Trig check my work please?
90,505 results, page 92

Math Help
Hello! Can someone please check and see if I did this right? Thanks! :) Directions: Find the exact solutions of the equation in the interval [0,2pi] cos2x+sinx=0 My answer: cos2x+sinx=cos^2xsin^2x+sinx =1sin^2xsin^2x+sinx =2sin^2x+sinx+1=0 
physics/ conversions
Please check these problems. 1. 92 X 10^3 km > dm My answer: 9.2 X 10^8 dm 2. 5.52 X 10^8 g > kg My answer: 5.52 X 10^11 kg 3. 8.66 X 10^9 m > mm My answer: 8.66 X 10^12 mm 4. 1 um > m My answer: 1 X 10^6 m Thanks. 1 and 4 are correct. No so for 2 ... 
bio check my answers pretty please?
If purple flower color is dominant and red flower color recessive, how many phenotypes are possible in offspring of homozygous purple crossed with homozygous red? 1 2 3 4 I put 1. 
Science  Check my answers please (6th grade)
earth and the moon are kept in their respective orbits due to the influence of ? a) inertia b) gravity c) both inertia and gravity d) neither inertia and gravity Is it c) both inertia and gravity? 
Math
The of the 45 numbers is 9.the average of the first 20 is 10 and the average of the last 24 is 8.find the 21st number. I have solved please check this. 9=x/45 ,so x=415. 10=x/20, x=200 and 8=x/24, x=192 So,415(200+192)=23.answer Is this way and answer correct? 
chemistry(check my answers please)
1)An increase in temperature ____________ the kinetic energy and average speed of the gas particles. A. decreases B. increases 2)As a result, the pressure on the walls of the container __________. A. decreases B. increases C. is not affected 1) i think its increase 2)i think ... 
English
Could you please check these sentences? Thank you. 1) We're looking for a high school in which subjects such as biology or geography are taught in English so that in the future our students could carry out a project on a common theme in English. 2) I really hope your school is... 
E.L.A. PLEASE CHECK!
Which choice best describes the underlined words in this sentence? Red and a strange shade of green were the only colors available. Underlined is: Red _____ shade A simple subject B complete subject C compound subject D none of the above I think it is D. 
English grammar.
Please check my answer! What is the capitalized phrase? TO SCORE ACCURATELY, bowlers must learn what the terms spare, strike, and split mean. Infinitive phrase**** Gerund phrase Adverb phrase none of the above I though that the capitalized phrase was an infinitive phrase. 
English
1. Raise your left arm over your head. 2. Bend the left elbow and touch the middle of the upper back with your fingers. 3. Hold the left elbow with the right hand and pull back. 4. Hold for 10 to 30 seconds.  Are the directions all grammatical? Check them, ... 
physics
please check my answers what are the SI units for momentum? kg*m/s which of the following is not involved in hitting a tennis ball? a. kinetic energy b. chemical potential energy c. gravitational potential energy d. elastic potential energy i picked B How much power is ... 
English
Traveling to Fukuoka About ten years ago, I went to Fukuoka, Japan. I went there by ship. In Fukuoka, I visited a bookstore. It was important to buy English books there at that time. I always feel great twhen I look at this picture. (Would you check this writing? Correct ... 
Algebra 2
Can someone please check my answers? Find the probability of drawing the given cards from a standard dick of 52 cards (a) with replacement and (b) without replacement. 1.A red card, then a black card a. 1/4 b. 13/51 2.A ten, then the ace of hearts a. 1/676 b. 1/663 3.A face ... 
spanish
please check this: "Te banas por la noche o por la manana?" "Generlamente, yo _____ por la manana." a. me bano b. me bana c. te bano d. te banas i think A..? 
bio check plz plz plz
in human (2n=46) mitosis result 2 cell with 23 chromoses and meosis result in (n=23) 4 cell with 46 chromoses... is this statment true ? please help me .... 
Bio
The binding of alanine to tRNAala is mediated by the enzyme...... a. aminoacyletRAN SYNTHSE b. aminotRAN SYNTHSE c. aminoacyletRAN synhetase d. aminotRAN syntase I think the right answer is c, but not sure. Please check 
re:english...help
w w w (dot) sunnyd (dot) com / # / ads i don't know does the two sunny D ads are bandwagon. i think they are because they're smiling like they like sunny d but i could be wrong. can u check to make sure is it bandwagon or not. i really appreciate it please help and thank you 
To Sam: Penn Foster answers
Please do not post any more answers. Jiskha is not a repository for any exam answers. In addition, we have no idea what the questions are. If you want to post a couple of your exam questions along with your answers, we'll be glad to check them for you. 
