Calculus (Answer Check)

86,499 results, page 65

Calculus

Find the area cut off by x+y=3 from xy=2. I have proceeded as under: y=x/2. Substituting this value we get x+x/2=3 Or x+x/2-3=0 Or x^2-3x+2=0 Or (x-1)(x-2)=0, hence x=1 and x=2 are the points of intersection of the curve xy=2 and the line x+y=3. Area under curve above X axis ...

Algebra

1. What is the equation for the line that passes through the point (-5,2) and has a slope of 0? Answer-2 2. What is the slope of the line that passes through the points (-2, 4, 15) and (1, 1.24)? Answer- -2.91 3. Write a funciton rule for the table shown x 2 3 4 F(x) 8 27 64 ...

Mathematic

2/(2/3)+3/4/(4/5)= The answer key explains it like this: 2/(2/3)+3/(3/4)+4/(4/5)=2x3/2+3x4/3+4x5/4= 3+4+5=12 *I do not understand how the answer is 12. If 2/5 of (2/3)/(5/6) is divided by 3/10, what is the resulting value? The answer key explains it like this: 2/5((2/3)/(5/6...

Geometry

What is the circumference of the circle if the radius is: 5x-My answer was 57(x)pi. What is the radius if the circumference is: 30x(pi)-My answer was 2x. (x + y)pi -My answer (x+y)/7. What is the length of the arc if: radius=3 degree of measurement of arc=6- My answer was pi/9...

calculus

An ice cube is melting, and the lengths of its sides are decreasing at a rate of 0.4 millimeters per minute. At what rate is the volume of the ice cube decreasing when the lengths of the sides of the cube are equal to 15 millimeters? Give your answer correct to the nearest ...

Business Calculus

As the financial consultant to a classic auto dealership, you estimate that the total value (in dollars) of its collection of 1959 Chevrolets and Fords is given by the formula v = 306,000 + 1,000t2 (t ≥ 5) where t is the number of years from now. You anticipate a ...

geometry

First of all let me apologize if this is the wrong section; this is a review question from a Calculus III class, but it doesn't involve any actual calculus so I posted it here. If I have a sphere with center (2,-10,4) and radius 10 what is: the intersection with the yz plane? ...

cell biology

The production of cAMP directly regulated by two enzyme, ___________ and_______. This former is ___________ a protein, when latter is a _________ protein. a. phospodiesterase (PED),Adenylyl ccyclase(AC), cytosolic, peripheral. b. PDE, AC, peripheral, cytosolic C.Adenylyl ...

Math-- Please check

A package of 16 tea bags costs $2.29. Find the unit price in cents per tea bag. Round to the nearest tenth of a cent. I get 14.3 cent Will you check to make sure I am correct? How do I round it to the nearest tenth? Or is it already rounded to the nearest tenth? Please help! ...

Chemistry

A mass of 0.630 g of NaCl is dissolved in 525 g of water. CAlculate the molality. mass of NaCl= 0.630g mass of H20= 525g molar mass of NaCl= 58.44 This is what i did it keeps telling me the answer is wrong. Convert grams to moles of NaCl 0.630 * 1 mol NaCl/58.44= 0.01078 ...

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/...

Social Studies/American Government

Could you check my answers by the way they have to do with the Missouri State Missouri State Constitution. Missouri State Constitution. 1. What is the Preamble? Answer: The Preamble is the first paragraph of the Constitution, and it states why the Constitution was written. 2. ...

English

Can you please check these sentences? I'm really doubtful about them. Thank you. 1) Look at the timetable on the departure board to see if your flight is delayed or if it is on time. 2) Then go to the check-in desk of the company you are travelling with. 3) I advise you to get...

english

hypothetical syllogisms can have two valid and two invalid structures. The two valid structures are affirming the antecedent or modus ponens and denying the consequent or modus tollens. The two invalid structures or fallacies are denying the antecedent and affirming the ...

