Trig check my work please?

88,487 results, page 87

physics

an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block? please help and show work

chemistry

Are my answers correct? Identify each energy exchange as primarily heat or work and determine weather the sign of ΔE is positive or negative for the system. A. A rolling billiard ball collides with another billiard ball. The first ball (system) stops rolling after the ...

chemistry

Are my answers correct? Identify each energy exchange as primarily heat or work and determine weather the sign of ΔE is positive or negative for the system. A. A rolling billiard ball collides with another billiard ball. The first ball (system) stops rolling after the ...

math

how would you solve for y in this problem: x=(y^2+3y)^(1/3) I got: y= x^3/y - 3 ? and for this problem: x= 1/[(y^2+3y-5)^3] I got: y = y/x + 5/y - 3? However, I do not know how to solve for y explicitly. I don't think quadratic formula would work in these problems. Please help...

math word problem

Andy and William work together to build a toy house. It will take William 5 hours and Andy 4 hours, or William 10 hours and Andy 2 hours to finish their work. If William works alone, how many hours will it take to finish his work? 5 10 15 20 Explain how you arrived at the answer.

english/check please

Change each of these indirect quotations to direct quotations.Punctuate your quotation properly. examples: - Mrs king said,"I enjoyed our golf game" _Mrs king said that she enjoyed the golf game. 1)Mrs.King said that she wants a new putter. -Mrs King said," I wanted a new ...

Grammar

Can you please check these? Thanks. Vowel Pairs: freezing rain sleet beat gray streets blue play Kay raisin feel easy Vowel Digraphs: looked said caught headline said school because heavy weather good sleigh said could neighbor bread instead

physics

A 100kg mass starts from rest at the top of an incline plane that makes an angle of 35 degrees with the horizontal, the coefficient of friction of 0.005 between the ramp and the mass. The mass slides down the ramp and then slides to a stop on a surface with coefficient of ...

physics

A 100kg mass starts from rest at the top of an incline plane that makes an angle of 35 degrees with the horizontal, the coefficient of friction of 0.005 between the ramp and the mass. The mass slides down the ramp and then slides to a stop on a surface with coefficient of ...

SCIENCE

CAN SOMEONE PLEASE HELP ME AND TELL ME IF IM RIGHT even a guess would be good ive been trying 4 a answer since 6:00 PLEASE help me :/ i think that the 2nd one is correct because i no that energy is not lost when water is boiled it is gained because of the bubbles and electrons...

Chemistry - DrBob222 please check and help

Can you check these? And I need help on one. Oxidation Number Method of Balancing Redox Reactions 1)Neutral Solution Sn^2+ + Fe^3+ ----> Fe^2+ + Sn^4+ Balanced equation Sn^2+ + 2Fe^3+ ----> 2Fe^2+ + Sn^4+ 2)Acidic Solution Fe^2+ + Cr2O7^2- ---> Cr^3+ + Fe^3+ Balanced ...

Chemistry - DrBob222 please check and help

Can you check these? And I need help on one. Oxidation Number Method of Balancing Redox Reactions 1)Neutral Solution Sn^2+ + Fe^3+ ----> Fe^2+ + Sn^4+ Balanced equation Sn^2+ + 2Fe^3+ ----> 2Fe^2+ + Sn^4+ 2)Acidic Solution Fe^2+ + Cr2O7^2- ---> Cr^3+ + Fe^3+ Balanced ...

Agility Training

please check my answer thanks :) A run-out occurs when a dog A. runs off the course. B. jumps off an obstacle. C. must turn back to complete the next obstacle. D. takes an obstacle out of sequence My answer is D

math

please check my answer. each test is worth 100 points. the following test have been taken and earned 91, 90, 93. for a total of 360 points to earn an A, what grade should be made on the final test to earn an A my answer is 91.5

geography, Ms. Sue

Thank You I have two more. Will you check them for me please? 1. What two deserts does the Tropic of Capricorn cross on the continent of Africa? The Kalahari and Namib deserts 2. Is 80 degrees N closer to the equator than is 40 degrees S? No, 40 degrees S is closer Thanks ...

Child Development

Which of the following groups requires more irregular scheduling than the other three groups? A. 12-to 18 months-old B. 3-t0 5 years old C. school age children D. 18 - to 36 months old My answer is C can someone check my answer please

6th Grade Math

Can you check my answers please? 1. Convert 2 and 3/4 qts to pints. 1 qt = 2 pints (unit ratio = 2/1) 2 and 3/4 x 2/1 = 9/4 x 2/1 = 22/4 = 5 and 1/2 pints 2. A 40-foot power boat is for sale. How long is the boat to the nearest yard? 1 ft = 3yds (unit ratio = 1/3) 40 x 1/3 = ...

