/r/HomeworkHelp
Need help with homework? We're here for you! The purpose of this subreddit is to help you learn (not complete your last-minute homework), and our rules are designed to reinforce this.
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Welcome to /r/HomeworkHelp!
We are one of the most unique subreddits on Reddit, one of the few subreddits that continually self-improve itself to make communications between a contributor and an asker as effective as possible.
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Please google before posting your question
✅ Posts should look like this:
The title should be of the form [<Level/Syllabus><Discipline>and/or<Topic>] <Question>? For example:
- [Grade 8 Math: Quadratic Equations] How to factorise ax2 + bx + c?
- [University Chemistry: Titration] What is my qs?
- [AS Level English: Essay Writing] Should all adverts be factual?
Include instructor prompts. What does your instructor want you to accomplish?
Still acceptable…, but preferably not:
- [High School Math] <Question>?
Be specific about your grade
- [Grade 8 Math] Help me!
What is your qs?
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Copied questions without context or explanation. You must show some work or thought.
"Do this for me" posts such as posting of quizzes or lists of questions.
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/r/HomeworkHelp
602,324 Subscribers
[chemistry] It's saying I've got 2 of the boxes incorrect but I can't figure out what I'm doing wrong
06:52 UTC
[Grade 12: Physics, General]
This is a Self Directed Study assignment, I have had a very hard time coming up with a question to research it has to relate to one of the 4 areas above. If someone could give me a suggestion it would be much appreciated.
06:05 UTC
[10th grade Algebra: Remainder Theorem] How do I solve for a when they're at different degrees when substituting?
05:58 UTC
[Grade 12 Math: Trigonometry] How would I go about doing these two questions? I've tried but I just don't know where to start
05:56 UTC
[College Intro Stats] - Craft a Confidence Level for Averages?
05:49 UTC
[10th grade math] Can someone explain how to do this without solving it for me?
04:28 UTC
[grade 10 geometry] how do you do this? I know you have to multiply it with k but it's giving me a decimal answer
04:27 UTC
[Grade12:Advanced Functions] I am stuck on this question, this is proving identities
03:46 UTC
[Microeconomics-balance between supply and demand]
Please help xd
03:46 UTC
[Second Year College Microeconomics] How do I calculate this? Even a resource would be great I'm just not even sure what to look up.
Suppose you have three production facilities that are polluting a river. Each emits 10 units of pollution. Their marginal cost functions for reducing emissions are, respectively, 𝑀𝐶1 = $3, 𝑀𝐶2 = $4, and 𝑀𝐶3 = $5. (a) If the objective is to cut emissions in half (to 15) cost-effectively, how much reduction should be assigned to each firm? (b) What would be the total variable cost of controlling these emissions? (c) What would be the total variable cost that would result from forcing each facility to control one-half of its emissions? Is this different from the cost associated with the cost-effective allocation? Why or why not?
03:37 UTC
[grade 10 geometry] where did the S come from, and why is point V' (-5,7) when V is (-4,-6)
Got the answers from a friend, but I really can't figure out why the prime points have different numbers from the normal points.
03:31 UTC
[Grade 11 Microeconomics: Taxes and Income Distribution] I thought it was 7200 dollars but I got it wrong.
03:19 UTC
[linear algebra] I don't understand why she said you can choose any column in A and say it's in col A (more in comments)
03:06 UTC
[Grade12:Advanced Functions] How would you solve this equation, I spent a while on it
02:37 UTC
[Chemistry highschool] What two did I miss? And what is the right answer.
02:17 UTC
[ statistics] how do I find the median from this gamma CDF? and why does that give me so much trouble ?
02:06 UTC
[Grade12:Advanced Functions] Why am I getting positive and not negative?
01:31 UTC
[linear algebra] What is the difference between these two questions?
p(t) = some polynomial
p2(t) = some polynomial
p3(t) = some polynomial
is {p(t),p2(t),p3(t)} linearly independent?
Are these polynomials linearly independent in P^2 ?
for 1, I get that I would put the polynomials in a matrix and see if I can get to echelon form and that's that.
for 2, I think that I would do the same, but how do I check if it's linearly independent in P^2?
01:24 UTC
[8th grade algebra: complex equations, solve variable: help understanding particular step (where does the 1 come from?)]
My kid and his friend are having issues with this and it's been way too long since algebra for me Everything else is clicking except for where does that 1 come from??? (the part I'm pointing at) and why? We have the answer from using a calculator and an app, and the app explains it all pretty well but we're not understanding where the 1 is coming from and this is a 'project' where every step has to be shown not just an answer given. Can anyone help?
01:21 UTC
[College Functional Analysis] Finding Eigenvalues and Eigenfunctions of a Linear Differential Operator.
I posted this question on MSE earlier on today, but didn't receive much luck there, posting here in case any of you guys can give me some tips.
My professor doesn't have any examples like this for us to look at, and I can't find many similar problems online. Basically I've no idea if I'm right or wrong here.
01:01 UTC
[Grade 12 Applied Math: Factrols/Permutations]
In 2011, the estimated population of Canada was 34 699 000. If the government wants to use an alphabetic string using letters of the alphabet for every person in Canada. How long should the string of letters (repetition allowed) be so that every person in Canada can have a unique code?
2 marks for a correct strategy 1 mark for a correct answer
Im assuming the correct strategy would have to do with Factorials and Permutations because thats what the unit is about im just not sure where to start with this problem. Need something to get me going
00:29 UTC
[Algebra 2: Graphing polynomials] How to create a polynomial that satisfies all the steps
- there are exactly three roots
- the graph levels out at some point (does not need to be the x axis)
- f(-2)=4
- f(x) is increasing over (3,5)
- F(2) is a relative minimum
- F(4) is a relative maximum
- the degree of the function is even
00:15 UTC
(College Psych: Research) Proofread final paper?
Hi! I was wondering if anyone would be willing to go over my research paper. For some context, we have to make an "empirical journal article" and the TA advised me to make a lot of changes to my first draft on Wednesday and I have just finished up. Unfortunately, the TA did let me know they will not be available to read through and the paper is due this Saturday. Everything is made up (like the results n such) but if interested please comment or PM me! I have it on a google doc or can send a PDF, TYIA :))
00:07 UTC
[Grade 12 Chemistry: Thermochemistry] How would I find the answer to part B? All of my classmates have been perplexed by the question
I fully finished part A which I will attach here as well which yielded that the room would be 60 degrees celsius. However I am unsure of how to do part B since I tried adding the energy produced by both the original equation and the vaporization of the water produced by water and the final answer was 80 degrees (as seen in my work). I do not think this makes sense since vaporizations are endothermic and would either lower or have no effect on temperature. When you subtract the energy of the original equation and the energy produced by vaporization, the answer is about half that of the original, which I do not think makes sense either.
What can I do to get the correct answer and why would such steps yield it? My chemistry teacher gave me a very wordy answer and when I asked him for a better explanation he told me to look at our notes (which subsequently do not have any similar questions)
23:56 UTC
[10 th grade geometry] two problems
I just have no clue how to solve these, and have no idea where to start I feel like there’s not enough information
23:54 UTC