Trig check my work please?

89,826 results, page 86

  1. Mathematics

    karen exchanged BDS$ two thousand dollars and received EC$ two thousand seven hundred calculate the value of one BD$ in EC$ I would just like the formula so i can work it out please
  2. college algebra

    Use properties of logarithms to condense the logarithmic expression. Wreite the expression as a simple logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions. Inx + In 15 Please show work
  3. math

    Solve for x 2^x+1 - 2^x = 112 Put this in exponent form: (3¡îx)(¡îx©ø) Put into equation form: Horizontal stretch of 2, up 3, left 6, reflection on x-axis. Please help me with these three so I can work on the rest using these as examples. Thanks so much for your help!!!!:)
  4. Physic II

    Two like charges of the same magnitude are 8.0 mm apart. if the force of repulsion they exert upon each other is 4.0 N, what is the magnitude of each charge? (The constant of proportional for the Coulombic force is 9.0 x 10^9 N.m^2/C^2 ) Please show all work.
  5. Stats

    So i have a test in stats tomorrow and im trying to work on my study guide but im stuck at this question : Construct a confidence interval for the proportion for each case 90 percent interval 861 out of 2500. please help.
  6. biochem

    How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab writeup for tomorrow .
  7. biochem

    How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab write up for tomorrow .
  8. biochem

    How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab writeup for tomorrow .
  9. Math

    Hi, I need help on this problem:Solve the system of equation by giving an ordered pair for 14x +3y = 115 7x +3y = 80 Use the 3 Methods in your work. Thank You, I am not sure how to use graphing, substitution, and elimination, please show these methods.
  10. Physics

    Suppose a 300–g kookaburra (a large kingfisher bird) picks up a 84.0–g snake and raises it 2.30 m from the ground to a branch. How much work did the bird do on the snake? I know that W=deltaPE, and PE=mgh. I keep getting 1046.64. Please help!
  11. Chemistry (30s)

    I need help on this question. I can't seem to understand it. Find the molecular formula of a compound with a gram molecular mass of 30 g and an empirical formula of CH3. Please show your work! and briefly explain how you got it!
  12. social studies

    How are interest rates and wages similar? A. Both rise due to inflation. B. both are types of prices. C. Both relate to the cost of borrowing. D. Both are payment for work done. i feel like it is D or b? please help
  13. Physics

    How much heat energy is needed to change 0.25kg of water at 100°C to steam at 100°C? Show your work. Please don't give me the answer, I just need help figuring out how to find the answer. Thanks!
  14. Physics

    How much heat energy is needed to change 0.25kg of water at 100°C to steam at 100°C? Show your work. Please don't give me the answer, I just need help figuring out how to find the answer. Thanks!
  15. math

    Given that a:b = 8:5 and b:c= 3:4 find the ratio a:b:c Give your answer in its simplest form. Show all working out. My work: 1) 5 and 3 both equal to b. 2) 8+5=13/2= 11.5 3)3+4=7/2=3.5 4)11.5+3.5= 15 All my working shown I dont understand this question please help!
  16. chem

    The radius of a single atom of generic element X is 197 picometer(pm) and crystal of X has a unit cell that is face centered cubic calc the volume of the unit cell. Please help and show all work
  17. physics- TEST TMRW PLS HELP!

    Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the lifting process. As he turns his back, the book falls off the shelf back to the ground. The gravitational force from the Earth on the book does 20.0...
  18. trig help

    I need help finding sinA if cosA=(-3/5) and A is greater than 90 degrees, but less than 180 degrees. Draw the quadrant diagram. In the upper left quadrant, greater then ninety degrees, but less than 180, cosine is neg, and sine is positive. Draw a three, four, five right ...
  19. chemistry

    N2 + 3H2 --> 2NH3 how many grams of hydrogen are needed to react with 50 grams of nitrogen? Three moles of H2 per one mole of N2. How many moles of N2 is 50 grams? 1.79 moles is 50 grams. You do these problems in steps. Step 1. Write a balanced chemical equation. You have ...
  20. Chemistry

    What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!
  21. Spanish

    Which of the following is NOT a difference between schools in Puerto Rico and schools in Los Estados Unidos? A. Classes are conducted in spanish B. Students wear uniforms*** C. There are homeschooling options D. Students study both Spanish and English Can some one help to ...
  22. English