Please check this :D

Tyler wrote a paper describing life in England in the eighteenth _________, from ______ to ______. I think its A. A. century; 1801, 1900 B. decade; 1701, 1800 C. century; 1700, 1799 D. century; 1701, 1800

Art

Thank you very much. I still need you to check a few urgent things, Writeacher. 1)The line is engaged. Would you hold? Would you like to hold the line? Would you like to hang on/hold on? Which are possible? 2)You needn't have bought the milk; there was some already/there was ...

math.can someone check my answers?

can someone check my math answers its only 5 questions thanks. please check my answers ! 21. Find the unit price for each option shown below. Round to the nearest cent when necessary. Indicate which option is the better buy. Option I: 10 candy bars for $6.75 Option II: 12 ...

Math

Andy and William work together to build a toy house. It will take William 6 hours and Andy 4 hours, or William 10 hours and Andy 2 hours to finiah their work. If William works alone how many hours will it take to finish his work?

cell biology

1.The________particle halts the translation of the mRNA to a polypeptide before checking to the ER a. singal recognition, permanently b. signal recognition protein receptor, permanently c. singal recognition, temporarily d. signal recognition protein receptor, temporarily I ...

Child Care

Which of the following statements about children and computers is incorrect? A. To be effective, a child's computer learning experiences must be planned and supervised. B. At a day care center, computer time should be scheduled like any other activity. C. During children's ...

Language Arts, check!!!

Which statement from "Why Do We Need Zoos?" best captures the author's point of view? 1. "...zoos were open to the general public, too, so everyone could find out about animals." 2. "Some people feel that there is lots of wild space and that animals should only live there." 3...

math urgent please help

Mrs Buttler bought 1,800 shares of Stairwell Mutual Fund At an offer price of $3.00 per share. She later sold the shares at a net asset value of $4.60m per share. During the time Mrs Buttler owned the shares, Stairwell Mutual paid adividend of $0.80 per share. What is Mrs ...

Physics -

The work function of cesium surface is 2.0eV (a)find the maximum kinetic energy of the ejected electrons when the surface is illuminated by violet light with wavelenght = 4.13 x 10^3 Angstroom unit h = 6.63 x 10^9-34)Js (b) what is the threshold wavelenght ( the largest ...

physics

Consider the system shown, with m1 = 2.0 kg, m2 = 3.0 kg, and á = 30o. The force F acts horizontally to the left and the kinetic coefficient of friction between m1 and the incline is ìk = 0.40. The mass m2 is moving up at a constant speed. (a) What is the magnitude of F? (b...

Algebra 2

would some one please check these for me 1. divide x^2-36y^2 over 5x^2+30y divide (x^2-6xy) A: x+6y over (5x)(x^2+6y) 2. Add. Express your answer in simplest form. 2x 0ver x^2+15x+54 + 4over x+6 A: 6 over x+9 3. solve: (9 over x-5) -1= 8 over x+5 A: -10 and 11 This one I am ...

physics

The magnitude of the electric field between the plates of a parallel plate capacitor is 3.0X10^5 N/C. Each plate carries a charge whose magnitude is 0.17 µC. What is the area of each plate? can someone please work with it in numbers!!

statistics

Assuming that the weights of newborn babies are normally distributed with mean 6.5 pounds and standard deviation 1.2 pounds, how many babies in a group of 80 do we expect to weigh more than 8.9 pounds? Please show work Thank you

algebra

List all possible rational zeros for the polynomial below. Find all real zeros and factor completely. Please show all your work. f(x) = 2x^4 + 19x^3 + 37x^2 - 55x - 75

Chemistry

When 50.0ml of 1.00M HCl is titrated with 1.00M NaOH, the pH increases. calculate the difference in pH of the system when you add 49.99ml NaOH and 50.01ml of NaOH. Please work out detailed steps.

math

Paul multiplied the sum of three and a number by three. This result was equal to fifty four plus twelve times the opposite of the number. What was his number? please explain and show work.

physics

100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop? Please show your work.

U.S.History

please check: 1. Which of the following best describes the ideology of Transcendentalists? a. humans are naturally bad b. Individuals should rely on outward rituals and group worship c. People's lives have been predetermined by God d. humans should be self-reliant and act on ...

English

Can you check these please? 1)It would be nice if our Italian students could start an e-mail exchange with their new American friends. 2)The committe has organized a buffet farewell party to wish the American students a good journey home. 3) What time are you flying back? Have...