Math
Write the algebraic expressions for the following. Please check and correct me if I'm wrong!! 1. 3 less than 5 times a number. Answer: 5x3 2. 18 fewer than half a number. Answer: 1/2x18 3. 3 more than the quotient of a number and 2. Answer: x/2+3 4. 4 times the difference of... 
Social Studies (Check, Please!)
Why did Roosevelt win an unprecedented third term in office? A: Roosevelt won an unprecedented third term in office because the voters preferred to stick with a president they knew during this crisis period. 
Math
1. Three student share 5 peaches equally. How many peaches does each student get? Answer: 1 2/3 2. Six friends share 4 sandwiches equally. What fraction of a sandwich does each friend get? Answer: 2/3 Please check the above two answers. Thank you 
Math please check my answer?
1)6x+11y=30 A) xintercept= (24,0);y intercept =(0,19) B)xintercept=(0,1/5);y intercept=(11/30,0)<<<< C)xintercept= (5,0);y intercept=(0,30/11) D)xintercept= (24,0);y intercept=(0,19) 
Math
Which of the following expressions is true? A. 4^3 * 4^5 <4^12 B. 5^2 *5^4 =5^8 C. 5^2 *5^3 >5^5 *** D. 3^2 * 3^4 = 3^2 Which of the following expressions is true? A. 8^3 *8^2 <8^4 B. 4^4 * 4^4 =4^16 C. 3^3 * 3^3 >3^5 D. 2^2 * 2^6 <2^8 *** please check 
Art
Please can someone name an artist who bases their art work theme on 'good and bad' or 'good and evil'. And an artist who uses colour to show emotions? Thankyou! 
MATH
if the minimum cost is $608.50 how many barrels are extracted in order to meet the minimum cost. C=9x2144x+608.50 this is a quadratic relation that 2 is a exponet. please show your work 
Calculus
Consider the function f(x)=xe^2x. Find the intervals on which f(x) is concave up and the intervals where it is concave down. Show a sign graph. Please show work in detail so I can follow for future reference. Thanks! 
math
i put 4000.00 in savings. at end of 3 years the account earned 960.00 in simple interest at what simple interest rate did the account grow? please show me the work. 
Math
36. A clock gains 20 minutes each day. if the correct time is indicated now , in how many days will it again show the first correct time? Please show work/explain A.8 B.18 C.20 D.36 E.72 
math
5.If inequalities are multiplied by positive number, the order remains the same. If x>y and z>0, then xz>yz. However, if inequalities are multiplied by negative numbers the order is reversed. If x>y and z<0 then xz<yz Please show work and explain. 
math
Janelle has $20 and is saving $6 per week. April has $150 and is spending $4 per week. When will they both have have the same amount of money? please show work, 
Maths
Here is a list of what you need to make 20 buns:  100g butter  150g flour  200g sugar  4 eggs Work out what you need to make 30 buns Please help. Thank you x 
English
Why do you save money? 1. I save money to buy a fancy bike. 2. I save money to buy the MS Office program. 3. I save money to buy a Samsung galaxy 5. 4. I save money to please my parents, for they like me to save money. 5. I save money to buy a new coat. 6. I save money to ... 
Chemistry
This is for oxidation numbers. I need to know how to show my work. Ex: for NaClO, I have to find the oxidation number for Cl I showed my work. NaClO +1+x+(2)=0 +1+x2=0 x2=1 x=1+2 x=+1 Therefore, the oxidation number for chlorine in NaClO is +1. Cl^ I know that the ... 
English
Could you please check these sentences, please? Thank you. 1) Jane Austen appeared on the literary scene with her novel of manners based on the premise (synonym?) that there is (was?) a vital relationship between manners, social behavior and character. 2) They are usually set ... 
TO Pallavi, CELINA, SWETA, katrina, nikita:
Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a tutor with this specialty online right now, be sure to go back into your textbook or use a good search engine... 
Physics
In Figure 1020, the magnitude of the force necessary to stretch a spring is plotted against the distance the spring is stretched. Figure 1020 (a) Calculate the slope of the graph, k, and show that F = kd, where k = 25 N/m. (b) Find the amount of work done in stretching the ... 
Trigonometry (Help and Check)
Evaluate (exact answers): a) sin^1(cos30) Need help. What do I do? b) sin[(cos^1((sqrt2)/(2)))+[(sin^1((sqrt2)/(2)))] = sin(45+45) = sin90 = 1 Is this correct? c) cos(arctan5/7) = 7/(sqrt74) = (7sqrt74)/74 Is this correct? Please and Thank you! 
