Can you check my work and see if I did the problem correctly? Thanks! A solid with a base formed by intersecting sine and cosine curves and built up with semicircular crosssections perpendicular to the xaxis. Find the area of
63,252 results
algebra1
the problem is 5f+7 less than or equal to 22. can anyone please work this out for me and check it for me? and what i mean by checking it is like when you get the answer you check it and make sure its write.

Ed Tech plz helppppp
What does it mean to troubleshoot your computer? identify problems with your computer and attempt to fix them*** to open your computer to see what's missing from the hard drive to switch the mouse and keyboard plugs to download and print an new computer

chem
which of the following is a chemical reaction? A) propane forms a flame and emits heat as it burns. B) Acetone feels cold as it evaporates from the skin. C) Bubbling is observed when potassium carbonate and hydrochloric acid solutions are mixed. D) Heat is

calculus
Consider the solid obtained by rotating the region bounded by the given curves about the xaxis. y = 9  9x^2 , y = 0 Find the volume V of this solid. Sketch the region, the solid, and a typical disk or washer. Any help or tips would be greatly

Chemistry
Classify each of the following by the type of solid if forms: a. LiCl b. BaCl2 c. BCl3 d. CCl4 e. NCl3 I have four different types of solids to guess from like Metallic solid, ionic solid, molecular solid, covalent network solid and i don't know which goes

Algebra
Will you please check my work? I'm supposed to "Use square roots to solve the following equations; round to the nearest hundredth, if necessary." 1. 5x^2  526 = 651 My Work: 5x^2  526 + 526 = 651 + 526 (sq root of) 5x^2 = (sq root of) 125 = 5x/5 =

calc
f(x)=8cos4x What is the derivative? Im doing online homework and i keep getting an incorrect answer. How do you work out this problem correctly? thanks

Chemistry
ok.. im confused: Ammonia and oxygen react in the equation: 4NH³+5O²> 4NO+6H²O. When 2.4 mol of NH³ are present, the reaction yields ____ mol of O². i have no clue how ot do this! Look at your problem to make sure it is posted correctly. NH3 REACTS

Algebra 1
Keesha is having trouble solving the following compound inequality. She arrived at a final answer (below), but when she checked her work, she discovered that it is incorrect! Find Keesha’s error and explain to her how to fix it and solve the problem

Chem
A solution is made by mixing 50.0 g C3H6O and 50.0 g of CH3OH. What is the vapor pressure of this solution at 25 degrees C? What is the composition of the vapor expressed as a mole fraction? Assume ideal solution and gas behavior. (At 25 degrees C the

english 2
can yall check my answers? 16. identify the sentence in which the underlined pronoun is used incorrectly a. YOU'RE never going to believe what i just heard! b. have you turned in YOU'RE english paper yet?

Geometry
Good morning. I have a Geometry math problem that I need if someone can please check on to make sure I am doing the problem correct and to please check my answer. #7 Given segment DF with D(1, 11) and F(9 , 5), if E partitions DF such that the ratio of

Math
I don't have any specific problems I need help with, but I'm a bit confused about two things: 1) Where 2^x  1 = y, is x or y the Mersenne prime? 2) I have noticed that in some cases, such as 27 * 3, I can break the problem up and arrive at the correct

Algebra 2
Find the inverse of the following function: f(x) = 3x + 12 I don't think I worked this problem off correctly...I am suppose to find the inverse of the function Is this the correct way to work this problem? y= 3x + 12 x= 3y + 12 3y = x  12 f1(x) = x 

third grade math
how do you check addition problems by adding up? Let's use this addition problem as an example. 21 35 ___ First you add 1 + 5. To check your work, add up, 5 + 1. If you have a column of numbers and you go down each column to add them together, that's

chemistry
I have to write a balanced equation for the decompostion of solid copper (ii) sulfate to form the gaseous sulfur trioxide and solid coper (ii) oxide. I would appreciate it if you could tell me if I have written it correctly. CuSO4 >>> SO3 + CuO If I did

algebra
i have two answers to this problem so am not sure which way I need to do in or should say the order i should do it. lease help??????? problem is 7x5+3x=6+x10 what is the order to work this out there is no brackets to this problem 7xx+3x=6+510

