Trig check my work please?
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trig
can someone please help me with this problem. i'm doing my review right now and i'm stuck? Find cos(s + t) given that cos s = 1/3, with s in quadrant 1, and sin t = 1/2, with t in quadrant 4. 
PreCalculus
I posted earlier and didn't get an answer so I'm posting againhoping someone could please check these twoI think they're correct Please check my answer: I think it's correct? 1.Find polar form of (3,2) r=sqrt of (3)^2 + 2^2)=sqrt (13) = 3.61 tan^1(2/3) = 33.79 18033.79... 
trig
How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks! 
5th grade Math
Find the product. Estimate to check. 0.12 X 04 _______ O.108 How do I estimate to check? 0.07 X 9.2 ________ 0.644 How do I estimate to check? 0.848 X 3.2 _________ 2.7136 How do I estimate to check? Choose the better estimate 22 X 0.6 a.(12) b.(1.2) I chose a 2.3 X 4.8 a.(10... 
Math
Can you Check my work please? Let N(t) be the number of bacteria after t days. Then N(t) = Pa^t for some constants P and a. Measurements indicate that N(4) = 5600 and N(8) = 362, 000. b. Write down two equations for P and a, one when t = 4 and the other when t = 8. c. Use ... 
Physics
In a coordinate system, a vector is oriented at angle theta with respect to the xaxis. They y component of the vector equals the vector's magnitude multiplied by which trig function? ... please explain 
Physics
In a coordinate system, a vector is oriented at angle theta with respect to the xaxis. They y component of the vector equals the vector's magnitude multiplied by which trig function? ... please explain 
math
Can you please check my work. A particle is moving with the given data. Find the position of the particle. a(t) = cos(t) + sin(t) s(0) = 2 v(0) = 6 a(t) = cos(t) + sin(t) v(t) = sin(t)  cos(t) + C s(t) = cos(t)  sin(t) + Cx + D 6 = v(0) = sin(0) cos(0) + C C=7 2= s(0) = ... 
Health: Check answers
Jakob went for lab tests, it took three tries with a needle to get any blood into the vial. Why might that be? Jakob may be dehydrated. Jakob had six vials of blood taken, is this healthy? Yes, if it wasn't then his doctor wouldn't have done that many. Check answers please? 
math
can someone check my work please? 1. Seven times a number, added to the sum of the number and eight. 7*x+8 2. A number multiplied by 7 less 11 X*(7)11 3. A number multiplied by 9, added to 8 X*9+(8) 4. 8.7 less than a number 8.7x 5. The sum of a number and 12 decreased ... 
Calculus
Use the function f to solve the following: a) Local minima, local maxima, and stationary points if any. Show work. b)Intervals of upward concavity and downward concavity if any. Show work. c) Inflection points if any. Show work. f(x)=2x+1/x2 Please, don't do steps for first ... 
Physics(Please check)
A gas, while expanding under isobaric conditions, does 660 J of work. The pressure of the gas is 1.40 x 105 Pa, and its initial volume is 1.70 x 103 m3. What is the final volume of the gas? Would I multiply the two values? W = p*dV = p(Vf  Vi)for isbaric p is constant. ... 
algebra check please
help i am stuck : 8  5y = 12  9y i got: 812 5y = 1212  9y 20  5y = 9y 20 +20  5y  9y im so stuck idont understand this one can you please help me 
History
Can someone please check my work? 18) Many wealthy American industrialists of the late 19th century used the theory of Social Darwinism to: a. Support the labor union movement b. Justify monopolistic actions c. Promote legislation establishing a minimum wage d. Encourage ... 
science
Select the choices in which work is done by recording "yes" or "no": 1. Reese completing her chemistry homework. NO? 2. the movers carrying Catalina's amplifier from the moving truck to her house. NO? 3. Li pushing his motorcycle down his driveway. YES? 4. Reese carrying ... 
Physics Please help!
If it requires 5.5J of work to stretch a particular spring by 2.3cm from its equilibrium length, how much more work will be required to stretch it an additional 4.5cm ? Express your answer using two significant figures. W=_____ J? 
math
I have no idea how to do these please help(: evaluate each of the following 1. 81^1/4 (81 to the negative power of one fourth) 2. 125^2/3 3. 64^3/2 4. 4^3/2 answers and work please 
math
I have no idea how to do these please help(: evaluate each of the following 1. 81^1/4 (81 to the negative power of one fourth) 2. 125^2/3 3. 64^3/2 4. 4^3/2 answers and work please 
Maths Please help
How do i work out the mass of a flywheel. I am given the density as 7500kg/m3, a 500mm diameter and a 10cm thickness. Please help 
math please help
The perimeter of a rectangular field is 380 yd. The length is 10 yd longer than the width. Find the dimensions. Please help and show work thank you 
maths
A fraction a / b can be expressed as a terminating decimal if b has no prime factors other than A) 2, 3 B) 3, 5 C) 2,5 D) 2,3,5 Please choose from the option and please show your work. 
Math (please check)
Compute the indicated derivative. d/dt [ ( t^2 + t^0.5 ) ( t^0.5  t^0.5 ) ] t=1 I took the f and g prime then I used the quotient rule my final answer came out to 3t^1.5  1.5t^0.5 + t + 0.5t^1 then I plugged 1 in for t and got 5.196 Please let me know if this is right, if... 
Math
Could I please get some help for these 3 questions, apologies for asking so many, but they were the ones I was really unsure of: 1. Find an equation for the line tangent to y=ln(x) and that goes through the origin. I have no idea, the ln(x) stuff is confusing me. 2. derivative... 
trig
(cotxsec2x  cotx)/ (sinxtanx + cosx) = sinx prove. i keep getting (if i start from the left side) = cosx instead of sinx please help! 
trig please
I have no idea how to do this Find the value of the angle theta in degrees rounded to the neartest tenth of a degree. I have no idea were to start... h t t p : / / i m g 6 . i m a g e s h a c k . u s / i m g 6 / 5 8 9 9 / a d s f a s d f a s d f a d s f s a d f . j p g 
trig
solve each equation for è, giving a general formula for all of the solutions: 6. tanè=1 7. sin(è/2)=1/2 Please show step by step on how to solve these. Im not sure on how to do them. Thank you for your help! 
Trig Question
Given that tan x= 3/4 and x is in the second quadrant. Find sin 2x, cos 2x, and tan 2x (Exact, no decimals). Please show stepbystep, thank you! 
math work
a dress orginally sold for $120 is now being sold for $96. by what percent was the prginal price of the dress discounted? please show work. 
Chemistry
Given the balanced equation : 3 CO + 7 H2 > C3H8 + 3 H2O How much C3H8 will be produced if 45.8 g CO reacts with 87.3 H2 ? Please all your work (i did it but im not sure if i did all the work right) 
Geometry
Solve for x. Find the angle measures to check your work. m<AOB = 4x  2 m<BOC = 5x + 10 m<COD = 2x + 14 How do I solve for x? 
Algebra
If y is a positive integer, for how many values of y is 3/2y greater than 1/4 and less than 1/2? F. 0 G.1 H.2 I. 3 J.4 Check this. 1/2>3/2y>1/4 Only 4 and 5 work. Thus, there are 2 values of y. 
math
Solve the equation for n n!/(n2)! = 90 I get n= 10 but when i plug 10 back into the equation i don't get 90 to check... My work: n!/(n2)! =90 n(n1)(n2)/(n2)! =90 i cancelled the n2 and expanded the n(n1) n^2 1n 90 =0 (n10)(n+9) = 0 
Trig
Sin(Xy)sin(x+y)=sin^2 x  sin^2 y work on one side only...so i worked on the right =(sinxsiny)(sinx+siny) does that equal sin(xy)sin(x+y)??? help! 
trig!!
Sin(Xy)sin(x+y)=sin^2 x  sin^2 y work on one side only...so i worked on the right =(sinxsiny)(sinx+siny) does that equal sin(xy)sin(x+y)??? help! 
English
1. What can robots do? They can do many things for us. 2. What does Albert Hubo like? He looks like a real person. 3. What can Albert Hubo do? He can walk, talk, laugh, cry, and shake hands. 4. Where does HiRobo work? He works at a car factory. 5. What can HiRobo do? He can ... 
Math/Trig
From an observation tower that overlooks a runway, the angles of depression of point A, on one side of the runway, and point B, on the opposite side of the runway are 6 degrees and 13 degrees respectively. The points and the tower are in the same vertical plane and the ... 
English
Posted by rfvv on Sunday, April 14, 2013 at 3:50pm. 1. He is riding a roller board. 2. He is in the air on the roller board with his arms spread in the picture. 3. Talk with your partner and check the Yes box if your partner likies the activity. If your partner doesn't like ... 
Math 8R: Homework Check  Part 2
Part 2: Simplify by combining like terms and using the distributive property 11. 3x + 5x Answer: 8x 12. 3x + 5y  2x + 8, Answer: 1x + 5y + 8 13. 9 + 5m + 6b  2m  4, Answer: 3m + 5 + 6b 14. 3ab + 6c  ab + 10  2c, Answer: 2ab + 4c + 10 15. 6(m+3), Answer: 6m + 18 16. 8(x2... 
Grammar check
Hello, can you please check my answer. Which of the following sentences is written in the subjunctive mood? A. If the sun is shining, then I will wear sandals. B. It was the weekend, so she slept until noon. C. My health teacher recommends that I eat five servings of ... 
Health care please check answer
Please check my answer thank you :) A patient visits the doctor's office with abdominal pain of two days' duration. Medical history is significant for tonsillectomy and hypertension. The patient denies alcohol and drug abuse. The rectal exam confirms hemenegative stool. ... 
math  pls check my work!
help pls asap!!! Check my work! 1. Find the area for the following figure. (trapazoid: bottom base 16.3, top base 5.9, height 4.6) 51.06 m^2*** 74.98 m^2 27.14 m^2 102.12 m^2 2. Find the area for the following figure. (1 point) (triangle: base 20.3, height 6.2) 125.86 cm^2 62.... 
Chemistry  Bob Pursley
Posted by Sarah H on Friday, May 23, 2008 at 8:10pm. Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 > 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87... 
PreCalcPlease check my answer
Please helpI'm stuck really bad Thank you for any help you can provide What are the roots of the equation x^2 4x + 3 = 0 x^2  4x = 3 x^2 +2(2)x + 2^2 = 3 = 2^2 x^2 + 4x + 4 = 1 (x + 2)^2 = 1 qrt (x+2)^2 = sqrt 1 x+2 = plus or minus 1 therefore x=1 x=3 roots are 1 and 3 
Language(asap answers please!!!)
Which section of a personal narrative requires the most development? a. introduction b. conclusion c. character introduction d. plot My answer: D. Please check! 
Math check my answer
77 is what percent of 192? A. x/100= 77/192;4.01% B. x/100=77/192; 40.1% C. x/77= 100/192; 77.3% D. x/100= 192/77; 249.4% My answer is B. Please help and check my answer if I am wrong please correct me thank you. 
Physics  Grade 10
Grant stands 3 meters from the check out at the grocery store holding a 20N bag of potatoes for 10 minutes. How much work does he perform? 
Chemistry (URGENT)
I have a test soon. If you can help me with these questions, that would be great. 1. Define and describe the following. a)Alkaline  metal  base b)Corrosive  burn/eat away  acid c)Caustic  harsh  both? (acid + base) d)Low pH  06.99  acid Please check my answers and ... 
Trig
Find an equation for the hyperbola described. Foci at (4,0) and (4,0); asymptote the line y= x. Please explain the steps of this problem. My book does not get an example of this type of problem and I'm not having any luck working this problem. 
SUVs and Cars (Math)
In a parking lot, the # of ordinary cars is larger than the # of sports utility vehicles. by 94.7%. The difference btwn the # of cars and the # of SUV's is 18. Find the # of SUV's. ~My thoughts and work: C= Cars # S= SUV # CS= 18 (C/S)*100= 94.7% Can I replace the C with the ... 
PreCalc/Trig
Please helpI'm stuck really bad What are the roots of the equation x^2  4x + 3 = 0 I think I was suppose to use b^2  4ac so it would be 4  (4)*1*3 = 12 so the roots would be 12 and 12 Thank you for any help you can provide 
Physics
Nicole is late for work. She jumps in her car and drives to work in 3.5 minutes. Her work place is 3.85 km away from her house. The speed limit between home and work is 50 km/hour. Is Nicole speeding? 
trig
Verify the identity sin 3x cos 3x = 1/2 sin 6x can you show step by step please 
Math
Each of the following objects have been measured with inappropriate units. Convert them to more suitable units. (Please check my work and see if the units are correct for the situation?) a) The thickness of a dime is 0.00122m 0.00122m*100cm/1m = 0.122cm b) The height of a ... 
Electromagnetic inductioncheck answers
Please check my answers: why does an iron core increase the magnetic iduction of a coil of wire? I am thinking it has something to do with the voltage being increased. Will a cyclist coast farther if the lamp is connected to the generator on his bicycle is turned off? I say ... 
AP Chemistry
What is ksp for lithium carbonate? I got an answer of 2.40 x 10^4 but i need to check that answer with somebody who can work this out 
math algerbra
i need help finding how to check my work i would appreciate it very much if somone would help me 
english
Can someone check my work PLEASE.. Which of the following is not a strategy for revising your paper? Check for redundant language. Remove overly complicated language. Get rid of euphemisms and clichés. None of the above (my choice) Choose the correct word to complete the ... 
Trig
Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point. I have 3 other problems like this and i have no clue how to do them. can someone help please? 
algebra2/ trig
The figure at the right shows three circular pipes all with 12inch diameters the have been strapped together by a metal band.What is the lenght of the band? I don't even know where to start , please help? 
Physics
I have no idea how to do this. Anyone help? A cyclist passes a race check point at +5.5m/s and then accelerates ata constant rate of +.55 m/s^2. The cyclist forgot to check in at the check point, and after 20s turns back around to head back. How far did the cylist move from ... 
Algebra 2 URGENT PLEASE HELP
find an equation of the linear function f using the given information. please show all steps and work f(1)=1, f(1)= 2 
Chemistry
I..don't understand any of this: 43. How many moles are in 25.0 grams of potassium? Show your work and round your answer to the appropriate number of significant figures. Please, please help with this! Thanks MC 
Math PLEASE HELP
Please finish these questions so I can check my answers. All my answers are at the bottom. Adding and subtracting mixed numbers. Please finish these questions. The answer must be reduced to lowest terms! 1. 3 2/5 + 6 1/5= 2. 4 2/5 + 1/10= 3. 2 3/12 + 2 3/6= 4. 5 3/9 + 2 1/3= 5... 
Physics
Would someone please check my work ands let me know if I am right? (We are going to do this as a group but I'd like to attempt it on my own first.) Thank you! Suppose a soccer player kicks the ball from a distance 30 m toward the goal. Find the initial speed of the ball if it ... 
English
Could you please check this dialogue and tell me if the expressions are commonly used in American English? Would you have written them differently= 1.How are things with you? Any news? 2.We’ve moved house. 3.Where did you move to? 4.We moved to Villiers Terrace, just round ... 
English
What will happen in the future? We will fly to the USA in an hour. We will visit Mars. We will go to the moon with our family. We will travel to many planets without paying a lot of money. We will live on Jupitor. We will live on another planet. We will live for more than 200 ... 
essay check please
This is the introduction of my essay , please check it !!!!!!!!!!!! It would really help “All men are born equally free”Salmon P. Chase. A very important character that shapes our society is equality, but many people don’t believe in it. Racism and discrimination are ... 
math133
) Solve algebraically and check your potential solutions: sqrtx+2+0 Answer: Show your work here: 3) The volume of a cube is given by V = s3, where s is the length of a side. Find the length of a side of a cube if the volume is 800 cm3. Round the answer to three decimal places... 
7th grade math Ms. Sue please help I have no idea!
#10 On a blueprint, 1 inch = 13 feet. If the dimensions of the playroom on the blueprint are 0.35 inches x 1.25 inches, what are its actual measurements? * *Show all your work for full credit* #11 The coordinate of rectangle ABCD are given. Find the coordinates of its image ... 
MathTrig
Trig Questions 1. Write the algebraic expression which shows Cos((ArcSin(4/X)), 2. Angle If Csc(Θ)=15/4? 2.  what quadrant is it in, find the sin(Θ), Sin(Θ), Tan(90degΘ), Tan(Θ), csc(Θ), Sec(Θ+360deg), Thanks 
Math  Solving Trig Equations
Solve each equation for o is less than and/or equal to theta is less than and/or equal to 360  sin^2x = 1 = cos^2x  Work: cos^2x  cos^2x = 0 0 = 0  Textbook Answers: 90 and 270  Btw, how would you isolate for cos^2x = 0? Would it be... x = cos^1 square root of _____ ? 
Math/Trig
The average temperature, in °F, for Atlanta, GA is modeled by the sinusoidal function y = 18.25 sin(pi/6 t  2.09) + 61.15 where t is the time in months and January is t = 1. What is the average temperature for the month of February? How do I do this problem ? Please Help 
English
1. Do you do any volunteer work? How about your friends? 2. Yes, I do. They do volunteer work, too. 3. No, I don't. They don't do volunteer work, either. (Are the answers grammatical?) 4. Do you do any volunteer work? 5. Are you doing any volunteer work? (Which question is ... 
francais
Please can you check my work so far. we have to fill in the gaps. my answers are in '..'. i have no idea what is supposed to go in the gaps my teacher says some answers would be better than others please could you help. Je ne mange jamais 'le porc' parce que c'est défendu aux... 
Simplify
Simplify the following number. ∛729 I think it is ∛9, but I do not know. Please help, and check my answer. I will appreciate it if you guys can answer this as soon as possible. It is part of a RATIONAL EXPONENTS question. The original equation was 9^(1/3)∙&#... 
Chemistry
Check my work & answer please. I need to make sure I am able to do this type of problem correctly. A typical car engine produces 44,000 kJ of heat in an hour. The cooling system has a capacity of 8.40 L and is filled with a 50:50 mixture of antifreeze (specific heat capacity ... 
math***CHECK ANSWER***
please check this one answer. 3.everyone in andy's class has to do a science project. Out of the 20 students,80% have completed their project.how many students still need to finish their projects? A.100 students B. 36 students C. 16 students D. 4 students (I PICK THIS) 
math (check answer plz)
Carol has a collection of 100 stamps the graph below shows the percentage of stamps she has from each country how many more of Carols stamps are from france than from england? France: 24%, England:22%, Norway:29%, Italy:25... 
English
1. I am good at mimicking others. I want to mimick President No Muhyeon for the elderly people. 2. I am good at walking on my hands. I want to walk on my hands to surprise the elderly people. 3. I am good at doing hard work. I want to carry heavy things for the club members ... 
math
please check my answer thanks :) What is Eric's gross pay , including overtime and double time He earns $9.24 per hour He gets time and a half for over time and double time for work on Saturday He worked 52 hours this week, with 8 hours overtime and for hours on Saturday $9.24... 
Liberal Arts Math
show work simplify:(a9b)(a+3c) (a9b)(a+3c) a^2+3ca9ba9bc I'm pretty sure this is how you do it... plz check some standard formula to remember are; i: (a+b)^2=(a+b)(a+b)= a^2+2ab+b^2 ii: (ab)^2=(ab)(ab)=a^22abb^2 iii: (a+b)(ab)= a^2b^2 look at the patern and work out... 
College English
Compare and contrast Azar Nafisi's "Reading Lolita in tehran" work to Frederick Douglass " Learning to Read and Write" work. I've read both but I'm not sure what to write for contrast. They both Had No freedom, social obligations and Strived for Education. I need to Write an ... 