Algebra
Doing a slope project in Algebra. The instructions are to make a picture And label coordinates points.. You have to show a negative slope. A verticle slope, an undefined slope, And a positive slope. Here is my problem. I have to write An equation and show my work for the ... 
Physics  Please Check Answers ASAP
Please check these over and see if any are incorrect? 1. The units of speed are: a) m/s > my answer b) m/s^2 and direction c) N d) m/s and direction 2. Which of Newton's Laws says you cannot touch anything without being touched? a) 4th b) 2nd c) 1st d) 3rd > my ... 
science
this is the 40th year that man has landed on the moon. what progress has been attained since man landed on the moon? please please please please please please hElP 
trig
Both circles have the same center and radius of the larger cirlce is R. if the radius of the msaller circle is 3 units less than R, whic of the following represent the area of the shaded region? 
Trig
There is a right triangle with a left side of six, a bottom side of 10, and a hypoteneuse 11.66. How do you find the other two angles? I tried the inverse of tangent 6/11.66, but my calculator said that's invalid. What do you properly do? 
Math/Trig
Given A=56degrees, C=61degrees, and b=10.5, solve triangle ABC. If no triangle exists, explain why. If two solutions exist, write both. Round your answer to the nearest tenth 
Math/Trig
Given A=56degrees, C=61degrees, and b=10.5, solve triangle ABC. If no triangle exists, explain why. If two solutions exist, write both. Round your answer to the nearest tenth 
trig
A tree casts a shadow 50 yards long when the angle of the sun (measured from the horizon) is 30 degree. How tall is the tree in feet? (A) 150p3 (B) 50p3 (C) 150 (D) 75p3 (E) None of the above. 
trig
Consider the angle in standard position whose measure is radians. The terminal side of this angle is in the third quadrant and lies on the line given by y=10x. Find sin and cos. 
trig
fidn all values of tehta in [0, 360) that satisfy the equation. √(3)tan(θ/2)=1 I have four choices 300, 330, 150 , 120 and i got 120 
trig
Two ships leave port at the same time and travel straight line distances, the first at 30 km/h and the second at 10 km/h. Two hours later they are 50 km apart. What is the angle between their courses? 
Math  Domain of Composite function
Find the domain of the composite function f ₒ g . Please show all of your work. f(x) = √x; g(x) = 2x + 12 
math
Write the slopeintercept equation for the line with slope 2/3 and yintercept (0, 3) and graph the line. Please show all of your work. ( 
Math
Allison measures 1 5/16 teaspoons of salt. She measures another 1 11/16 teaspoons of salt. How many tablespoons does she measure altogether? Please show work 
Math
Please help me with this home work Triangle ABC ~ Triangle ADE AD=5; DB=3.5; BC=5.1; AE=6; EC=x What is the length of AB? What is the length of DE? Write an expression that represents AC? What is the length of EC? What is the length of AC? Thank you 
algebra
a bank has 2 checking plans. the anywhere plan charges 15 cents per check. accucheck costs 1.65 a mont, plus 4 cents per check. what # of checks will accucheck plan cost less than anywhere plan? 
Calculus (Help)
Can you please help me with this problem? I asked earlier, but nobody was able to help me... I've been working on it for about an hour now. A widget factory has fixed costs of 35 billion dollars and variable costs of 781 million dollars per widget. The revenue (in $ billions) ... 
(Arts/Theater)(Stuck on what to do) Help please?
My improvisation teacher today told us to bring something with us to class where you can do a physical action with it. This action must be something you can do in barely 10 minutes and must have an actual ending to that action. We're doing this assignment tomorrow and I have ... 
Calculus, Riemann Sums
Measurements of a lake’s width were taken at 15foot intervals, as shown: x= 0 15 30 45 60 75 90 105 120 f(x)= 0 15 18 20 19 23 24 22 12 Estimate integral (0,120) f(x) dx with n = 4, using Midpoint approximation. For this question, I ended up with 7200 but compared to the ... 
Math (Riemann Sums)
Measurements of a lake’s width were taken at 15foot intervals, as shown: x= 0 15 30 45 60 75 90 105 120 f(x)= 0 15 18 20 19 23 24 22 12 Estimate integral (0,120) f(x) dx with n = 4, using Midpoint approximation. For this question, I ended up with 7200 but compared to the ... 
physics
The concepts in this problem are similar to those in MultipleConcept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 89.2kg person straight up by means of a cable. The person has an upward acceleration ... 
algebra
Help Fast PLEASE!! check for corrections on my problems 1.Rewrte the following in simplified radical form, Assume all variables represents positive real numbers: square root 48y^10= 4y^5 square root 3 2.Rationalize the denomintor and simplify: square root33/square root 21= ... 
