# Calculus (Answer Check)

85,687 results, page 12

### Chenistry check

Can someone check my answer? The question is: In order for the reaction 2Al(s) + 6HCl(aq)-> 2AlCl3(aq) + 3H2(g) to occur, which of the following must be true? a. Al must be above Cl on the activity series. b. Al must be above H on the activity series. c. Heat must be ...

### Calculus Answer Check

Rocket A has a positive velocity v(t) after being launched upward from an initial height of 0 feet at t=0 seconds. The velocity of the rocket is recorded for certain values of t over the interval 0 <= t <= 80 seconds, as shown below. t(seconds),v(t)(ft/sec) = (0,5),(10,...

### Calculus - Limits

lim x--> 3 (3 - x)/ (x^2 - 9) I know the answer is -1/6, but I can't figure out how to get there.

### Pre-Calculus

tan^2x-sec^2x=? Can you show me how to answer this?

### Calculus

Find a formula for the derivatives of the function m(x)=1/(x+1) IS the answer -1/(x+h)(x+h+1)

### Calculus

Find the derivative. g(x)=cos(x^6) Isn't the answer -6xsin(x^6)

### Calculus

limit of (10^n)/(n!) as n->infinity The answer is zero. Can you prove it?

### calculus

d/dx of ln(t)/t i believe the answer is 1-ln(t)/(t)^2 but i just want to make sure.

### calculus

Question: what is the derivative of f(x)=x^2*e^x Would the answer simply be 2x+e^x?

### calculus

Use the demoivre's theorem to find the answer? (1+i)^8

### Calculus

Simplify difference quotients. 1/(1+h)-1/h I got 1-1-h/h but the answer is -1/(1+h)

### Calculus

For which point(s) on the graph of f(x)=5x/(x+2) is the slope of the tangent 2/5? a) (-3,15) b) (7, 35/9) c) (3,3) and (-7,7) d) (24, 60/13) Answer is C?

### college Calculus Help!

If f(x)= ∫(21,x) t^5 dt then f'(x). my answer was 1/6 (21^6-x^6) it said it's wrong.

### Calculus

Find the dot product of (u+v)*w u=-1,3 v=2,4 w=2,-5 Answer choices: A:37 B:-37 C:-29 D:-33 E:29 F:9

### Calculus

Find the critical numbers of y=x(4-x)^1/2. The answer is x=8/3 but I got x=7/2.

### brief calculus

x/(x − 6)^2 I get ln(x-6)- 6/(x-6)+ C but it isn't correct, what should the answer be?

### Calculus

Differentiate. cos^3x My answer: -3cos^2x sin^2x

### college pre-calculus

simplify: (y+1)(y/1-y^2) which answer: A. Y/y-1 B. y/1-y C. y+1/y-1 D. -1 this is what i got y+1/1* Y/1-y^2=-1

### Calculus Help

Evaluate lim x-->25 5 - square root x / x - 25 I don't get how the answer is -1/10

### Algebra

How do I solve this? The perimeter of a rectangular writing pad is 28 inches. The length is 1 inch less than twice the width. Find the width. Show all work! Translate your English into Math <The length is 1 inch less than twice the width> or L = 2W - 1 <Perimeter is ...

### college algebra

can someone check my answer for me please! 5x+6y=18 solve for y 6y=18-5 y=3-5/6x

### math

can someone check my answer Graph by first solving for y. x + 2y = 8 x-x+2y=8-x 2y=8-x 2y/2=8/2-x y=4-x y=4-x/2 y=4-1/2x

### math

can someone check my work? divid t^11/ t^3 is the answer t^3r2

### Algebra II (check)

Assume that no denominator equals 0. 5x^3(7x)^2 = 5*7*7+x^3+x^2 = 245x^5(answer)

### Algebra 1

Please help me check my answer. Solve by completing the square. x^2-4x=10

### Math 116 algebra please check

Evaluate x+y/6 for x =57 and y=3 the answer is x+y/6=10

### Math problem check

Simplify: (2/a + 6/b) / (8/ab + 4/a^2) I have the answer as a(3a+b)/(4a+2b) Is that correct?