    Which of these is the properly punctuated sentence? a)Ted went to work and Bob went home. b)Ted went to work; and Bob went home. c)Ted went to work. And Bob went home d)Ted went to work, and Bob went home. Would the correct answer be D?
  23. English

    Could you check this? Complete the questions. I wrote my answers with capital 1. Researchers are SUPPOSED TO BE VERY careful when working in the lab. 2. They ARE SUPPOSED TO CHECK and recheck dangerous experiments. 3. They are SUPPOSED TO THINK before acting impulsively. 4. ...
  24. Math

    Check my answers please. 1. What is the solution to 5 + t = 23 a. 28 b. 18 ** c.-18 d.-23 2. What is the value of b if -7 + b = -8 a. b = 15 b. b = 1 ** c. b = -1 d. b = -15 3. What is the solution to 5q = -75 a. q = -25 b. q = -15 c. q = 15 ** d. q = 25 4. What is the ...
  25. Prime Factorization

    What is the prime factorization of 1,521? Please show work. Thanks!!
  26. Algebra

    please help me to figure out in algebra 2/3-4/5-(-11/15) +7/10-5/2 the answer is 6/5 and I do not know how to work this out
  27. dog behavior

    please check my answer thanks so much :) Which one of the following commands is most like a safety net for a dog? A. Controlled walking B. Leave it C. Heel D. Emergency down I am not sure At first I think it would be B because it would stop the dog from maybe eating something ...
  28. algebra

    Megan factored the expression3x^2-23x+14 as (x-2)(3x-7) . But when Jacob applied the FOIL principle and multiplied out (x-2)(3x-7) , he got 3x^2-13x+14 ; thus, Megan’s solution does not appear to check. Why is that? Please help Megan to understand this better. Explain your ...
  29. Chemistry(Please check)

    1) Which of the following properties of water can be explained using hydrogen bonding arguments? 1. its ability to dissolve most ionic compounds. 2. its high boiling point. 3. its low vapor pressure a) only 1 or only 2 or only 3 b) 1 and 2 only c) 1 and 3 only d) 2 and 3 only ...
  30. Physics(Please check)

    A rectangular plate is rotating with a constant angular speed about an axis that passes perpendicularly through one corner, as the drawing shows. The centripetal acceleration measured at corner A is n times as great as that measured at corner B. What is the ratio L1/L2 of the ...
  31. English

    Let's write down what you can do with the computer. 1. I use the computer to chat with netizens in chatrooms. 2. I use the computer to do paper work. 3. I use the computer to make documents with the word processor, Excel. 4. I use the computer to surf the Internet. 5. I use ...
  32. Physics please check

    A cyclist approaches the bottom of a gradual hill at a speed of 14 m/s. The hill is 4.9 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which the cyclist crests ...
  33. trig

    A plane ascends at a 40° angle. When it reaches an altitude of one hundred feet, how much ground distance has it covered? To solve, use the trigonometric chart. Round the answer to the nearest tenth.
  34. Math: Calculus

    Find the smallest positive value of which satisfies -- x=4.100cos(2.800x) Give the answer to four places of accuracy._________ Remember to calculate the trig functions in radian mode.
  35. Trig

    I need help, I don't remember what to do. Find all solutions of the equation in the interval [0,2pi]. (2cosè+sqrt3)(cscè+1)=0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.
  36. TRIG

    1) Find an angle that makes the statement true: costheta =sin(3theta+10degrees) 2) Verify this proof: sec(Pie -x)= -secx Can someone show me how to solve for these. Very much appreciated!
  37. trig

    Let P be the point on the unit circle U that corresponds to t. Find the coordinates of P and the exact values of the trigonometric functions of t whenever possible. 2pi 3pi/4 5pi/6 Three questions. I think those are supposed to be t.
  38. Math:Trig.!!!!

