 4cm and 2cm if the pressure difference between these two places be equal to 4.5cm then determine the rate of flow of water in the tube
11. financial management

Barclays bank has agreed to give Dumisani a loan of \$250 000 on the following conditions: a) 16% interest rate compounded monthly b) Dumisani will have to pay back 12 equal installments each at the end of each quarter. Determine the value of each
12. Msth

4(y+1)+3(y-6)+14=-28
13. Math

2(3c to the 2nd power+ c +-2 Please check 6c to the 4th power+c squared + -4
14. Math

Please check Simplify 7t+3+t+9=8t+12 Simplify m-2-4m-5=-3m+7 Solve 90=5t+t 90=6t t=15
15. HISTORY

Greek educators, religious reformers,scientist of intellectual revolution, political philosophers constructed the door through when the pilgrims entered the new world when they arrived. [Critically analyze] who are the Greek educators? who are the
16. statistics (math)

of college students 45% are women 8% have a GED. suppose a student is selected at random. Given that the selected employees is a woman. what is the probability that she has a GED
17. Statistic math

student is graduating from their university and has applied to jobs at company A and B. The student thinks they have a 40 % chance of a receiving an offer from company A and a 50 % chance of receiving an offer from company B. If the student receives an
18. statistics

In a recent​ season, the population standard deviation of the yards per carry for all running backs was 1.241.24. The yards per carry of 25 randomly selected running backs are shown below. Assume the yards per carry are normally distributed. 1.81.8
19. Algebra 2

The lenths of the side of a triangle are x+4 units, x units, and x+1 units. Express the perimeter of the triangle as a polynomial in standard form.
20. chemistry

name three characteristics of nonmetals
21. math

charlene takes the bus to work in the morning, then walks home for lunch, walks back to work, and finally walks home in the evening. The distance one way is 600 meters. How far does she walk each day between home and work? 1.2 kilometers 1.8 kilometers 180
22. math

the distance between new york city and boston is 189.9 miles as the crow flies. how far is it in kilometers? 117.7 kilometers 305.7 kilometers 417.8 kilometers 1,899 kilometers
23. math

how do you convert miles to feet in the u.s. customary sysyem? multiply by 12 divide by 12 multiply by 5,280 divide by 5,280
24. Math

Shana has written a 3 digit number in which the digits are all different. The sum of the digit of her number is 14. And the product of her number is 54. The digits are in order from greatest to least. What are her numbers?
25. Math

Shana has written a 3 digit number in which the digits are all different. The sum of the digit of her number is 14. And the product of her number is 54. The digits are in order from greatest to least. What are her numbers?
26. afrikaans (AFK503/101)

Hi there, can anyone pls help me with AFK1503/101 - 2015. I am seeking an English version of this assignment pls, is there an English one available? if there is pls provide me with a website address to get access. Thank you. Tanya
27. math problems

shelia works at Bills Bargin. She earns \$350 per week plus 10% of all sales. What is her commission for the week, if she sold \$2490 worth of goods?
28. chemistry

The edge length of face centered unit cubic cell is 508pm.if the radius of the cation is 110 pm,the radius of anion is
29. history

the reign of terror was a necessary evil discuss
30. chemistry

CHEMICAL KINETICS The rate of reaction 2N₂O5->4NO₂+O₂ can be written in three ways -d[N₂O5]/dt= k[N₂O5] d[NO₂]/dt= k'[N₂O5] d[O₂]/dt =k"[N₂O5] The relationship between k and k' and between k and k" are ?
31. MATH

0.4771=x/2.303*8.14[50/323*373 calc.-x?
32. maths

0.4771=x/2.303*8.14[50/323*373 calc.-x?
33. chemistry

In a zero order reaction ,20% of the reaction complete in 10s .How much time it will take to complete 50% of the reaction?
34. chemistry

A|A+3(0.1)||B+2(0.01m)|B GIVEN E°A|A+3=0.75v E°B|B+2=0.45v
35. Chemistry

Hydrazene can be used in fuel cell N2H4(aq)+o2(g)->N2(g)+2H2O(l) IfΔG°for this reaction is -600kj what will be the E°for the cell?
36. Physics Help Please --- Telescope

An astronomical refracting telescope is made from two lenses. the objective lens has a focal length of 114 cm, and the eyepiece lens has a focal length of 17 cm. a) What is the total length of the telescope? b) What is the angular magnification of the
37. Physics Help Please --- Urgent

A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an insect is now placed 16 cm from this lens, how far FROM THE INSECT will its image be formed? A) 64 cm B) 72 cm C) 32 cm D) 96 cm E) 48 cm
38. PHYSICS

An object of mass M is divided into two parts ,which are placed at distance d.if gravitational force of attraction is maximum between parts,then find the ratio of mass of both parts
39. Chemistry

the rate of diffusion of a gas having molecular weight just double of hydrogen gas is 30 ml/s.the rate of diffusion of hydrogen gas will be
40. CHEMISTRY