English

Hi! ____ 13. Which of the following statements would best state the main theme of The Call of the Wild? (1 point) a) Perseverance pays off. b) Only the strong survive. c) If at first you don’t succeed, try and try again. d) Keep your friends close and your enemies closer. My...

physics

A horizontal force of magnitude F = 116 N is used to push a box of mass m = 9 kg from rest a distance d = 13 m? 1)How much work is done by the force on the box? WF = 2) How much work is done on the box by the gravitational force during this same displacement? Wg = 3) How much ...

trig

Which expression is equivalent to tan theta-sec theta/sin theta? I don't get this

Math - Trig

Given that a measures 25.1 mm, x measures 51.2 mm and angle b measures 82°, find the length of y -

trig

if sec theta=-5/4 and 180degree < theta< 270degree, find tan theta a.-3/5 b 4/5 c.3/4 d.3/5

trig

if one of a quadratic equation is 1/2-2i, what is the equation. the other root is 1/2+2I but i don't know how to find the equation

trig

establish identity 5csc^2theta-3cot^2theta=2csc^2theta+3

Pre-Calc/Trig...

standard form: y=x^2-4x-5 vertex form: ? intercept form: ?

Trig

secθsinθ is equivalent to: Ans: tanθ?

Trig

Which is cos2 theta if sin theta = -2/sqrt13 and 180 < theta < 270? 1. -(13/5) 2. -(5/13) 3. 5/13 4. 13/5 3?

Trig

Given Tan(A) = 5 in Quadrant III and Sin(B) = ⅔ in Quadrant II, what is the Quadrant of A-B?

accounting

Can anyone help me with this? Guard Dog Company recently changed its system of internal control over cash disbursements. The system includes the following features. Instead of being unnumbered and manually prepared, all checks must now be prenumbered and written by using the ...

accounting

Guard Dog Company recently changed its system of internal control over cash disbursements. The system includes the following features. Instead of being unnumbered and manually prepared, all checks must now be prenumbered and written by using the new checkwriter purchased by ...

math 11

The axis of symmetry of a graph is the vertical line x=5. One of the x-intercepts is (11,0). What is the other x-intercept. Explain how to do this either by showing work or how to enter it into the TI83Plus. Up until now I've had equations to work with so this one has me stumped.

Algebra 2

In triangle ABC , <C is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. Show your work. a = 3, c = 19 c^2= a^2+b^2 19^2 = 3^2+b^2 361= 9+b^2 b= √352 = 18.8 tanA= 3/18.8 A= arctan (3/18.8) A= 9.1 tanB= 18.8/3 B= arctan (18.8...

Math

A football coach divides 42 players and 12 coaches into groups. Each group will have the same number of players and coaches. What is the greatest number of groups that can be formed? a. 12 groups b. 6 groups c. 2 groups d. 4 groups My answer is 6 groups because I found out ...

statistics check my work thank you

what is the sample size, mean, and standard deviation for patients who were given and NOT given antiobiotics (key 1= yes 2=no) Received Antibio Duration of stay in hosp 2 5 2 10 2 6 2 11 2 5 1 14 1 30 2 11 2 17 2 3 2 9 2 3 1 8 1 8 2 5 2 5 1 7 2 4 1 3 2 7 2 9 1 11 2 11 2 9 2 4...

Physics, van de graff generators...

When a small metal ball with a charge is placed in an electrical field supplie dby a van de graff generator, it experiences a force from the generator, and thus it applies a reaction force. But does the ball also apply a force met with a reaction force of the generator? Also, ...

Spanish (Sra)

Can someone check my work? English: My cousin came over to play. We were running around the living room. My brother and cousin crashed into each other. And my brother cut the corner of his eye open. Spanish: My primo vino a jugar, Nosotros estábamos corriendo alrededor de la ...

Computer

What types of issues can you likely resolve by knowing how to access and use the Control Panel? Choose all that apply. network issues*** screen resolution and volume issues**** frozen application issues virus issues What can help prevent issues related to downloading content ...

military , math

the emergency water storage capability your squad set up now holds 7,000 cubic feet of water. YOur commander has asked to fill it up. You estimate that a facility will hold 8,478 cubic feet. HOw many gallons are required to fill the facility? 11,055 74,470 63,415 52,360 I will...

Thank Jiskha tutors

I really appreciate all that you tutors do for us, I know we may be a bit demanding sometimes XD but we really love how you guys are always there to help us out. Coming from experience, I've had some past teachers that aren't as willing to help us when we do not understand and...