Stats: Joint Density Function
Let the joint density function of X and Ybe given by: f(x)={kxy^2 for 0

CalculusReiny
Yay! Reiny, you read the description of f(x) correctly. Recall the problem posted earlier: Let f(x)= abs of negative abs of x + pi/2 close abs and g(x)= abs of cosx. the wording might be confusing so here is another description of the equation (the

math
I was wondering if someone could double check my work on a test I'm self correcting. Here's the problem, it has to do with Cramer's Rule. 24x + 6y = 11 24x + 60y = 25 I ended up finding the base determinant (D), and then dividing Dx and Dy by D. My

Calculus
We are doing problems with the product and quotient rules, but I'm not sure if I'm doing them correctly. If someone could check my answer I would really appreciate it. The original problem was y = (2x1)^5 * (4x+1)^1 and I got the derivative to equal y' =

math
1. Is this student's work correct? ( 9 x 10^3 ) ( 5 x 10^2 ) = ( 9 x 5 ) ( 10^3 x 10^2 ) = 45 x 10^3+2 = 45 x 10^5 A. Yes. The student rewrote the problem and then multiplied correctly. *** B. No. The student should have changed the scientific notation to

Chemistry
I am not sure if I understand how to balance this correctly. I need to write a balanced equation for the decomposition of solid copper(ii) sulfate to form gaseous sulfur trioxide and solid copper (ii) oxide. 2CuSO7 = CuSO4 + SO3 + CuO

Science
Please Check my Work:pls check my work asap! 1. A ___ has a definite shape and a definite volume. (1 point) 1. solid (My Choice) 2. liquid 3. gas 4. molecule 2. Why is a gas able to flow? (1 point) 1. Its particles have melted and can move around. 2. Its

organic chem
A student's correctly calculated value for the percent recovery of the purified unknown solid in a recrystallization experiment was 102%. Assume that the student performed all steps of the procedure correctly a) comment of the validity of this result;

Math fraction equations
How would I solve this equation? d1 = 1 1 ____ ___ 4 2 (d1) divided by 4 = 1 and 1/2 Thanks, Ok, I'll set up your problem this way: (d1)/4 = 1 1/2 1 1/2 is the same as 3/2. Therefore: (d1)/4 = 3/2 Multiply each fraction by a common denominator,

Calculus
Hello, I would like to make sure the answers to these questions are correct. 1. Using the shell method, what is the volume of a solid that is generated by rotating the region by y = x^2 and x = y^2 about the x axis. My Work: r = y h = sqrt(y)  y^2 2pi

Algebra Zero Product Rule
I'm working with the zero product rule and I've somehow lost my way on a certain problem pattern. (x+8)(x3)= 30 Is the pattern and the answer in the book says 2 or 3, but when I do the problem... x²+5x24= 30 x²+5x+6= 0 (x+6)(x1) x= 6 x= 1 That is

Math
"Find the slope of the line passing through J(0,5) and K(1,2)" I did the problem but I just need someone to check if its right. my work: M= y2  y1  x2  y1 M= 2  5  1  0 M= 3  1 M= 3 Thank you.

algebra
Solve the system using elimination X+3y=5 4x+4y=4 I tried to work this problem and this is what I came up with. x+3y=5 x+4y=20 7y=15 y=7/15 and x= (5+y)/4 (5+7/15)/2 2/15 x=2/15 x=2/15, y=7/15 I would like for someone to check to see if it is correct.

5th grade math (dividing fractions)
Can you check this problem? How many twelfths are in one sixth? work: 1/6 divided by 1/12 = 1/6 * 12/1 = 2 ans= 2

Physics  pulley
A construction crew pulls up an 87.5kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. I have

Algebra
I have this math probelm z(3z)/(2z)=(6)/(z2) in my book it says to solve the equation. I have worked this problem many times and I keep comming up with different answers. When I use an online calculator to check my work it is giving me an answer of z=3

FRENCH WORK ASAP
please please someone check my work I don't understand it fully so I am asking if someone could please check my work thank you if it's too much I'm sorry. God Bless

algebra1
could you walkthrough the steps to solving this problem because I am stuck; 3x5(3x7)=2(x+9)+45 Let me know if you have a question in any step. 3x5(3x7)=2(x+9)+45 3x15x+35= 2x+18+45 12x+35 = 2x+63 35 35 12x= 2x +6335 12x= 2x +28 2x 2x 12x2x

math
Ex 2: 2x+7=22 2x+77=227 2x=15 2x/(2)=15/(2) I do not have to switch the equality sign. Even if I did it would not look any different. x=7.5 Check: 2x+7=22 2(7.5)+7=22 my solution is that x=7.5 so I will just put that in to see if it works.

history
can some one check my work? i can where is it It's the one with the one that says order the sequence. Hi! brie. My work is on the 2nd page. Count the BLACK dots next to everybody's name until you find the 35th dot. Check that work. You'll see it next to my

Calculus (area of base and volume of solid)
Can you check my work and see if I did the problem correctly? Thanks! A solid with a base formed by intersecting sine and cosine curves and built up with semicircular crosssections perpendicular to the xaxis. Find the area of the base and the volume of

Calculus
I would like to know if my answers are correct: Disclaimer: We are allowed to keep our answers in formula form 1. Use the washer method to find the volume of the solid that is generated by rotating the plane region bounded by y=x^2 and y = 2x^2 about the

MATH
in a contest, Bello. Adamu, and Lawi are asked to solve a mathematical problem. the probability that they solve the problem correctly are 1/5, 2/3, and 2/5. find the probability that:(1)None of them solve the problem correctly(2)At least one of them solve

Algebra
Will you please check my work? I'm supposed to "Use square roots to solve the following equations; round to the nearest hundredth, if necessary." 1. 5x^2  256 = 651 My Work: 5x^2  526 + 526 = 651 + 526 (sq root of) 5x^2 = (sq root of) 125 = 5x/5 =

Algebra
I am having issues with factoring. I am trying to check my work using a TI84 Plus calculator but I don't know how to plug in a problem to check its factoring. Can anyone help? for example 44y^3+55y^211xy how can I go about plugging that in to check my

Rational Inequality with Absolute Value
Here's a question I'm having trouble with: x/x+2=0 and x+2>0, x must be greater than or equal to zero. When I solved for x in this case, I got x>4. Reconciling the constraints leaves me back at x>=0. Did I do that correctly? Case 2: x is greater than

Yet another science question..
How much work is done when you push a 50kg refridgerator across the room for 3 meters? None, if you ignore friction. Work requires a force, gravity is upwards. In reality, work is done in pushing horizontally, but that is due to friction, not mentioned

math,correction
okay for the first one i/ve done it twice and both times i got 10, not 10. check your work to make sure you did it correctly. for the second one i got 24 so you are correct Directions solve for x. (x)/(x2)(x+1)/(x)=(8)/(x^22x) The answer i get is :

math
solve algebraically and check y=8x+3 y=4x21 8x+3=4x21 +4x +4x 12x+3=21 3 3 12x=24 x=2 y=8x+3 y=8(2)+3 y=16+3 y=13 (2,13) check y=8x+3 13=8(2)+3 13=16+3 13=13 y=4x21 13=4(2)21 13=821 so 13=13 these check, so did I do this

Math
Can someone check my work and see if I did this correctly? Problem: 9^(x+6)=3^x ln9^(x+6)=ln3^x (x+6)*ln(9)=x*ln(3) (x+6)/x=ln(3)/ln(9) x/x+6/x=0.49999977 1+6/x=0.49999977 6/x=0.499999771 6/x=(0.5000002) x=6/(0.5000002) x=(11.9999952) is this correct?