### Math Check

Solve: x^-2 - x^-1= 5/4 I have the answer as (5+/- sqrt29)/2 Is this right?

### check my answers pplz

1. simplify 6(a+3b)-4(2b-5a) is the answer 26a+10b

### DrBob22

Can you check my answer in the last boiling point topic I posted? Thanks.

### TO: Mrs Sue...is my answer below right?

can u check it plz

### intermediate algebra-can somebody check my answer

Evaluate the expression m^2+93+7 when m=-4 -4^2+9*(-4)+7 does it = -13

### Geography check

Where is Emi Koussi located? The answer is Chad?

### Math Can anyone check my answer please

4z-24/6-z=-z,-4 <<<this is in simplifield form am I right???

### Math Can anyone check my answer please

4z-24/6-z=-z,-4 <<<this is in simplifield form am I right???

### to ms.sue

now i get it .later ill post you back to check the answer,okay?

### Algebra 1B--check

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

### Math help

Solve this equation and check answer Fraction→n/56=8

### Math help

Solve this equation and check answer Fraction→n/56=8

### Algebra 1 (Reiny)

Factor each polynomial by grouping. Check your answer. 1. 2r^2 - 6r + 12 - 4r

### Algebra 1 Answer Check

Factor this trinomial. -16x + 20x + 6 A: -2(4x + 1)(2x - 3)

### Algebra

Explain how you could check the answer to a division question in which there is a remainder

### Algebra 2 Answer Check (Reiny)

Compress f(x) = |2x| - 3 vertically by a factor of 1/4. A: g(x) = |8x| - 3

### algebra (check work)

evaluate the expression when a = , b = -3, c = -12 |a + b + c| = 22 is 22 the correct answer?

### U.S. History (Answer Check)

What act triggered violence in Kansas?

### Mathematics

what is the slope of the line that goes through (6 ,5) and (3 ,1)? 3/4 -3/4•• 4/3 -4/3 Check my answer

### Math help ;-;

Solve the equation. Check your answer. 5x-4(x+9)=2x-3 can anyone help me how to do this plz ;-; sorry

### MATH

solving rational equations solve check your answer 5/3x+1=2

### Algebra (Answer Check)

Did I do this right? Solve the following inequality. -5 > -5 - 3w (-5 + 5) > (-5 + 5) - 3w 0 > 0 - 3w (0 / 3w) > 0 (-3w / -3) 0 < w w > 0

### Algebra (Answer Check)

Am I correct? Solve the following inequality. f + 2 1/2 < -2 f (2 1/2 - 2 1/2) < (-2 - 2 1/2) f < -4 1/2

### math

Ex 3: 4x-7<2x+5 4x-7-2x<2x-2x+5 2x-7<5 2x-7+7<5+7 2x<12 2x/2<12/2 x< 6 Note I did not switch the order of the inequality here since I divided by a positive number. Multiplying or dividing by a positive number does not change the order of the inequality. So...

### calculus

Write the equation of the tangent line to the curve at the indicated point. As a check, graph both the function and the tangent line. f(x) = x7 − 7 at x = −1 7 x7

### Calculus

Let f(x)=αx^2+βx+γ be a quadratic function, so α≠0, and let I=[a,b]. a) Check f satisfies the hypothesis of the Mean Value Theorem. b)Show that the number c ∈ (a,b) in the Mean Value Theorem is the midpoint of the interval I.

### math/algebra

can someone check my answer: 3ã486 my answer is 27ã6 if not show me where I went wrong please you are right. (did you see my post to you earlier on how to create square root sign? Does it not work for you?) 3√486 = 3√81*√6 =27√6

### Trig--check answer

Solve the equation of the interval (0, 2pi) cosx=sinx I squared both sides to get :cos²x=sin²x Then using tri indentites I came up with cos²x=1-cos²x Ended up with 2cos²x=1 Would the answer be cos²x=1/2???