    You (safely) bungee jump from a 200-feet tall bridge in your town. Your distance above the water's surface depends on the time since you jumped. Sketch a reasonable graph.
  39. English

    Can someone suggest any poems that somehow encapsulates the sentiments of Huckleberry Finn" by Mark Twain? I know of none, but one process you can use that MIGHT work is this: Go to and wander around until you find something that resembles something ...
  40. physics

    A 400g glider moving to the right at 2 m/s collides elastically with a 500g glider moving in the opposite direction at 3 m/s. find the velocity of each glider? please show work so i can understand it! thanks
  41. Exploring Space

    rocket engines which work in space still need oxygen 4 the fuel to bur. space is a vacuum. where does the oxygen come from? I'm stumped on this, can someone please lend me help, thanks
  42. Math

    3) Explain how the laws of exponents work with rational exponents and give at least one example of an expression containing rational exponents... Please help.. I can't find the answer to this anywhere..
  43. Chemistry

    N2+O2 <-> 2NO Equillibrium Concentrations of the gases at 1500K are 1.7x10(-3) mol/L for o2 and 6.4x10(-3) mol/L for N2 and 1.1x10(-5)mol/L for NO. CAlculate the value of Kc at 1500K for these data? Show work please
  44. Physic

    The position of a mass on a spring is given by x = (7.6 cm) cos [2 π t / (0.82s)]. Where is the mass at t = 3.1 s? (Answer: 1.45cm) Answer is provided above. Please show all work on how to get the answer. Thank you.
  45. English

    How have the definitions of work, success, wealth, opportunity, and family changed over time? what does this question mean? how do you write your opinion? You might consider these questions: Is work what you get paid to do? Is work what you accomplish? What is work? Is success...
  46. trig

    how do you solve cot theta divided by csc theta is equal to cos theta?
  47. Trig Identities

    If tan(theta)=7/13 and cos(theta)<0, what is the exact value of sin(theta)?
  48. trig

    Given that tan 45=1, use tan(x+y) to show that tan 22.5= /2 - 1. (/is square root sign
  49. trig

    If sinθ>0 and tangθ<0, explain how to find the Quadrant in which θ lies.
  50. trig

    If a and b are the measures of two first quadrant angles and sin a = and sin b = , find sin (a + b).
  51. Trig

    How do I find the quadrant in which angle thada may lie if cos thada > 0 and tan thada < 0?
  52. trig

    How do I name the quadrand in which angle thada may lie if sec thada > 0 and tan thada > 0?
  53. Trig

    Given sin theta = -3/5 and 0 is in quad 2, find Cos theta and tan theta
  54. trig

    for what values of theta between 0 and 2 pi is the function of theta equal sine theta positive?
  55. trig

    What does sin(squared)t + cot(squared)tsin(squared)t equal? and can someone explain it?
  56. trig

    If theta is a standard position angle and cot theta = 1.85, in which quadrant(s) could theta lie?
  57. Trig.

    I'm trouble solving for theta. Any help is appreciated. 0.73377324 = sin(theta)/cos(theta)
  58. trig

    if 5sin theta + 12cos theta is equal to 13 find the value of tan theta
  59. Trig help

    1. What is the period of the function? y = 4 cos pi x A. 1 B. 2 C. pi D. 2pi 2. Which represents the reference angle for 2pi/3? A. 2pi/3 B. pi/3 C. pi/4 D. pi/6
  60. Math

    An electrician charges $120 after 2 hours of work and $190after 4 hours of work .write a linear model that represents the total cost as a function of the number of hours worked
  61. Math / Algebra

    Factor: 8ab - 16ac + 12a anyone wanna help me out with this, i know how to normally work out problems like this but for some reason im not getting the correct answer when i work it out...
  62. Calculus (area of base and volume of solid)

    Can you check my work and see if I did the problem correctly? Thanks! A solid with a base formed by intersecting sine and cosine curves and built up with semi-circular cross-sections perpendicular to the x-axis. Find the area of the base and the volume of the solid. Integral...
  63. English

    Can you please check my sentences? Thank you very much for your invaluable help. Which sentence (2 or 3) paraphrases the concept of sleep? 1) Sleep is imagined as a bath after heavy work, in which the body can relax and recover from injury. 2) Sleep is then compared to a ...
  64. math 012 double check me please

    9x+3(x-4)=10(x-5)+7 9x+3x-12=10x-50+7 12x-12=10x-43 subtract -12 from both sides and that leaves -12=-2x-43 add 43 to both sides and that leaves 31=2x then the answer is x=31/2 (a fraction) im so confused and its even harder trying to type it out and not confuse anyone reading...
  65. chemistry

    please check my answer(one with star). The solubility of borax is directly proportional to temperature. Therefore, the sign of H is A. negative* B. positive C. unknown with the given information since solubility shifts the reaction to the right, therefore it is exothermic so H...
  66. math

    In bowling, a handicap is determined by subtracting your bowling average from 180 and then finding 80% of this difference. Freddie bowls games of 178, 156, 149, 155, 172 and 180. Freddie's handicap is__________. I came up with 12. Could you check if this is correct please? ...
  67. Chemistry Check Please!!!