Algebra
I cannot seem to work this problem out correctly as all answers found do not make the equation work. 1/4  2/3y = 3/4  1/3y

INTEGRAL CALCULUS PLEASE HELP!!!
If F(x)dx=1 from 1 to 25, F(x)dx=4 from 1 to 4, and F(x)dx=9 from 17 to 25, then: 1) What does F(x)dx from 9 to 17=? 2) What does (1F(x)4)dx from 9 to 17x=? I have no idea how to do this problem and have been on it for hours! The problem is not typed

Math
I would just like someone to check my work and make sure I am doing it correctly before I continue. f(x)=x^23x+5 1. f(2) I got f(2)=7 and g(x)=5x1 1.g(3) I got g(3)=16 Thanks for any help!!

Math
Math Problem: Find the area of a circle that has a radius of 14 feet. Round your answer to the nearest hundredth. Would someone please check the way I worked this and let me know if I did it correct or not? Thank You A=3.14 (14ft)2 A=3.14 (196) A=615.44 Im

business math
I'm trying to solve this problem: What sinking fund payment would be required at the end of each threemonth period, at 8% interest compounded quarterly, in order to amount to 20,000. I just need to know how to work the problem correctly.

mat 115 week 8
Please help me with this math problem. I don't know if I am doing this correctly. 21  (9) __________ 21  (21) Am I correct in answering this problem correctly? 12 ____ = 12 0 If not can you help me with the right answer? Thanks kindly

Algebra
I also need you to check and make sure that I am using the FOIL method correctly for this problem. #82). 9ww^3 9ww^3=w*(w^29) I have to factor out the GCF, which is “w”. 9w^2=3^2w^2= (3w) (3+w) = (3w) (w+3) 3w=(w3) (3w)(W+3)=(w3) (w+3)

Calculus
Can you please check to see if these answers are correct? I have provided my work as well! That you! This is much appreciated!! 1. What is the volume of the solid that is generated by revolving the region bounded by the curves x = 3y^22 and x = y^2 and y

Chemistry
i have no idea how to set this problem up! please help! A 22.19g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 50.0 mL. The solid and

Algebra
I also need you to check and make sure that I am using the FOIL method correctly for this problem. #82). 9ww^3 9ww^3=w*(w^29) I have to factor out the GCF, which is “w”. 9w^2=3^2w^2= (3w) (3+w) = (3w) (w+3) 3w=(w3) (3w)(W+3)=(w3) (w+3)

Science 8R  Volume Lab
I doing this lab for my science class about volume. In class today I collected my data. I measure the regular solid (LxWxH) and as for the irregular solid I use water displacement by putting the irregular solid (that is small) in the graduated cylinder

chemistry
AgCl Ag^+ + Cl^ NaCl ==> Na^+ + Cl^ Ksp = (Ag^+)(Cl^) = 1.8 x 10^10 Let S = solubility of AgCl, then (Ag^+) = S (Cl^) = S+0.01 Solve for S. Note: A similar problem to this post (0.1 M NaCl instead of 0.01 M NaCl) was on a couple of days ago; the one

Math 116 algebra please check
Solve 0.3x + 8 < 1.1x9 The solution is x > 85/7 The problem with the greater than sign has a line under it but I can get it to work correctly from my word document

Calculus AP  Volume of Revolution
Hi. I have a few calculus problems that I have to do using the washers and shell method to find out what the volume of the graph rotated is. I'll post one question at a time with my work. The problem is, I should be getting the same answer for the problem

Geometry
I worked this problem, but I just want to check and make sure I did it correctly. Given U = {15,16,17,18,19,20,21,22,23,24,25} A = {16,18,20,22} B = {17,19,20,23,24} Find A'¿B'. Finding A', then B' then find their intersection.

