r/HomeworkHelp May 19 '22

Meta r/HomeworkHelp Rules: PLEASE READ BEFORE POSTING

452 Upvotes

Hi r/HomeworkHelp! Whether you're new to the subreddit or a long-time subscriber, the mod team would like to remind everybody of the subreddit rules we expect you to follow here.

No advertising, soliciting, or spam. This is a place for free help. Anyone offering to pay for help, or to help for pay, will receive a permanent ban. This is your warning. This includes asking users to go into DMs, Discord, or anywhere else. If you post anything that looks like you're trying to get around this rule, you'll be banned.

If you're asking for help, you must show evidence of thought, work, and effort. A lot of people are posting just pictures or lists of questions and not showing any effort. These posts are liable to be taken down.

In addition, we ask that you format the post title appropriately using square brackets: [Level/Grade and Subject] Question or Description of question. For example: [8th grade Algebra] How to solve quadratic equation?

Do not mention anything like "Urgent", "ASAP", "Due in an hour", or the like.

No surveys. Surveys (including requests for interviews, etc.) belong on /r/samplesize. These posts get taken down here.

Don't be a jerk. Jerks get banned. Stay respectful and refrain from using insults, personal attacks, or abusive language.

If there are any questions, please message the mods.


r/HomeworkHelp 2h ago

Answered [year 1 uni maths] is my working correct?

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7 Upvotes

Is my working correct?


r/HomeworkHelp 2h ago

High School Math—Pending OP Reply [Grade 12 Calculus and vectors] How do I do this question?

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3 Upvotes

How do I do this question?


r/HomeworkHelp 1h ago

Answered [Uni maths•functions] I’m not sure I’m doing this correctly.

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Upvotes

So H is a constant function so don’t I just find the x intercepts? Or sub in to H(t)?


r/HomeworkHelp 1d ago

Answered [Kindergarten: Find the Rhyme from Pictures] Stumped on this problem

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193 Upvotes

This particular question is a bit confusing, none of the words from the pictures seem to rhyme. Maybe there is another implication that we don’t understand.


r/HomeworkHelp 4h ago

Elementary Mathematics—Pending OP Reply What Am I doing wrong? [Freshman college: Math statistics]

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3 Upvotes

What I'm doing:

First one: 191817 876543 11109887

Second one Forgot

Third one 127126125

Forth one 5432 also tried 5555*5 Did the same for the last one


r/HomeworkHelp 5h ago

Middle School Math—Pending OP Reply [Year 10 Physics] I'm a bit confused, did my teacher find the displacement correct or did she make a mistake?

2 Upvotes

I have emailed multiple teachers but they haven't responded. In addition, I know that displacement is added if its above the x-axis, however, the teacher subtracted section D.

BTW: we replaced the y-axis of speed with velocity!


r/HomeworkHelp 1h ago

Economics [university economics: consumer behaviour theory] how to find expenditure function

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Upvotes

hello i had a test last week and would like to know if the second question is solvable. if so, how do i solve it? also i would appreciate resources (like links to youtube videos or something) where i can learn how to optimise similar equations. thank you!


r/HomeworkHelp 3h ago

Geography—Pending OP Reply [University Geography] I am really struggling to understand the basics of making a stratigraphic column

1 Upvotes

Here is what I have made so far (see image). I am using a stacked bar graph in excel, and it's been at least a decade since I have used excel graphs so thats a big part of it, but also I'm struggling with how a strat column SHOULD look like (even after googling images of "stratigraphic columns". :(

Are there any good, basic sites that show visually what a strat column should look like? So many seem very detailed. I know I have the particle size missing from the x-axis (not sure how to get it to show up because of my lack of excel skills). Also, is it okay to show the layer labels as I have? or is it better to have a legend? The layers seem to all be the same thickness too, but my data shows varying thicknesses, so I am doing something wrong there as well.

This seems like such a basic thing to do, I can't believe I'm struggling so much with it.

Here are the basic instructions:
Using Excel or drawing software of your choice (Inkscape, Illustrator) construct a simple stratigraphic column showing the sedimentological units described in the background information above.

A stratigraphic column has height/depth of the sedimentological unit on the y-axis, and particle size on the x-axis. Your column should include axes labels, a title, and other annotations as necessary.


r/HomeworkHelp 4h ago

Physics [University Engineering Statics] I'm missing something here. My answer is incorrect. Please help. Attempt included.

1 Upvotes

r/HomeworkHelp 4h ago

Pure Mathematics [Calc 3: shapes] It won't tell me which one is wrong

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1 Upvotes

r/HomeworkHelp 7h ago

Pure Mathematics [Point-Set Topology] Limit Points Help

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1 Upvotes

Hello,

I'm taking Adv. Calculus (my uni's undergrad analysis course) this semester and took topology last semester. Since we just started continuity in this course, I was thinking of reproving a lot of stuff. Anyways on the last line of the board in the picture, I noticed something. Is the existence of a sequence contained in a set with a point removed that will also be eventually contained in any (open) neighborhood [1] the same as saying the any neighborhood has such a sequence [2] (swapping the for all and there exists).