Math

Multiple Choice   Choose the best answer. For questions 1–3, rewrite the expression using exponents. 4 × 4 × 4 × 4 × 4 A. 54 B. (My choice) 45 C. 44 ====== 3 × 3 × 3 × 3 A. (My choice) 34 B. 43 C. 35 ===== 10 × 10 × 10 A. 310 B. 101 C. 103 (My choice) ====== For ...

science check plzzzzzzzzzz

if your computer uses 2.5A at 120V, how much will it cost to use the computer for 4 hours a day, seven days a week for two weeks? assume that the cost of electricity is $0.09 for every kWh*h of energy. i solved it like this way could you check of i got it right plzzz?? (C= E* ...

science check plzzzzzzzzzz

if your computer uses 2.5A at 120V, how much will it cost to use the computer for 4 hours a day, seven days a week for two weeks? assume that the cost of electricity is $0.09 for every kWh*h of energy. i solved it like this way could you check of i got it right plzzz?? (C= E* ...

science check plzzzzzzzzzz

if your computer uses 2.5A at 120V, how much will it cost to use the computer for 4 hours a day, seven days a week for two weeks? assume that the cost of electricity is $0.09 for every kWh*h of energy. i solved it like this way could you check of i got it right plzzz?? (C= E* ...

chemistry

hi, Can you please double check to see if i have got this right? Is the empirical formual for oxide of arsenic As2O5? Cheers ;) Arsenic forms two oxides with oxygen. One is As2O5, the other is As2O3. I'm glad you posted today; please tell your friend you were talking with ...

Math(Please answer)

This is the same equation as before just with different numbers. y=yo + (vo sin Q) t - 1/2gt^2 This time the numbers are: 0 = 1.005 + (3.021 sin 30)t - 1/2(9.8)t^2 4.9t^2 - 1.5105 - 1.005 = 0 This is the part where I am stuck. Did I do this correctly? sin 30 = 0.50 X 3.021 = 1...

English-A Raisin in the Sun

In the book A Raisin in the Sun, what does Walter think about George Murchison? Please check my answer: Is this correct: Walter is jealous of George. He's jealous that George has been to New York and he hasn't. He's jealous of George's trendy and impressive clothing, which he ...

Chemistry - please help

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/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...

Chemistry - please help

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/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...

Spanish

Each of the Spanish sentences below is incorrect in either grammar or meaning. Rewrite each sentence correctly 1. El rey que canta está tocando el tambor. The king that used to sing is playing the drum. Can you check my answer: El rey que cantaba está tocando el tambor. 2...

Pre-Calc P lease check

Please check my answers; 1.Which of the folowing is another representation of (-3,pi)? (3,120degree) (3,0 degree)I think it is this one?? ((-3,0 degree) 2.Which is not a representation of (5,150 degree) (-5,-30 degree)I think it is this one? (-5,330 degree) (5,510 degree) 3....

math

how do I solve? 4X -4 = 24 4x - 4 = 24 +4 +4 4x = 28 4x/4 = 28/4 x = 7 to check: 4(7)-4 = 24 28- 4 = 24

Please Check This 2!

p^4-1=(p^2)(p^2+1) Typo? p^4-1=(p^2-1)(p^2+1)

math- check this please

1. 3t<-9=t<-3 2.4m>8=m>2 3.10<-2w 5<w 4.-20>-5c 4>c 5.-27>3z -9>z 6.-7b>42 b>6

Check Work (Math)

1/3 > 6/10

Check my previous post

thanks.

algebra

8x-11 < -27= 8x+11< -27= 8x=ll-27 8x=-16 x=-2 Check this problem.

Algebra

Please check: 2x-1<9= 2x<10=x<5 Thanks

Please check answers

(-2)7=-2^7 -2^5 = -2*-2 = 4 * -2= -8 * -2 = 16 * -2 = -32

math

8x^3+125 (2x)^3+(5)^3 (2x+3)(5x^2-6x+25) check this for me

algebra

x^2-4/X^2+3x+2=(x-2)(x+2)/x(3x+2)=(x-2)/x3 check this problem

math

2/3x+1/x=1/6 2x+3x=1/6 5x=1/6 check problem

math check

How does this c(c-2)-c-1(c+3) come to 3-4c?

Math

2 + m < 2 is m < 0 but how would I check it?