    Using a table of standard electrode potentials (as in Appendix M of your text), calculate the standard cell potential, Eo, for: 2 Fe2+(aq) + Cl2(g) 2 Fe3+(aq) + 2 Cl(aq). Answer: Anode: 2 Fe2+ 2 Fe3+ + 2 e Eox = 0.771 V Cathode: Cl2 + 2 e 2 Cl Ered = +1.36 V Enet = +0.59 V
  68. science (check please (:)

    8.Which of the following would help decrease the human ecological footprint? . . . . . . . . . . . . . . . My answer: using public transportation instead of riding in a car? (I have doubts on my choice) but my other choice is using bottled water instead of tap water?
  69. History

    Check this please~?~?~ 1. C,A,D 1.Which are correct definitions for history? Choose all answers that are correct. A.the study of human adaptation to the environment B.the story of how the world has changed and how it has not changed much at all C.a retelling of what people did...
  70. Trig

    Evaluate the trigonometric function using its period as an aid. cos 5pi how would i go about finding the period and what is a period?
  71. trig

    simplifying trigonometric expression a) sinx/tanx cosx b)sin^4a + sin^2a cos^2a c)sin0-sin0cos^2+ / sin^20 could someone help me with these?? thank you
  72. trig

    If the point (-3,0) lies on the terminal side of angle theta in standard position find: a) csc theta b) cot theta
  73. trig

    Use a calculator to find: θ if θ = csc-1 1.7516. θ = _____°. Round to three decimal places.
  74. trig

    Two oil Wells are 4 km and 6 km from the river. The points along the river are 8 km apart. Find the common loading point on the river.
  75. Math

    please check my answer thanks :) Mike purchased a home the mortgage is $235,000 at 8 3/4 % for 25 years. His annual property taxes on the home are $6,345 he also has to pay hazzard insurance in the amount of $1,479. What is the PITI payment of their loan ? I am not to sure ...
  76. Grammar and Composition

    Please check these for me: Write the plurals of the following singular words. 1. hero : heroes 2. sheep : sheep 3. sister-in-law : sisters-in-law 4. journey : journeys 5. princess : princesses 6. spoonful : spoonfuls 7. victory : victories 8. stepchild : step children ? 9. ...
  77. English

    Can you check the grammar in these two sentences, please? Thank you. 1) Best would be to know the name of the principal "and" the teacher who is designated with these programs; if I find that information I post it to you. 2) Addressing both would be considered as very polite ...
  78. geography

    Will you please check my answers? 1.What states border Lake Michigan? Wisconsin, Illinois, Indiana, and Michigan 2. How many states are on the 60 degrees N line of latitude? Just one state ( Alaska ) 3. What do the following countries have in common: Chad, Paraguay, Hungary, ...
  79. math

    Can someone please check my answers and help me with the last question! 1. Solve sin2xcos2x = 4sin2x on the interval [0, 2pi] 0, pi, 2pi? 2. Exact value of sin(pi/12) - sin(5pi/12) root3/4? 3. Using factorial notation, 0! = 1 False? 4. Find the area of the following triangle. ...
  80. algebra

    I just need a quick check before I hand in my work if you would...Thanks. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and -6 for x I got these as my ordered pairs to graph (3, 1), (-6, 4)…Is this correct? 2. Multiply -2/1*(-6/...
  81. check my work

    1. Which of the following provides the best definition of a strict constructionist interpretation of congressional power? (1 point) Congress must have more powers than the states. Congress should only use implied powers when directly connected to expressed powers. Congress ...
  82. Physics

    so I'm doing the back of this worksheet and on the bottom there's a list of a whole bunch of formulas... I'm asked to find the minimum coefficent of friction if the road was flat of a car which I still don't know how to do and posted a question about it below but anyways... so...
  83. physics again (check answers please)