ap chem
could you please check my work? what is the volume of one mole of solid iron at 25 degrees c? 1 mol Fe/.141 mol/cm^3 = 7.10 cm^3 (the .141 came from converting the density in to moles) is that correct? then the next step in the problem is to find the

Calculus
Can you check if I set up the integral correctly? Thanks! He carved a parabola out of the cover of his teacher’s edition. It spins around the antenna in the wind. Find the volume of this solid of revolution if the equation of the parabola is x=1y^2 and

Calculus
Greetings, So I've been working on this problem: H(x) = (x^4  2x +7)(x^3 + 2x^4) H'(x)= Kept on getting it wrong and I assumed it was an algebra mistake. After multiple tries I went to a few derivative calculators to check my work... What I saw was the

math
Please check this problem to see if I answer correctly x  3 > 8 Answer x > 11

CHEMISTRY
How many grams of sulphuric acid (H2SO4) are needed to make 1.5L of a 1.5 molar solution? ~~~~~~~~ Here's my work so far: 1.5L x 1.5mol/L = 2.25molH2SO4 2.25mol H2SO4 x 98.09g H2SO4 / 1mol H2SO4 = 220.7025g H2SO4 I wanted to ask if my work is correct,

Chemistry
which method increase the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding has to the solid C)heading the solid D)reducing the size of the solid

calculus
I've tried this problem about 20 times and a bunch of different ways and I can't seem to get it right. The problem is: Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. Where y=1/(x^3), y=0,

Calculus
I've been working on this problem for while, and I keep getting the answer wrong every time I do it. The volume of the solid obtained by rotating the region enclosed by y=e^(5x+1) y=0 x=0 x=0.8 about the xaxis can be computed using the method of disks or

organic chemistry
recrystallization question: a student's correctly calculated value for the % recovery of purified unknown solid was 102%. assume that the student performed all steps of procedure correctly. a) comment on the validity of the result (include reasons). b)

Math Help
Directions are that i have to solve the equation and graph it using words.I have to include whether itis a solid or dotted line and which way the shading is. Problem: 2x+3y

Math
Please help me with this step by step show your work problem. 4b8+1b^2+2b^3 (b= 2) My work 4b8+1b^2+2b^3 4(2)8+1(2^2)+2(2^3) 88+1416 8+8+516 16+516 5 Could you check my work? If it is incorrect, could you show me the

Precalculus
So for our review, our teacher posted the answers to the review online. I do the problem and check my work with the review, but I am questioning number 8. Here is the problem with the answer: prntscr.c0m/4rnpcn How does it equal 16? I am so clueless! G * F

Algebra
I need help trying to put the correct vocabulary words when solving this problem such as grouping, factor, prime factor, GCF, and perfect square, and please check and see if I am doing this correctly. 15x^2+31x+2 In my last problem I will be using the

Math
Could you help me with this problem? 2 5 Sorry couldn't type the problem correctly. The problem is 5 to the negative 2. I got 0.04 is the answer. Is this correct. Thank you.

Science
Work or no work? Work=ForcexDistance 1. A person holding a box of potatoes. No work 2. A batter holds his bat at his side while waiting for his turn to play. No work 3. Your sister carries home her books from school. No work 4. You push a box from point A

Management Accounting
well i try to solve this problem but it look so complicated I need to cash buget what's the problem? check the problem i don't get it check the problem i don't get it

Basic Algebra
I have to solve the following equation and check my work. Not sure how to do this if someone oculd help me out. The problem is (17b5)8(2b+4)=6

math
what is the square root of 5z2, then it says plus 7=10 First, subtract 7 from each side so you now have: sqrt(5z2)=3. Then square each side, so you now have: 5z2=9. Then add 2 to each side so you have 5z=11. Then divide each side by 5 and the answer is

Math
^=exponents /= divide So I am not sure how to do this. It is an example in my book but I still don't get it. Can you work through ti so I can do my real work. (1^2+1^2)^1 (1^2+1^2)^1 = First, do work within the parentheses. 1*1 = 1 and 12 =

language art CHECK
Will somebody please check this for me and see if i used the words correctly please? Having spent many years as political opponents, the two senators have developed a(n)MUTUAL respect for each other. Please check if it is correct. thank you