French

I would like to double check my work on a few questions: 1. Nous voulions sortir mais ________ la neige tomber, nous avons décidé de rester chez nous. Answer: voyant 2. J'attends ________ de ma meilleure amie. Nous allons au concert ce soir. un coup de téléphone - une soir...

Computer Question

This is not a homework question, but does anyone know how I could fix this: my cousin has Norton Internet Security and she has over 200 days of subscription remaining. But the thing is that none of the scans work. Also whenever she clicks Norton Internet Security these boxes ...

chemistry

A quantity of 0.020 mole of a gas initially at 0.050 L and 20 degrees Celsius undergoes a constant-temperature expansion until its volume is 0.59 L. Calculate the work done (in joules) by the the gas if it expands (b) pressure of 0.20 atm. (C) If gas in (b) is allowed to ...

Chemistry

A quantity of 0.020 mole of a gas initially at 0.050 L and 20 degrees Celsius undergoes a constant-temperature expansion until its volume is 0.59 L. Calculate the work done (in joules) by the the gas if it expands (b) pressure of 0.20 atm. (C) If gas in (b) is allowed to ...

Language Arts (Check my work please?)

2. An example of literal description in the poem is (1 point) a) the sun brightening valleys. b) an audience being moved by a speech. c) the words of the president being relevant for a long time. *** 3. What makes this poem an analogy? (1 point) a) It uses comparison to ...

Language Arts

Which of the following situations in "The Censors" represents an example of situational irony? A) Juan ends up being executed after censoring his own love letter to Mariana. B) Juan decides to report a colleague for trying to organize against the organization they work for. C...

Pre-Calculus

How do you work this problem. I cannot find an example in the book to illustrate how to work it. Find the value of tan(a-b) if cos a=-3/5, sin b=5/13, 90<a<180, and 90<b<180 Thanks for any help

English

Define Socialism. George Orwell doesnt think Socialism can work. WHY? How does he prove that it doesnt work by the way Animal farm ends?

Math

It took Markus half an hour to drive home from work.He averaged 34 miles per hour. How far does Markus live from work?

Math

Mr Connors drives his car 11 miles each day to and from work. Is this distance mr Connors drives commuting to work proportional to the number of days he works ? How do you know?

Math

At the Highland Hotel 578 of the 850 employees work directly with the guess. What percent of employees work directly with the guests? How do I figure it out?

algebra

Determine the length of the missing side of each right triangle. Show your work. 1)a=15; b=?; c=20 Answer is b= 5√7 2)a=9; b=12; c=? Answer is c= 15 **How do I show my work to come up with each of these two answers? THANK YOU!!

math

Mr Ahmad starts work at 11.40 on Tuesday.He works for 12h45min.When does Mr Ahmad finish his work?Express your answer usering the 24-hour clock Math

Algebra

Write the equation of the line L satisfying the given geometric conditions. L has y-intercept (0,2) and is perpendicular to the line with equation 2x-3y=6 Show work I will be happy to critique your work on this. 3x+2y=4?

Math

A river does 6,500 J of work on a water wheel every second. The wheel's efficiency is 12%. a. How much work in joules can the axle of the wheel do? b. What is the power output of the wheel in 1 s?

physics

Consider the following figure. (a) Determine the work done on a fluid that expands from i to f as indicated in the figure. J (b) How much work is done on the fluid if it is compressed from f to i along the same path? J

math

A man,a woman and a boy can complete a piece of work in 20,30 and 60 days respectively.How many boys should join 2 men and 8 women to complete the work in 2 days?

physics

You use an inclined plane to move furniture into a truck. You perform 224 kJ of work, but only do 91 kJ of useful work. What is the efficiency of the inclined plane?

Math

How do you go about solving this? If you got paid $15 for 3 hours of work one day and $45 for 8 hours of work on another day, find your hourly rate of pay for the 2 days

physics

A net force of 1000 N is needed to accelerate a small 1200 kg car from 5 m/s to 8 m/s. Use the work-energy theorem to determine the net work done by the force.

math

a) from a to of 12 flatres, 4 are selected at random. if the lot contains 4 defective flares (flares that wilt fire), what is the probability that all 4 will not work? B) what is the probability that at most 2 will not work?