Science
Acetylene gas c2h2 reaction cac2+2h2o. C2h2+Ca(oh)2 how many moles of cac2 needed to prepare 10.0 g c2h2 please show work and answer soon final question on big test review 
Physics
A rock is thrown straight up at 22.0 m/s from a roof of a 30.0 m tall building. After rising, the rock falls on the street below. Ignoring air resistance, how much time is the rock in the air? Show the work please :) 
english
correct any errors. Please check my answers. Question: 12) Every player on the team, must give their best effort in the championship game. Every player on the team, must give his or her best effort in the championship game. Question: 13) Each person in the seminar must submit ... 
math/algebra
Simplify: 3/4/4/5 answer choices are: a) 3/5 b) 5/3 C) 15/16 d)16/15 How do I go about solving this fraction, please show me how to work this. 3/4 divided by 4/5 1. Invert the second fraction. 3/4 / 5/4 2. Multiply the numerators and denominators. What answer do you get? 15/16... 
Math 116 Axia
rewrite using multiplication 70/(23) Do not simplify, Type a fraction I can multiply and divide but I am not sure how to work the problem. can someone do a problem with the same type of values so I can see the steps involved? Please and thank you! possible sample 50/(13) 
Chemistry
a piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25L. at the same time, 45J of heat is transferred from the surroundings to the system. Against what pressure was the piston working? Please Explain! 
Chemistry
a piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25L. at the same time, 45J of heat is transferred from the surroundings to the system. Against what pressure was the piston working? Please Explain! 
Algebra
A manufacture of CD player has monthly fixed cost of 8600 and variable cost of 55 per unit for one particular model. The company sells this model to dealers for 115 each. Which is their function for the profit. Please show all work. 
Math
The distance s in feet that a body falls in t seconds is given by the formula s=16t^2. If a body has been falling for 5 seconds, how far will it fall during the 6th second? Please show work/explain A. 16 ft. B. 80 ft. C. 176 ft. D. 400 ft. E. 576 ft. 
Calculus AB
Please help I'm stuck on this problem for the past hour. Define f(x)= { Ln lx1l }/x A) show that f(c) is continuous at x=2 B)Where on the interval [2,2] is f discontinuous? Show the work that leads to your conclusion. C) classify the discontinuities in part b) as removable ... 
algebra
The following stemandleaf plot values show the average monthly sales commissions (in hundreds of dollars)for a major co rporation's nationwide sales group: 27,27,29,33,38,44,44,44,46,50,58. What is the mean of the distribution? Please show as much work as possible. Thank You. 
math check
Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population is lefthanded. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are lefthanded. Incorrect: 9.936 (b) Compute ... 
Biology
I know it is a bit long and maybe difficult, please help me to answer these.. 1) I have pET28a with insert inside. Insert is 400 bp in size. I want to check my insert with both single digestion and double digestion. I already isolated my plasmid but i do not know the next step... 
AP World History Please Help Me Mrs.Sue
Compare the political structure of Hellenistic Greece to that of the Greek world before 400 B.C.E. What was the function of philosophy in Greek culture? What, according to the authors, were the principles of Greek culture? Define a polis. How did the polis change between 800 ... 
Trig
Special Angles And their Measures Fill out the Table Below: in degrees Sin Cos Tan 0 30 45 60 90 120 135 150 180 210 225 240 270 300 315 330 
trig
Matt has a large family when looking at the dates of their birthdays, he noticed that every prime day had at least one birthday. this was also true for perfect squares cubes and multiples of 3,5,7, and 11. what days (1 to 31) are not represented 
7 th grade math
You check 20 batteries.Fourteen do not have a charge. Part a. What is the experimental probability that the next battery you check does not have a charge? Part B. Select an answer from each box to make the statement true If 300,100,240 batteries are tested I would expect 30,... 
Trig
Simplify:::: sin (teta) cot (teta) = cos (teta) 
trig
Find theta such as tan(theta) = cot(theta+45). Thanks 
trig
tan theta= 4/3 and sec theta<0 find sin (theta = pi/6) 
trig
find the exact value of sin(u+v) given that sin u=3/5 and sin v= 15/17 
trig
If sin(θ) = 8/17 and θ terminates in QI, find cos(θ) 
Trig
Cosine theta=8/17 and 270 degrees is < theta, and theta is< 360 
PreCalc
Could somebody please check this for me? Dtermine whether the graph of each equation is symmetric with respect to the origin, the xaxis, the yaxis, and the line y=x or the line y=x. I came up with the line being symmetric to the xaxis, the yaxis, and the line y=x. I'm not... 