Math

multiply and check (a^2+4)(5a^3-3a-1)

Chemistry: Check

1. The amou

Algebra

Can you check 2z - 3y -8z + y I got : 2z-8z-3y +y = -6z -4y =. -2y

Math 8R - Homework Check

1/8 + 1/2 = 7/10 3/4 + 5/6 = 1 7/12 7/9 + 5/6 = 1 11/18 1/4 + 1/2 = 1 2/6 2/3 + 1/2 = 2

Math 8 - homework qs. check

2x - x = 3 - 1 1x = 2/1 x = 2

alg

sqrt(3x^2)=-18 check:

Pre-algebra

Check? 1. 15-2 35/99 =12 64/99

Math

Pls check (3×8+4^2)-9 24+16 40-9 31 6×(10+6)-6^2 6×16 96-6^2 96-36 60

algebra

Splve and check N =

Math (Check My Steps)

(1)/(2^0) 1/1 = 1

Math

Simplify. ((2-5m)/(m-9))+((4m-5)/(9-m)) Check this: (-9m+7)/(m-9)

Math check

Subtract -28 - (-33)= -61

Math

Please check 15/16 x 2/3 = 5/8

Math

Please check 2/5 + (-7/8) = -6

math

Please check -27=8x-5x -27/3=3x X=-9

Math

5x - 3 = 7x + 11 x=-4 3w -4 = w+8 w =6 Please check. Thanks

Spanish-SraJMcGin please check

1.¿Comó te sentiste ayer? Yo sentí muy bien. 2. ¿Adonde fuiste ayer? Yo fui al cine. 3. ¿Adonde fue tu mama ayer? Mi mama fue a la tienda. 4. ¿Visitaste a tu familia la semana pasada? Sí, yo visité mi familia la semana pasada. 5. . ¿Donde estudiaste ayer? Yo estudié ...

Calculus-Steve

Find the area of the region between the graphs of f(x)=3x+8 and g(x)=x^2 + 2x+2 over [0,2]. I got 34/3. Calculus - Steve ∫[0,2] (x^2+2x+2) dx = 1/3 x^3 + x^2 + 2x [0,2] = 8/3 + 4 + 4 = 32/3 Why are you taking the antiderivative of x^2 +2x+2 when we are trying to find the...

5 QUESTIONS PLZ HELP!

1) which of the following numbers are equivalent to 20%?(Choose all that apply)(only 2) A. o.oo2 B. 1/4 C. 0.20 D. 1/5 2)which of the following numbers are equivalent to 35%?(choose all that apply)(only 2) A. 7/20 B. 6/20 C. 3.5 D. 0.35 3) which of the following numbers are ...

geometry

When I tried answering a problem then looked at the answer in the back of my book, I was confused how to get to the correct answer. The problem is there is a trapezoid on a coordinate plane that is centered at the origin. The coordinates of the points have variables: T(-a,0), ...

Physics

please can u check my answer Here are the questions: 1. A 0.45 kg book is resting on a dessktop 0.64 m high. Calculate the book's potential energy relative to a)the desktop? b)the floor. 2. A 0.636 kg basketball has a potential energy of 19J at the basket. How high is the ball...

Probability (Pre-Calculus)

A class is given a list of eight study problems from which five will be part of an upcoming exam. If a given student knows how to solve six of these problems, find the probability that the student will be able to answer: (a) all five questions on the exam. (b) exactly eight ...

Reading, please quickly check my 2 answers.

The speaker in "Dream Variations" longs to "rest at cool evening," which is an expression of the human need for personal expression a place in the jungle a sense of safety warmth and brightness My answer is D The theme of Countee Cullen's poem "Any Human to Another" is that ...

Algebra

1. Compare the quantity in Column A with the quantity in Column B. Column A slope of y = 2x +2 Column B slope of 2y = 3x +9 Answer-Column A is greater 2. |x-4| < 3 Answer- 1< x < 7 3. Solve for x in 3x + 4 =28 Answer-8 4. An algebraic ___________ has an equal sign. It...

Pre-Cal(Please check)

1) Find the Asymptotes: y = -2 sec 2pi x pi/2b and 3pi/2b pi/2(2pi) = pi/4 and 3pi/4 Is this correct? 2) Find the period and asymptotes: y = 1/2 sec pi x / 2 b = pi/2 I do not know how to find the period of asymptotes for this one. My original answer was 1 for the period and ...

physics

Vector V1 is 8.58 units long and points along the -x axis. Vector V2 is 4.45 units long and points at +40.0° to the +x axis. (a) What are the x and y components of each vector? V1x = Incorrect: Your answer is incorrect. V1y = Incorrect: Your answer is incorrect. V2x = ...

HISTORY

WHAT WAS THE NAME OF THE FIRST CONFEDERATE PRESIDENT? Thank you for using the Jiskha Homework Help Forum. That was Jefferson (Jeff) Davis. what is at the bottom of sparta's social group? Check this site for your answer. http://www.sfusd.k12.ca.us/schwww/sch618/...

Social Studies

1. How did mechanization change the agricultural industry? (Choose all that apply. 1. it increased production of crops 2.it caused the cotton industry to decline 3.made dairy products safer to consume 4.caused a decrease in efficiency 2.which of the following are aspects of ...

Chemistry

The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.50 g of naphthalene (C10H8) in 425 g of benzene (Kf of benzene = 4.90°C/m)? I worked this problem for someone just a couple of days ago. delta T = kf m kf = 4.90 m = molality = mols/kg. ...

Concentration increase

Question: What would happen to the Rf values of the pigments if you were to increase the relative concntration of acetone in the developing solvent? Note: The development solvent used was 70% hexane - 30% acetone. My answer: Acetone is more polar than hexane so the increase in...

English expression

Let's play the 'who is it' game, in which the appropriate person stands up. Class, first, stand up. I will ask you questions. If your answer is 'Yes, I do' or 'Yes, I am', you should remain standing. However, if your answer is 'No, I'm not' or 'No, I don't', you should be ...

calculus

a) Let f(z) = z^2 and γ(t) = 1 + it^3, t ∈ [0,1]. i) Write out the contour integral ∫γ f(z)dz as an integral with respect to t. You do not need to evaluate this integral. ii) Evaluate the integral ∫0,1+i z^2dz iii) What is the relationship between ...

Calculus

the grand canyon is 1600 meters deep at its deeoest point. a rock is dropped fromthe rim above this point. Express the height of the rock as a function T in seconds. how long will it take the rock to hit the canyon floor? H= 1600-1/2t^2 thats what i got as a function is that ...

Calculus - Damon

Find the line which passes through the point (0, 1/4) and is tangent to the curve y=x^3 at some point. So I found the derivative which is 3x^2. Let (a, a3) be the point of tangency. 3x^2 = (a3 - 1/4)/(a-0) I'm not sure how to solve for a. Yes, the point is (0,1/4) but it's not...

Fused Sentence

How do I re-write this sentence using the fused sentence format? See below The creature sat upright and tugged at the shackles binding his ankles, Frankenstein uttered a piercing scream. Check this site for ideas about how to rewrite that sentence. Then post your rewritten ...

help!

Can you please give me one of them so I cansolve for the other one?PLease! The general formula for a straight line is y = mx + b. Just plug the points into the equation to arrive at two equations. 6=2m+b 10=4m+b you have two equations and two unknowns. Solve them ...

Physics/Math

In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.6 kg book is pushed from rest through a distance of 0.90 m by the horizontal 22 N force from the broom and then has a speed of 1.60 m/s...

science

i do not understand how to answer the question if it has (N) instead if saying (kg) how would i answer, and the question is.: if the net force is 100N, and the acceleration is 5m/s squared how much mass am i moving? please answer soon!! Thank You!!

math

please answer this my topic is all about sums and differences of rational algebraic expression perform the indicated operation reduce answer to lowest term 3/5 + 4/5 another is x/3 - y/3 another is 7/a + 2/a please answer it thanks!!!!!

algebra

I need to know if I am doing this problem right when sustitution method. y+2x=3 y+2x=-4 y+2x=3 -1(y+2x=3)-y-2x=-4 now add the two equation y-2x=3 -y-2x-4 the answer would be -4y=7 then divided -4=7 answer 1.75 I no that there is more to this answer I am just stuck and not sure...

algebra

I need to know if I am doing this problem right when sustitution method. y+2x=3 y+2x=-4 y+2x=3 -1(y+2x=3)-y-2x=-4 now add the two equation y-2x=3 -y-2x-4 the answer would be -4y=7 then divided -4=7 answer 1.75 I no that there is more to this answer I am just stuck and not sure...

Math

I have the problem: A triangle has a base of 3.6 cm and an area of 22.32 cm squared. What is the height of this triangle. The teacher gave us the answer key and I know the answer is 12.4 but I don't know how they came to that answer. I can't figure out how you are supposed to ...

algebra PLEASE HELP ASAP

1. the probability of a basketball player hitting a foul shot is 1/3. how many shots would you expect her to make in 90 attempts. a. 30 b. 60 c. 3 d. 45 my answer is b? 2. simplify 8P3. a. 42 b. 336 c. 40,432 d. 56 my answer is d? 3. how many ways can 4 students be chosen from...

History

Hai! Anyone Please Check This Answer Please! Which of the following is the most likely reason why many Mexicans were opposed to American investment in their country? A. American leaders overthrew the successful government of Porfirio Díaz.* B. Many Mexicans wanted to invest ...

Grammar

Circle the nouns that can be used with the verbs on the right . Engine-consumption-dependence (reduce) Answer : consumption and dependence Solution-dependence-alternative (find) Answer:solution and dependence Resources-technology-stocks(deplete) Answer:Resources and technology...

Math

There are 20 question in a quiz. 5 marks will be given for a correct answer. 1 mark will be deducted for a blank answer and 3 marks will be deducted for a wrong answer. (a) Peter gives 2 blank answers and he gets 72 marks. Find the number of correct answers he get. (b) Is it ...

Chemistry

How many grams of dry NH4Cl need to be added to 2.10L of a 0.600M solution of ammonia,NH3 , to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8x10^-5. I just wanted to make sure I dd this write, can you please check my work? Thank you!!!! I found the pKa ...

English 10 Check

Below, you will find a list of sentences. After each sentence, select true if the topic of the statement is suitable to form the basis of a single persuasive paragraph. If the topic of the statement in your textbook is unsuitable for a single persuasive paragraph, select false...

math

A bag soccer balls contains 8 balls with black design and 7 balls with red design with no other types of soccer balls. Coach graves reaches into the bag and randomly pulls out two soccer balls. please check my answer a) explain these events are either dependent or independent...

Physics - Charges at an angle (check + help)

Three charged objects are located t the vertices of a right triangle. Charge A (5*10^-6) has Cartesian coordinates (0,4; Charge B (-5.0*10^-6) is at the origin; charge c (+4.0*10^-6) has coordinates (5,0), where the coordinates are in meters. What is the net force on each ...

Check my physics

Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic energy possessed by ...

Can u check my answer? U.S History

"I consider the foundation of the Constitution as laid on this ground: That "all powers not delegated to the United States, by the Constitution, nor prohibited by it to the States, are reserved to the States or to the people." [10th Amendment] To take a single step beyond the ...

accounting

On May 31, 2011, James Logan Company had a cash balance per books of $6,781.50. The bank statement from Farmers State Bank on that date showed a balance of $6,404.60. A comparison of the statement with the cash account revealed the following facts. The statement included a ...

business

On May 31, 2011, James Logan Company had a cash balance per books of $6,781.50. The bank statement from Farmers State Bank on that date showed a balance of $6,404.60. A comparison of the statement with the cash account revealed the following facts. The statement included a ...

math

On May 31, 2011, James Logan Company had a cash balance per books of $6,781.50. The bank statement from Farmers State Bank on that date showed a balance of $6,404.60. A comparison of the statement with the cash account revealed the following facts. The statement included a ...

math,correction

Multiply. (x+2)(x-2) my answer is: x^2-4 Factor completely. 3(x-2)^2-3(x-2)-6 MY answer: 3(x-4)(x-1) Factor 9x(x-7y)-6(x-7y) My answer is: (9x-6)(x-7y) Divide: (x^3+2x^2+x+12)/(x+3) My anwer is: x^2-x+4 Looks OK!

Chemistry

We have been getting numerous questions like this on assignments and I can't figure them out. Its like I know that there some way connected but I can't figure it out. This is for Chemistry in highschool and its likea review and so they are not going over it but I would still ...

statistics

Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...

Statistics

Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...

Calculus

I don't know limits fairly well. The problem is prove the limit using definition 6, lim x -> -3, 1 / (x+3)^4 = infinity. The books definition for definition 6 is, let f be a function defined on some open interval that contains a, except possibly at a itself, then lim x ->...

chem (Check)

The Question: Why must a calculated answear generally be rounded? My Answear: A calulated answear cannot be more precise than the least precise measurement from which it was calculated. I think your answer is ok but I think you are leaving out information that should be ...

Math

Please help me with this ASAP! I need help with this just checking my answers thanks 1. There are 14 blue marbles, 8red marbles, and 12 green marbles in a jar. What is the ratio of the total number of marbles to the number of red marbles? A. 24:8 B. 34:8 (my answer) C. 8:34 D...

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