### geography

Can you check these for me? 1. What is the name of the country completely surrounded by South Africa? My answer is Lesotho. 2. Which state capital is farther north, Utah's or Illinois? How do you know? My answer is Illinois's, because it is above the 40 degree N line and Utah'...

### math (check answer plz)

The probability of a certain hockey player making a goal after hitting a slap shot is 1/5 how many successful slap shots would you expect her to make after 120 attempts? . . . . . . . . . . . . . My answer: 24

### Pre-Calculus

Solve. Express your answer as exact roots. (s+6)^2 = 3/4 Sq root (s+6)^2 = +-sq root 3/4 (s+6) = sq root 3/ 2 s = -6 +- sq root 3 ----------------- 2 (The answer according to the textbook is (-12 +- sq root 3)/2. What error have I made?) Thank you

### Calculus 2 correction

I just wanted to see if my answer if correct the integral is: ∫(7x^3 + 2x - 3) / (x^2 + 2) when I do a polynomial division I get: ∫ 7x ((-12x - 3)/(x^2 + 2)) dx so then I use u = x^2 + 2 du = 2x dx 1/2 du = x dx = ∫7x - 12/2∫du/u - 3/1∫1/u = (7x^2...

### English

Which of the following is a good rule to follow when proofreading an essay? A. Scan the essay twice, once for organization and once for surface errors. B. Ask your best friend to critique your essay. C. Use the computer's spell-check and grammar-check functions to be sure you ...

### education

Children will generally select equipment based on: a.their prior success with the equipment. B.the size of the equipment c.the brightness and boldness of the equipment's colors d. The opportunity for challenge presented by the equipment. My answer is D. Could someone please ...

### biology /check please

1-What phase are daughter cells in as a result of mitosis? -Anaphase 2- During what phase of mitosis do centromeres divide and the chromosone-mes move toward their respective poles? -prophase 3- Wchich phase of mitosis is the last phase that chromatids are together? -anaphase ...

### spanish/check please

1-Yo tengo (tantas/ tantos) praticas como mi hermano answer: tantos 2- Juan toma ( tantas/ tantos) lecciones de artes marciales como Carlos. answer:tantos 3- Elena tiene( tantas/ tantos) pasatiemptos como Angelica. answer:tantas 4_ Camilo tiene(tanto/tanta) interes en el ...

### Precalculus

Help with these questions help with these questions~ Thank you 1. Determine the interval(s) on which x^2 + 2x -3>0 a)x<-3, x>1 b)-3<x<1 c)x<-3, -3<x<1, x>1 d) x>1 Answer is D, x>1 --------------------------------------- 2. Determine when the ...

### Math - check answer

Given s = 10 - 10t2 + 45t3, determine the velocity when t = 1 s. velocity in m/s = My Answer S'= 0-20t + 135t^2 S'(1) = -20+135 = 115 velocity in m/s = 115 Can you please confirm this is correct. Thanks!

### science- cell structure

An inner and an outer membrane are characteristic of which organelle? my answer: Mitochondria and chloroplasts What is the nucleus? my answer- nucleus is a cell structure that contains hereditary information What is the nucleiod? my answer: the nucleiod is like the nucleus. ...

### Where are you Jasmine20, I answered your Homework

Please check your homework answer At: Name:Tanisha Subject: To:Jasmine20 I posted the answer for GURU DEFINITION. HOPE IT HELPS!!! I think jasmine20 is not on jiskha.

### CAlculus

The graph of the derivative, f '(x), is given. Determine the x-coordinates of all points of inflection of f(x), if any. (Assume that f(x) is defined and continuous everywhere in [-3, 3]. If there are more answer blanks than inflection points, enter NONE in any remaining spaces...

### mixed #'s

Find n. n+n=8 1/2 what does n =??? n+n = 2n <~~right? Therefore, you should be able to rephrase it this way: 2n = 8 1/2 Now divide each side by 2, and you'll have your answer. Yes?? I'll ask a math teacher to double-check my thoughts. =) 2 n = 8 1/2 n = 8 1/2 divided by 2 ...