Two gases A and B having the same volume diffuse through a porous in 20 and 10 seconds respectively .The molecular mass of A is 49u.Molecular mass of B will be
41. Chemistry

0.24g of a volatile substance,upon vaporisation,gives 45ml vapour at NTP what will be the vapour density of the substance?
42. CHEMISTRY

The average kinetic energy of an ideal gas,per molecule in S.I units at 25°C will be
43. CHEMISTRY

At 25°C and 730 mm pressure,380 ml of dry oxygen was collected.If the temperature is constant ,what volume will the oxygen occupy at 760 mm pressure ? ANSWER- 365ml
44. CHEMISTRY

The pressure exerted by 6.0g of methane gas in a 0.03m3 vessel at 129degreeC is.
45. CHEMISTRY

A gaseous mixture was prepared by taking equal mole of CO and N2 .if the total pressure of the mixture was found 1 atmosphere ,the partial pressure of nitrogen (N2) in the mixture is.
46. math

The scale of the map is missing.The actual distance from Liberty to West Quall is 72 miles,and it is 6 inches on the map. (A)What is the scale of the map? (B)Foston is between Liberty and West Quall and is 4 inches from Liberty on the map.How far is Foston
47. AP Physics

A block of mass 80.4 kg is sliding on a ramp. The angle of elevation of the ramp is 45 degrees. The coefficient of friction is 0.43. Use g=9.8. Give your answer to at least 2 decimal places. Assume that down the ramp is the positive direction.
48. Physics Help Urgent

A ball is thrown straight up into the air with a velocity of 12 m/s. Draw a motion diagram for the ball and then give as much quantities information as you can about the motion. I know you guys can draw anything on this platform. But can you lead me to
49. Organic-Chem Help

You wish to purify by distillation a material that has a boiling point of 205 C and reacts with air but this material will decompose if heated above 150 C. How would you set up the system to distill this material? Show steps Pleaseeeee!!!!!!!!!! Thank
50. American national government

In brown v board of education Yvette supreme court overturned purest v Ferguson because it concluded that
51. computers

Th e No Interest Credit Company provides zero-interest loans to customers. Design an application that gets customer account data, including an account number, customer name, and balance due. Output the account number and name, then output the customer’s
52. calculus help

Evaluate!!!! integral -10 to 10 ((2e^x)/(sinhx+coshx))dx Thanks!

Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 3 s. The maximum rate of air flow into the lungs is about 0.3 L/s. This explains, in part, why the function f(t) = (3/10)sin(2πt/3) has
54. CALCULUS

A plane, flying horizontally at an altitude of 1 km and a speed of 500 km/hr, passes directly over a radar station. find the rate in km/hr at which the distance from the plane to the station is changing when it is 2 km away from the radar station. Hint:
55. Calculus

a) Estimate the area under the graph of f(x)=7+4x^2 from x=-1 to x=2 using three rectangles and right endpoints. R3= ???? Then improve your estimate by using six rectangles. R6= ????? Sketch the curve and the approximating rectangles for R3. Sketch the
56. CHEMISTRY HELP !!!!

NH4CL , ZNCL2 , KAL(SO4)2 FIND THE FOLLOWING NET IONIC EQUATION FOR HYDROLYSIS EXPRESSION FOR EQUILIBRIUM CONSTANT (KA OR KB) VALUE THANK YOU SO MUCH!!!

Find the equation in slope intercept form of the tangent line and the normal line to the curve x^2+4xy+y^2=13 at the point.(2,1). show steps please!!! thank you!

If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a proper fraction that is completely simplified as much as possible.

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x Y1= I

Find the absolute maximum and absolute minimum values of f on the given interval. f(t) = (t square root of (64 − t^2)) ,[−1,8]
61. math

Dana rode her bicycle 600 miles one summer before she had to replace the tire on her front wheel. The diameter of the front wheel is 24 inches. What is the best estimate of the number of revolutions made by the tire before it had to be replaced?

In a murder investigation, the temperature of the corpse was 32.5 C at 1:30pm and 30.3 C an hour later. Normal body temperature is 37.0 C and the temperature of the surrounding was 20.0 C. When did the murder take place? PLEASE SHOW STEP BY STEP
63. math

A water heater has a diameter of 18 inches. It sits in a drain pan that has a diameter of 22 inches and a height of 2 inches, as modeled in the diagram below. Water that leaks out of the water heater sits in the drain pan. Which of the following is closest
64. Calculus Help and Check

Find dy/dx by implicit differentiation. x^5(x + y) = y^2(9x − y) this is what i've got so far but I don't think it is the right answer. y'= 9y^2-6x^5-5x^3y/x^5+9y^2-18xy
65. Science

Intrinsic control of heartbeat rate involves what mechanism(s)? a) The AV node initiates heartbeat although the SA node can generate a slower beat rate. b) The atrioventricular bundle initiates signals that travel to the Purkinje fibers. c) The SA node
66. Physics

Two spheres with masses of 5.00 g and 10. kg respectively are .500 m apart. calculate the force of attraction between them.
67. Medical Billing and Coding

Had to develop a paragraph using clear, varied sentences containing concrete words and transitions or connectives to create a logical flow. Need assistance in the following paragraph that describes on particular experience I had that inspired you or guided
68. Math

(2-4i)-(-4+i)=
69. finance

can someone help me with this problem for this problem you will use 0.02/365 for your interest. You deposit \$1000 at 2% for 20 years, compounded daily.
70. finance

You deposit \$1000 at 2% for 20 years, compounded annually. What's the future value?
71. finance

You deposit \$1000 at 2% for 20 years, compounded annually. What's the future value?
72. math

i am a 2 digit decimal , the sum of my digit is 12. if you divide me by a certain number the quotient is 37. who am i?
73. pre cal

Solve G(x) for the given domain. G(x) = 3x 2 - 2x - 1 G(6) =
74. Physics

Which of the following is the correct relationship between the electric field strength and the potential difference?
75. Algebra

Solve for x. Round to the nearest hundredth. ln(x) = -1.8 x =
76. math

Find the general solution of cos2x + 3 sin x =2
77. math

show that 1-sin x/cosx + cosx/1-sin x = 2 sec x
78. ,math

show that sec theta(cosec theta) - cot theta = tan theta
79. Algebra

Write the logarithm in expanded form. log2(y^5)
80. Algebra

Solve for x. Round to the nearest hundredth. ln x = − 4/9 x =
81. Algebra

Evaluate the following function at the indicated values. H(x) = 2x (a) H(-3) = (b) H(0) = (c) H(5) =
82. Algebra

Given f(x)=x^2 + x + 4 and h(x)= 3x +2, evaluate the composite function. f [h(x)]
83. Algebra

Given h(x)= 2x + 2 and f(x)=1/2 x + 4, evaluate the composite function. h[f(x)]
84. Algebra

Given f(x) = 2x − 1 and g(x) = 4x − 4, evaluate the composite function. g[f(x)]
85. Algebra

Given f(x)=2x^2 + 9x − 7and g(x)=2x −6, find the following. (If an answer is undefined, enter UNDEFINED.) f(−2) − g(−2)
86. Algebra

Given f(x)= 2x^2 – 1 and g(x) = –2x + 1, find the following. f(3) − g(3)
87. English Composition

I know that mood and tone are different, but is mood considered an element of literature?
88. chemistry

how much heat is required to vaporize 343g of liquid ethanol at its boiling point?
89. science

In the laboratory small zircon crystals were separated from granite (K). Isotopic analysis of these zircon crystals gives a 207Pb/235U ratio of 0.45. the half-life of 235U (7.04 × 108 years), estimate the age of the granite in Ma to two significant
90. Chemistry

You are using concentrated hydrochloric acid solution (12.0 M)to make 445.0 ml of a 5.85 M solution. Calculate the number of milliliters of concentrated HCl required to make the solution.
91. math

Correct the right hand side of the following expressions. 5+ x = 5 + X 2 6 2 + 6 6x + 5 = x + 5 6 1 1 1 y + c = y + c
92. Math

Jake ate seven times more jelly beans as Sam. Together they ate 128 jelly beans. How many jelly beans did each person eat?
93. Finance

An investment pays 9 percent interest compounded semi-annually. What is the effective annual interest rate?

f/-11 < 9
95. physics

an elevator motor provides 45 W of power while lifting a 2000 kg elevator 35 m. if the elevator contains six passengers of the same mass and it takes 20.0 to accomplish this task, determine pass of each passenger.
96. american government

Which of the following is characteristic of a capitalist economic system? a. free enterprise b.self-reliance c.private property d.individualism e.all of the answers are correct
97. language arts

“In the snow” is repeated three times in “Scott’s Goodbye.” What meaning might the writer have hoped to convey by repeating this phrase?
98. Calculus!

A 16 ft. ladder leans against a wall, with the top being 12 ft. from the wall when time t=0. The top is sliding down at a constant rate of 4 ft./second. Given that the top of the ladder touches the ground at 3 seconds, what is the velocity of the bottom of
99. MATH,statistics

At a recent scotch-tasting party, 20 faculty members and their (opposite sex) spouses were guzzling it back pretty well. One person quite correctly noticed that the women seemed to be drinking more than the men. If the mean number of drinks had by the men
100. statistics

If other factors are held constant, how does increasing the number of scores in each sample affect the value of the independent measures t statistic and the likelihood of rejecting the null hypothesis?

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