    What net force increases a velocity of a car from 20 m/s to 35 m/s in 8.0 s if the mass of the car is 1600 kg? (3000 N). What force would cause the car to stop? (3000N) What coefficient of friction is needed to supply the force of friction? (.0191) are they correct?
  84. English

    Please check for any errors and correc them. Thanks!!! As we discussed, I have made reservations for three days for a sweet of rooms at the North British Hotel in Glasgow Scotland. There are three connection rooms in the sweet. It should suite your needs quite satisfactorily. ...
  85. English

    1. You can check prices for bicycles on the Internet. 2. You can check prices about bicycles on the Internet. -------------- Can we use 'for' and 'about' in the sentence? Which preposition is commonly used? Can we use some other expressions for 'for? Concerning, regarding...
  86. Math - check my answers :)

    1. Find the amplitude, if it exists, and the period of y=tan 1/4È Answer: No limits in amplitude, y=tanÈ/4 period is 4pi 2.Solve x = Arctan(-sqrt3) Work: Pythagorean theorem: sqrt(1^2+3)= sqrt4=2 in length. Triangle is 1, sqrt 3,2 Answer: -60° 3. In triangleABC, A = 35°, a...
  87. Bit rate and probability

    Attention, please show the calculations in details, comments have to be provided. You have information source with M symbols. 1. Calculate the amount of the information in bits for one M-ary symbol, considering that the probabilities of the symbols are the same. 2. Calculate ...
  88. Check this please?

    I am writing about how different groups view the role of the government. I saw this online and wanted to use it to guide me through my essay, but wanted to check its accuracy because I thought Democrats weren't for higher taxes I thought Republicans were. Those in favor of a ...
  89. Math

    The height was 30, the width was 25,and the length is 20. What is the volume, in cubic inches, of the block of ice? I think you multiply 30x25x20 and get 15,000. The answer is 15,000 cubic inches. Harry wants to make another block of ice with the same volume. He needs one ...
  90. Social Studies

    Buddhism became popular in part because it did not defend.... 1. dharma 2. the Hindu gods 3. the caste system**** 4. life after death This religion believes that the way to stop suffering is to stop desire 1. Buddhism*** 2. Judaism 3. Hinduism 4. Jainism This religion believes...
  91. ALGEBRA 3

    so wat do u mean by that WHICH ORDERED PAIR IS A SOLUTION OF THE FOLLOWING SYSTEM OF LINEAR EQUATION 2X-5Y=NEGATIVE 12 NEGATIVEX +4Y=9 A{NEGATIVE6,0} B{3,3} C{NEGATIVE1,2} D{2,2} I will be happy to critique your thinking on this. I mean I wont do your homework/tests for you, ...
  92. NHD (Social Studies)

    Please help me out on answering this question: For a working bibliography, how is a title for a website cited? Thank you tutors for reviewing the question. I might have more social studies questions and then algebra questions, so if you see more questions under the subject NHD...
  93. English composition

    I bought a pedometer on the Auction site on-line, so I can measure my steps. If I walk for 10,000 steps a day, it will be helpful for my health. This product was made in China, and it is 1,500 won. It is inexpensive. Because I can check how many steps I can walk, it will be ...
  94. math

    Peter received a six month post dated check for Php 100,000.00.(The check can only be cashed after six months.) He offers it to his friend for Php 92,000.00. His friend's money is presently earning 10% compouunded monthly. If there is 20% withholdingtax on interest, which is ...
  95. Math

    Bilawal can build a wall in 15 days and Bilal in 20 days. If the work on it together for to days , then the fraction of the work ?
  96. Math

    Bilawal can build a wall in 15 days and Bilal in 20 days. If the work on it together for 4 days , then the fraction of the work ?
  97. Math

    Bilawal can build a wall in 15 days and Bilal in 20 days. If the work on it together for 4 days , then the fraction of the work ?
  98. Science

    You do 100 J of work in pulling out a nail with a claw hammer. If the hammer does 70 J of work, what is the hammer's efficiency?
  99. Reading Comp.

    When we have too much work to do we become very anxious It is vital to set priorities and work on the most important things first. What does the second sentence do? a. It gives an example b. It makes a contrast c. It proposes a solution* d. It states an effect
  100. statistics

    Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17. Based on these numbers, we can say that approximately 50 percent of SOC 390 students work more than ____ hours per week
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