### math (check my answer?)

Find the equation of a sine function that has a vertical displacement 2 units down, a horizontal phase shift 60 degrees to the right, a period of 30 degrees, a reflection in the y-axis and an amplitude of 3. My attempt at an answer: Y = 3 sin (30x- 60) -2 Can someone tell me ...

### Science

2. Perform this operation and report the answer to the correct number of significant figures: What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3. Show all calculations leading to an answer. (I think I solved this correctly ...

### French

Can you please check these thanks. Directions: Identify each person described below (we are in the sports chapter by the way) Part 1 1. Un garçon ou une fille qui joue -------------. Answer: un joueur ou une joueuse 2. Un joueur qui garde le but --------------. Answer: le ...

### Spanish;CHECK?

State whether the command is formal ("Ud.") or informal ("tú"). Come la sopa. Anwser: Formal Hable más despacio. Anwser: Formal No compres más ropa. Answer: Formal Beba m�s agua. Answer: Informal No vengas tarde. Answer: Informal

### Chemistry

please check my answers for the following questions. 1) when a measurement that has six significant digits is divided by a measurement that has three significant digits, how many significant digits should the answer have? ANSWER: 2 2) How many hydrogen atoms are in 5 molecules...

### calculus

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answer to two decimal places.) tan x ≈ x

### Fitness (Check answers)

1) Sitting in class wearing ear buds during a lecture is effective listening. TRUE OR FALSE ~ (my answer is FALSE) 2) Defense mechanisms should be used as often as possible to deal with uncomfortable emotions. TRUE OR FALSE ~ (my answer is FALSE) 3) Daily decision are often ...

### calculus

At the indicated point for the function, find the following. A graphing utility's numerical derivative feature can be used to check your work. y = (x3 + 2x)3 at x = 3 (a) Find the slope of the tangent line. (b) Find the instantaneous rate of change of the function.

### Biology

Please check my answer: Which of the following statement is not true? 1). Mitosis produces new nuclei with exactly the same chromosomal endowment as the parent nucleus. 2). Mitosis may occur without cytokinesis 3). Mitosis and cytokinesis are required for asexual reproduction ...

### Math

If possible, could a math tutor check the math post question that "daylo3" asked at 6:42 pm today, that I answered? I don't usually answer posts that I am not 100% sure of the answer. I would like to know if the way I approached this problem is correct? Thanks in advance for ...

### math

Labor rate = $12 per hour Hours worked = 36 Overhead rate = 125% Retail price of good furnished = $185 Sales tax rate = 7% Total bill for services and parts = $ The answer that I got was 762.80. Can you check my answer.

### science

So the question is write down three examples of science in your everyday life. This was my answer: sound- compression wave, Baked goods- chemical reaction, Looking at mountains or ocean- earth science Please check my answer and see if this is good thank you

### Physical Science

Hello! Thanks for checking my question out! ____ 2. Which of the following is NOT a clue that a chemical change has occurred? (1 point) a) change in color b) production of a gas c) formation of a precipitate d) change in shape My Answer: D Could someone please check my answer...

### Inequality quiz help CHECK ANSWERS

1. Gavin needs to read at least 150 pages of his book this week. He has already read 82 pages. How many more pages A. 82 + p >= 150; p >= 68 B. p + 82 <= 150; p <= 68****MY ANSWER C. p - 72 >= 150; p >= 222 D. p - 82 <= 150; p <= 222 2. Solve the ...

### chemistry

the Ksp of Bi2s3 at room temmperature is 1.60x10-72, what is its solubility in g/100 ml? Please help me with the solution. Our teacher haven't discussed this yet so I have no idea how to solve this.. and if i ever got the answer with your solution. could you please check my ...

### French

Could you please check these thanks. Directions complete each sentence with the form à (such as au, aux ect.) or de. 1. En Franch, un garçon, de treize ans va --------- collège. Answer: au 2. Et une fille qui a seize ans va ---------- lycée. Answer: au 3. Aux Etats- Unis, ...