English
Can you please check these sentences? Thank you. When I was "little" (young is better) could play the guitar quite well. Can you say "yesterday evening" in British English (instead of last evening?) He insisted that he hedn't broken the vase. He insisted on not having broken ... 
Science 8th grade/report please check
Please check this for me and let me know what you think. I need to write at least one paragraph on this... A 52 year old man suffers a pulmonary embolism that orignated as a blood clot in his right leg. Describe this condition and how it develops. Trace the pathway of th blood... 
physics
A 1.5 kg snowball is fired from a cliff 12.5m high with an inital velocity of 14 m/s directed 41 degrees above the horizontal. a) how much work is done on the snowball by the gravitaitonal force during its flight to the flat ground below the cliff? b) what is the change in the... 
physics
Four point charges are located at the corners of a square with sides of length a. Two of the charges are +q, and two are q. Find the magnitude and direction of the net electric force exerted on a charge +Q, located at the center of the square, for each of the following ... 
French Check Ms. Sue
Please check this. Thank you! 1. France is a country in Asia. true false*** 2. There are many countries in Africa where French is one of the principal languages of the people. true false 3. Québec, in Canada, is a French speaking part of Canada. true*** false 4. The French ... 
Thermochemistry
Path A A sample of gas in a cylinder of volume 3.96 L at 327 K and 3.28 atm expands to 7.34 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J. Path B Path B has two steps. In the first step, the gas ... 
Calculus Help and Check
1)Find the most general antiderivative of the function. (Check your answer by differentiation. Use C for the constant of the antiderivative. Remember to use ln u where appropriate.) f(x) = (1/5)−(3/x) > (x/5)3lnx+C 2)Find f. f ''(x) = 4 + 6x + 36x^2, f(0... 
Math
1. Write the equation rule and find the twentieth term in the sequence: 1/2,2/3, 3/4, 4/5... My answer: The rule is x/x+1. The twentieth term in the sequence is 20/21. Please check my answer and tell me if it's correct or incorrect. I'm confused. Thanks. 
Math
Molly has 15 marbles in a jar. What is the ratio of black to white marbles? There are 8 black marbles and 7 white marbles. A. 7:8 B. 7:15 C. 8:7 D. 8:15 My answer would be C Can you please double check my answer and tell me if I am right or wrong. 
PLEASE CHECK
1.)Solve for y in the following system of equations. x + 4y = 38 x  6y = 58 My answer 1.) 10 2.) 6 3.) 12 4.) 10 2.)Solve for y in the following system of equations. x  10y = 50 4x + 6y = 4 1.) 6 2.)3 3.)3 My answer4.)6 
math check please
region Population land area 1000mi^2 Asia 4,028,000,000 17,400 North America 305,000,000 9,400 1. Compare the populations per square mile in asia to the population per square mile in north america A: Asia 231.49mi^2 North America 32.45mi.^2 could some one please let me know if... 
General Chemistry
Given 115 grams of Na2SO4 find: a. the # of moles in sodium sulfate b. the # of moles in sodium ions Please explain all work and fully explain where each # came from. Thanks. 
MATH HELP
Will someone please explain and show how to work this one: How many different whole numbers can be made with the digits 5, 7, 8? For this problem, each different whole number may have 1, 2, or 3 digits and a digit may be repeated. 
reallife step function
So if I wanted to do a stepfunction graph for gas prices, how would that work? I'm a little confused. Could someone give me examples please? That would be so helpful (: Thanks! 
math
Find 10% of $500 and 10% of $300. Since 6% is a little more than half of 10%, what is half of 10% of 500? Add this with 10% of 30, since 8% is close to 10%.Does your answer make sense. Please show work so i can understand 
Algebra
Solve the inequality 1. m  7 < 6 2. x + 4.5 more than or equal to 5.5 3.p + 12 > 9 4. Translate the following statement into an inequality: Five less than a number is at least nine. x  5 more than or equal to 9 Show me how you did the work please? 
biochem
The pKa of butanoic acid is 4.87. A student mixes 120 mL of 0.45 M butanoic acid with 50 mL of 0.3 M NaOH and adds water to give a final volume of 1 L. What is the pH of the final solution? Please show you work.