U.S.History

please check What message did the Protestant revivalists preach in the early 1800s? a. God places individuals in predetermined and rigid social ranks b. The power of individuals is equal to the power of God c. People are capable of shaping their own destinies d. Society should...

geography

Will you please check my answers? 1. What continents are located on a single land mass? Antarctica and Australia 2. In what direction would you be going if you were to fly from South Dakota to North Carolina? Southeast 3. In what part of the United States is Washington DC ...

chemistry (Pls Bob check for me)

0.5g of fuming h2s04 oleum is diluted with water. This solution is completely neutralized by 26.7ml of 0.4N naoh. Find the percentage of free so3 in the sample My calculation h2s04 = 98g/mol s03 = 80g/mol 98/2 = 49 80/2 = 40 26.7ml x 0.4n = 10.68ml - 0.01067L x/49 + x/40 (0.5-...

Chem Check Please!!!

Using standard thermodynamic data from Appendix L of your text, calculate the equilibrium constant at 298 K for the following chemical reaction: CO(g) + H2O(l) CO2(g) + H2(g). Answer: CO(g) + H2O(l) CO2(g) + H2(g) G = (394.359 + 0) (137.168 237.15) = 20.04 kJ/mol G = ...

Introduction to Graphic Design

Hello! Thanks for checking my question out! ____ 4. What are the two broad categories of painting styles? Select all that apply. (2 points) a) abstract b) acrylic c) realistic d) realistic e) watercolor Yes, there are two answers with the same choice. My Answers: A and C Could...

English

Thank you Ms. Sue for your invauable help! Here is the second part of the letter I need to hand in by tomorrow. As writeacher is not there, could you please help me check it? Many thanks in advance. This two-year project will be mainly about a comparative study on biodiversity...

math

Double check please Write each of the following as a common fraction or mixed number. Write your answer in lowest term 28. 15.35 Answer: 1535 / 100 = 307/20 = 15 35/100 is 15 7/20 Complete each of the following statement, using the symbol < or > 5/16 _0.313 Answer >

education

1.Transition planning for children with special needs should focus primarily on: a.maintaining continuity of services b.getting the child ready for school c.the family's needs d.the child's needs. My answer is d.the child's needs. Will someone please check my answer

Math/Physics

Please check my work below and comment. A tank initially contains 80 gallons of fresh water. A 10% acid solution flows into the tank at the rate of 3 gallons per minute. The well-stirred mixture flows out of the tank at the rate of 3 gallons per minute. Find the amount of acid...

trig

Find the exact value of the trigonometric function given that sin u = − 8/17 and cos v = − 3/5. (Both u and v are in Quadrant III.) cot(v − u)

Trig

Half Angle Identities cosx = 7/25 greater than 270 deg and less than 360 Determine cos 1/2x a. -7rt2/10 b. 7rt2/5 c.7/25 d.-4/5 I get 7rt2/5 Is this correct??

trig

a. A sector that has been cut out of circular plastic sheet which has a circumference of 12.31 m. If the central angle of the sector is 1/4 of a revolution, find the area of the sector.

Trigonometry

How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.

trig

i nead to find to the nearest degree all values of theta in the interval 0 x 360 that satisfy the equation 3 cos 2 theta+ sin theta-1=0

math

Would this be a good resource for my students? This website? Yes, I believe so. We have several people who are very good at helping students with their math homework questions, from elementary school through college levels. Be sure to check out the Mathematics collection, too...

E.L.A. PLEASE CHECK!

Which choice best describes the underlined words in the sentence? Use a star chart to identify the stars and planets on a clear night. Underlined: (The whole sentence is underlined) A-simple predicate B- compound predicate C- complete predicate D- none of the above I think it ...

Math

Taryn mowed lawns. Taryn mowed 9 lawns within the past week. Time spent mowing lawns (in hours)=7.5 Money Earned=$112.50 How much does Taryn charge to mow a lawn? $15.00 per hour Can you please check to see if this is correct? Thank you

math

Can someone check my math homework? I have to set up an equation... my math teacher said that I didn't show how I set up the equation. can someone show me how to do that please? My work is under the question. 7. Anne is seven years younger than her brother, Brandon. Anne is 23...

math

Can someone check my math homework? I have to set up an equation... my math teacher said that I didn't show how I set up the equation. can someone show me how to do that please? My work is under the question. 7. Anne is seven years younger than her brother, Brandon. Anne is 23...

Physics

please check my answers, they are Capitalized 1. the SI base unite used to measure mass is the a. meter b. second. C. kilogram d. liter 2. how does a scientist reudce the frequency of human error and minimize a lack of accuracy? a. take repeated measurements b. use the same ...

English

Can you please check these two sentences, again? I had misspelt a noun in my previous post. 1) Define the interior monologue providing an example of its use from the readings done in class. Explain then in what way it differs from the stream of consciousness. 2) Focus on Joyce...

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