### Algebra 1

Hello, can someone check my answer the the question below? When the digits of a two-digit number are reversed, the new number is 9 more than the original number, and the sum of the digits of the original number is 11. WHat is the original number? My answer Let t = the tens ...

### sixth grade math

Find the percent of each number. 1. 5% of 220 files Answer is 110 2. 360 kilometers is 24% of ___ kilometers. Answer is 864. 3. At a shelter, 15% of the dogs are puppies. There are 60 dogs at the shelter. How many are puppies? Answer is 25 puppies Can someone check my answers...

### precalculus (check answer)

given that x is in quadrant 1 and that sin x = 2/3, find exact the value for: sin (3pi/8) = - √(1-√2) / (2√2) is my answer correct?

### Physics- check answer please

1. A 15 kg boy falls out of his bed at a height of 0.50 m. What is the amount of gravitational potential energy lost by the boy? my answer: 74 J 2. What is the speed of a 0.25 kg ball if its kinetic energy is 15 J? my answer: 11 m/s 3. if the speed of an object is tripled and ...

### Math

I wanted to double check that I am correct on the work area and answers please. 1.Given f(x)=x+2 and g(x)= 3x-4. Find (f+g). Work: (x+2) + (3x-4) Answer: 4x-2 2.Given f(x)=x+2 and g(x)=3x-4. Find (f*g). Work: (x+2)(3x-4) Answer: 3x² +2x-8 3.Given f(x)=x+2 and g(x)=3x-4. Find...

### calculus

find the volume of the solid formed by revolving the region bounded by the graphs of y=x^3,y=1, and x=2 about the x-axis using the disk method. 9 express the answer in terms of pie) i got the answer to be 3/5 pie but im not sure if is right. i used the formula V=(pie)(r)^2W

### Check my answer plz!!

which shows 3x+6y=-12 in slope-intercept form? option a: y=-1/2x-2 option b: y=-2x-12 option c: y=1/2x-12 option d: y=2x-2 my answer is; a

### Algebra

1. Solve the equation -5y-9=(y-1) A. -1/2 <-----My answer B. -2 1/2 C. -2 D. -2/5 2. Solve the equation 3y+20=3+2y A. -1/17 B. 7 2/3 C. 23 D. -17 <----My answer Can someone please check my work.

### calculus

for the point with cartesioan coordiantes (5,-2) find polar coordinated such that r>0. express it in radians. so far i got the answer to be -.38805...is dat the answer or should i add 2pie or 360 to get r>0? Add 2PI but it says to radians?

### Calculus - series

I'm getting this answer wrong, can someone please help show me what i'm missing?? thank you :) Infinity of the summation n=0: [(-1)^n pi^(2n)] / [6^(2n) (2n)!] this is my work: [(-1^0) pi^(2*0)] / [6^(2*0) (2*0)!] + [(-1^1) pi^(2*1)] / [6^(2*1) (2*1)!] + [(-1^2) pi^(2*2)] / [6...

### pre-calculus

A sphere is contained inside of a cube, tangent to all six faces. Find the surface area of the cube as a function of the radius of the sphere. The answer in the back of the book read:A=24r^2...How did they get this answer? Thanks for helping!

### integral Calculus

ʃ (4sin²x cos²×/sin2x cos2x)dx i've got it from the book and it has an answer from the back page of the book but i want to know how to solve it..i really need it for practicing this subject...please please help..Thanks a lot.. the answer is: -1/2 ln|secx + tanx| + c

### Physics waves- check answers please

1. A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration? my answer: I got 10 mm but I'm not sure if it is the correct answer. 2. For two connect pendulums to resonate, they must have the same: a) mass b) amplitude c) density d...

### Physics waves- check answers please

1. A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration? my answer: I got 10 mm but I'm not sure if it is the correct answer. 2. For two connect pendulums to resonate, they must have the same: a) mass b) amplitude c) density d...