Physics
Does centripetal force acting on an object in uniform circular motion do work on the object? For work, force must be in the direction of movement. Please stop posting under differing names. 
sociology
i just got this course today, i started on it, please check over my work: 1. Sociologist who believed that the economy influences the social structure.(Karl Marx) 2. Theoretical perspective that was influenced by the work of Max Weber. 3. Positive consequence an element has ... 
math/trig
A ship sailed on a bearing 140 degrees. It was then 90 km south of its orignal position. a) draw a diagram to show the ship's journey b) how far east of its original position is it? what ratio would i need? (sine,cosine or tangent) i know that all trig questions have a right... 
English
Hello. Will you please tell me if the following word order is possible in English: "She sometimes (?) doesn't go to work" or is it "Sometimes she doesn't go to work"? Thank you for help. 
Trig Identities
Prove the following identities: 13. tan(x) + sec(x) = (cos(x)) / (1sin(x)) *Sorry for any confusing parenthesis.* My work: I simplified the left side to a. ((sinx) / (cosx)) + (1 / cosx) , then b. (sinx + 1) / cosx = (cos(x)) / (1sin(x)) I don't know how to verify the rest. 
Chemistry(Please check)
. Ksp for Fe(IO3)3 is 1014. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 104M and [IO3] = 105M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would you agree? ... 
mathsword problem help
A and B can finish a piece of work in 12days and 18days respectively. A begin to the work and they work alternately one at a time for one day each.The whole work will be completed in? Help me plz show step thanks 
I have posted this so many times..can someone help
I need someone to right an introduction to an essay in which you saying that the meaning of the quote bellow is true: "and tuhs the whirigig of time brings back his revenges." I may not be the one to write this but I don't want to see your question go unanswered. This web site... 
pre calc
Can someone please help me f(x)=1/3 square root 12x and g(x)= (x2)/x. Find and simplify (g of g)(3)/(g of f)(24). The answer I got it 24/7 and i Am unsure If it is correct. Please show all work Thank you 
Check my american gov. work
The group that has the sole power to begin impeachment hearings is A. Senate B. Supreme Court C. House of Representatives D. The president's Cabinet Answer: A 
Math
Can someone check my work? the problem is: x=2+3/y and I have to solve for y I get rid of the denominator y and multiply it with X...so it looks like xy=5 then just divide by x on both sides for a final answer of y=5/x 
physics
(a) A truck of mass 1870 kg travelling at 80 km/h braked to 55 km/h then continued at that speed. How much work was done by the brakes during that period? I just wanted to check my answer... 243334 J ?? 
Physics
(a) A truck of mass 1870 kg travelling at 80 km/h braked to 55 km/h then continued at that speed. How much work was done by the brakes during that period? I just wanted to check my answer... 243334 J ?? 
PreCalculus (PLEASE HELP, IM BEGGING!)
Can anyone please explain these problems to me?? I really need help!I need to simplify these trig expressions but I don't understand how my teacher is doing it at all and I have a quiz on this tomorrow! I've really been trying but I just don't get it! 1)Mulitply: [cosx/(1cosx... 
Math
Check answer PLEASE!! Kevin wants to calculate the value of the expression below. 17 + 3 Which shows an equivalent way kevin could write this expression? (A.) (17 + 3) B. (17  3) C. (3 + 17) D. (3  17) Please help as soon as possible!! I have no one to help me and i don... 
chem can u check answer please
the solubility of silver sulfate in water is 0.223%(w/v) at 35 degrees celsius.calculate the solubility product of this salt at this temp. I got 1.46 X 10^6 M is this right please thanks Andy 
Math
1. Which equation below matches the relationship shown in the table? Table X: 0, 1, 2 Y: 0.5,3.5, 6.5 A. y=2x+0.5 B. y=2x+2 C. y=3x D. y=3x+0.5 Please help, thank you. BTW I would share my answer for anyone to check but I am not sure how to do this so please give the process... 
Math
7k divided by 3=21 Can you please show me the work? I know that k=9 but I don't know how to show the work.