Math[PLease Check]
Problem: 25x^2 6  *  12 5x What I got: 5x  2 *PLease Check My Work. No. Factor the 25x^2 into two factors. Then the 5x in the denominator divides out. So then is it: 5+x  2 yes. 12x12

Algebra
I can't figure out this problem... 2x2(x1) = 41+x(3x) solve for x Will you also show your work and check step Thanks, :)Juliet

Calculus
I don't understand how to answer this problem: The base of a solid is bounded by y=x+1 and y= x^21. Find the volume of the solid if the cross section is perpendicular to the x axis are equilateral triangles.

math
the limit of cuberoot((3x^3+5x+2)/(x^21)) as x approaches 3 is the problem. how could (3x^3+5x+2) so it would be factored out with denominator? thanks! If you read the answer I gave for the previous question, then you can take the limit inside to get

Algebra
I need help trying to put the correct vocabulary words when solving this problem such as grouping, factor, prime factor, GCF, and perfect square, and please check and see if I am doing this correctly. 15x^2+31x+2 In my last problem I will be using the

Algebra 1
Jenny simplified the expression 7x + 5y + 4(x – y) – 6 and listed the Number Properties used: c) Redo the problem correctly. Justify each step using the correct Number Property. (2 points) Jenny’s Work Number Property Used 7x + 5y + 4(x – y) – 6

chemistry
What is the balanced net ionic equation for the reaction of dilute nitric acid with solid aluminum oxide? Frankly, I thought aluminum oxide was insoluble in almost anything except alkali. My CRC Handbook lists it soluble in alkali and organic solvents. The

Chemistry
On strong heating, 12g of NaHSO4 release 0.9g of water vapour and a white solid is left. Deduce a chemical formula for the solid. How can I work this out? Thanks :)

Math [Calculus]
I'm asked to find the volume of the solid bounded by the curves x=1+y^2 and y=x3, rotated about the yaxis. I have a general idea of how to start the problem off, but I'm not sure how to find the interval that I need to work with...

Psychology
Individuals who use problemfocused coping will deal with a problem or stressor by: A. making changes in their behavior. B. accepting support through sympathy. C. changing their point of view concerning the stressor. D. attempting to manage their emotions.

Chemistry
Which method increases the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding gas to the solid C)heating the solid D)reducing the size of the solid ****Please help!!!!******* I think the answer is C but i am not

Geometry
Hello thanks again. I gotten your advice previously and wanted to check to see if I did this problem correctly. Is this answer 1458 ft or the reverse of 189 ft? _________________ If the measures of two corresponding sides of two similiar solids are 3

Math
Simplifying Radicals: 2ã108  ã180y The check mark represents the radicand. How do I work this problem?

algebradistributive
how would you do this prob. negative4(5y+6) = negative 7y+3 thanks. happy halloween I'm going to assume your problem is this: 4  (5y + 6) = 7y + 3 If that's the case, distribute the negative over the terms in the parentheses first: 4  5y  6 = 7y +

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

Math
I haven't done factoring in ages I'm trying to factor this X^2  2X + 8 If i remeber correctly sense the leading coefficent is 1 the factored form is in this format (XA)(XB) which would give you X^2 AX  Bx + AB or simply X^2 (A+B)X +AB so then in my

Gen Chem
Which of the following conditions MUST be true for the entropy of a pure solid to be zero? a) T must be 0 K b) The solid must be crystalline and not amorphous c)the solid must be perfectly ordered d) the solid form must be an element

math
I'm trying to factor a problem and cannot seem to get it to work out  12a^3 + 10a^2  8a I first factored out the gcf of 2 to get 2a(6a^2 + 5a  4) From there I keep coming up with answers that are incorrect when I check them  any suggestions please?