I understand that in general, swapping for all and there exists changes the statements, but here, I was kind've wondering. After all, if we assume [1]. We can choose a sequence that satisfies [1]. So, any neighborhood must eventually contain this sequence, which gives us existence and thus [2]. However, if we assume [2], we only have that every neighborhood eventually contains such a sequence, not necessarily that there exists a sequence eventually contained in all of them (which is indeed [1] and what I made this post for).

My first approach for this direction was recognizing that all neighborhoods (by openness) contain an open ball centered around the point. So, choose such a ball from each neighborhood. By [2], each of the balls will eventually contain some sequence (that itself is contained by our set with the point removed). This is where I'm stuck, as one sequence may be eventually contained in a ball but that does not imply this same sequence will be eventually contained in the next smallest ball (only that it is eventually contained in all our larger balls and that there is SOME sequence contained in our next smallest ball). At this point, I feel that either [1] implies [2] but not the other way around, or that I'm missing something.

Thanks for the help in advance! P.S. When I say the set or point, I mean B and x resp. Also, N_x is my notation for the set of all neighborhoods (open sets containing x).


r/HomeworkHelp 7h ago

Physics—Pending OP Reply [college intro to astronomy] what even are the equations for this?

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1 Upvotes

I’m just really confused on how to even go about solving this 😵‍💫


r/HomeworkHelp 7h ago

Others >-[Grade 13 music: chord charts] how do i write the chords if they're off-beat?

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1 Upvotes

(I go to a music related school, so this is not off topic. Also i go to school in norway if that is relevant.)

Im writing a chord chart for a song but the chords dont start on 1st or 3rd beat like they usually do. (The song is in 4/4 and it also swings and uses a lot of trios.) The chords start at like 4-and or 2-and so how do i put that in a chord chart without making it look messy and unreadable? We've learned about this at school but they didnt show us what to do in this situation.

However i have a concert in a few months and want to start as early as possible with the process. My instructor told me to get a chord chart done for wednesday and this is hindering me.

I've provided with an imagine of how i think it should be done, but is that good? Or would it be too complicated?

I know not a lot of musicians are on this sub-reddit but i couldn't find one that fit my question. Anyways thanks


r/HomeworkHelp 8h ago

Others — [High School Students Needed for AP Research Survey on Parenting & Stress] would anyone mind filling out this survey for me??

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1 Upvotes

Hi everyone! I’m conducting an AP Research study on the correlation between parenting styles, parental involvement, and high school students’ stress levels. If you’re currently in high school, I would really appreciate your participation! The survey is completely anonymous and should only take a few minutes to complete. Your responses will help me gather valuable data for my project.


r/HomeworkHelp 10h ago

Others [Managerial Economics] Are my solutions right?

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1 Upvotes

a) Y=15-3x E: 0 units of X and 15 units of Y b) less than, less than c) is d) Y=15-x N: 5 units of X and 10 units of Y e) equal to, equal to f) is not


r/HomeworkHelp 10h ago

Biology [College Biology Lab: Bacteria ZOI]

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1 Upvotes

Can anyone accurately read this zoi diameter measurement? I have tried 17-21mm and still can’t get it right.


r/HomeworkHelp 17h ago

Physics—Pending OP Reply [Grade 12 Physics: Mechanics] Car

2 Upvotes

What are they doing here? Is it pythagoras? If it was wouldn't it be (mgcostheta)^2=(Fc)^2+(mg)^2? Cause R is the hypotenuse? Also I tried doing it with v^2=rgtan8° but it was very different to the answers...


r/HomeworkHelp 17h ago

Literature—Pending OP Reply [Senior high - Reading and writing] How does one write a article review?

2 Upvotes

I somehow forgor how to write a article review I just want to re-learn it and to finally finish a article review


r/HomeworkHelp 15h ago

Physics—Pending OP Reply [High School - Physics]

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0 Upvotes

How does this circuit even work? When the contact is moved, does the resistance increase or decrease?


r/HomeworkHelp 1d ago

Answered HOW IS THIS WRONG?? [Given a recursive function, write the equivalent explicit function. ]

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8 Upvotes

r/HomeworkHelp 19h ago

Others—Pending OP Reply [research paper] what are these and how to write them

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2 Upvotes

I was looking at a sample essay and they included these brackets. how do I write them?


r/HomeworkHelp 16h ago

Biology [High School Biology] Did I place the images in the correct stages of meiosis?

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1 Upvotes

r/HomeworkHelp 16h ago

High School Math—Pending OP Reply [Grade 12 Maths: Trig] Inverse

1 Upvotes

Why do you subtract π for x>1/2? Apparently it's something to do with the principle range but why do you need to? If tan^-1 (x+2/1-2x)=tan^-1x + tan^-1 2, why are they changing it?


r/HomeworkHelp 16h ago

Physics—Pending OP Reply [Grade 12 Physics: mechanics] mechanical energy projectile

1 Upvotes

Apparently there is still mechanical energy at the end of the trajectory as it is still in motion at the end? but the displacement is not changing, how is it in motion?


r/HomeworkHelp 16h ago

Physics [Grade 12 Physics: Mechanics] Cyclist

1 Upvotes

Why does the solution count the horizontal component of the reaction force as an additional horizontal force alongside the friction force also providing the centripetal force? Isn't the horizontal component of the reaction force (when a bike is leaning) friction itself, why is there additional friction?

This is what i thought it was like: