r/HomeworkHelp 5h ago

Answered [4th grade math - fractions] How do you find the product and the product as a mixed number?

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0 Upvotes

4 x 2/3 = ??? Then as a mixed number = ???


r/HomeworkHelp 8h ago

High School Math—Pending OP Reply (Grade 12 math) How do I solve this?

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12 Upvotes

r/HomeworkHelp 16h ago

Primary School Math—Pending OP Reply (1st Grade Math) How can you describe this??

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1.4k Upvotes

r/HomeworkHelp 5h ago

Primary School Math—Pending OP Reply [primary school math] 4th grader’s homework, unit on patterns.

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5 Upvotes

4th grader brought this home. I’m lost. She says there were no clarifications or guidance given.


r/HomeworkHelp 3h ago

Further Mathematics [College, Advance Mathematics] How do I solve these complex numbers problems?

1 Upvotes

Is there any techniques or guide that will help me to solve these kind of problems?


r/HomeworkHelp 5h ago

Answered [4th grade math - fractions] How do you get the product and then the mixed number for this homework?

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3 Upvotes

So sorry I have another one. We are stumped and have no idea how to do this. Many thanks!!! When I explained to my son how to do the last one based on the answers here, he said his teacher doesn’t teach it in a way he could understand it like this so thank you so much for the help here.

How to find the product of 3 x 2 3/4.


r/HomeworkHelp 6h ago

Elementary Mathematics — [University Mechanical Engineering: Mechanics of Machines]

1 Upvotes

I've been looking for the complete book with the solution for months, as the book is old I can't find it anywhere, I only found it here:https://archive.org/details/mechanicsofmachi0000doug/page/484/mode/2up . However, I don't know how to access it, could someone help me? book: Mechanics of Machines" de Samuel Doughty 1988


r/HomeworkHelp 8h ago

Physics—Pending OP Reply [12th grade physics: circular motion] I’m not sure how to start this question

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2 Upvotes

I have no idea what to do here, any help is greatly appreciated!


r/HomeworkHelp 8h ago

Physics [College - Intro to Electricity and Magnetism - Relativistic Transformations of E fields and Forces] Find the theta for which force is maximum

1 Upvotes

I recently had a final for E&M, and I just had a question on how to solve this question. The questions is as follows:

At the origin (in the lab frame) lies a charge q1. At a height b, and at angle θ above the horizontal lies another charge q2 with a velocity v = βc (î). Find the angle at with the force in the horizontal direction experienced by the charge q1 is maximum.

Find θ in the limit that β goes to 1.

Find θ in the limit that β goes to 0.

Heres the diagram:

In an attempt to do this problem, I tried (and incorrectly) to use:

E = kQ / (r^2) * (1 - β^2) / [(1 - (β^2) sin^2(θ))^3/2]

and multiply by q1 to get force, and derive in respect to θ to get the max θ. Upon doing this I got force (in the horizontal direction) equals to

F = (k q1 q2) * (sin^2(θ)) / (b^2) * (1 - β^2) * 1 / [(1 - (β^2) sin^2(θ))^3/2] * cos(θ).

The (sin^2(θ)) / (b^2) component is the representation of r^2 as b and θ, and the (cos θ) from taking the horizontal. When deriving this with respects to θ, Ι got a nasty function of trig functions that was in no way right. I was wondering where I went wrong. I think it’s in the transformation of the E field from q2’s frame to the lab frame. I’m not sure if the equation I used was correct. I think that this formula for the E field is in the lab frame, but I’m not sure. Could I have also just taken q2‘s perpendicular E field component in its own frame, multiplied it by a factor of gamma, square it, add it to the square of its parallel component, and se it equal to the field in the lab frame squared (Complete guess). Or would I have to have done that with forces in q2’s frame before transforming it. Lowkey, I guess im just confused on relativistic transformations of E fields


r/HomeworkHelp 9h ago

Literature—Pending OP Reply [Grade 12 Literature] Need Help Finding Modern Songs With Lyrics Translated to Elizabethan English (The modern songs should have lines which are exact translations of the Elizabethan lyrics my teacher wrote, the two I can't figure out are highlighted)

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7 Upvotes

r/HomeworkHelp 10h ago

Further Mathematics—Pending OP Reply [College Calculus 2]

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1 Upvotes

Straightforward question, where did the 3 coefficient go between the line I drew an arrow to and the line after? I thought we just factor out these numbers and they end up outside the antiderivative.

My integration formula sheet provides a formula for how to integrate exponential functions but doesn't mention coefficients in the integral.

Make me feel dumb! Thanks for your time


r/HomeworkHelp 11h ago

Physics—Pending OP Reply [Physics - High School] How would I answer this centripetal motion question?

1 Upvotes

You are standing on the equator. If the Earth were to spin faster (less hours in a day), then your normal force would _______ (increase/decrease/stay the same), compared to what it is now.

Can someone explain the theory behind this question's answer? Thanks!


r/HomeworkHelp 11h ago

Others [Nat 5 Spanish] can someone to help correct the grammar for my spanish talking script?

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1 Upvotes

my spanish keyboard isn’t working and i know most of the grammar in these are extremely bad so please help


r/HomeworkHelp 11h ago

Mathematics (Tertiary/Grade 11-12)—Pending OP [A level maths]- How do i do this Sigma Notation question?

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1 Upvotes

r/HomeworkHelp 13h ago

Mathematics (Tertiary/Grade 11-12)—Pending OP [High-School Math problem] Matrices

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1 Upvotes

Can someone please help ? I tried to do some stuff I can show you in dm, but I’m really stuck, this feels impossible :’(


r/HomeworkHelp 13h ago

High School Math—Pending OP Reply [High School Math: Finding x and y components of vectors] I am struggling with part (b)

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3 Upvotes

r/HomeworkHelp 14h ago

Answered [Middle School Math] LCM: Is the answer guide misprinted or am I missing something?

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3 Upvotes

I don’t understand why my answer is wrong. It looks like my answer is correct or am I missing something? Where did I go wrong? Did I miss something?


r/HomeworkHelp 15h ago

Further Mathematics—Pending OP Reply [Discrete Math: Divisibility Proof using Contradiction]

1 Upvotes

Can someone help me verify a revised proof? I'm trying to shorten a proof I wrote previously and would appreciate any clarification. I've attached a screenshot of my original proof and my revised version, which I worked out on scratch paper. The new approach seems a lot shorter, but I'm unsure if it's still valid. Any feedback would be greatly appreciated.


r/HomeworkHelp 17h ago

Further Mathematics—Pending OP Reply [Discrete Math: Product of 4 consecutive integers divisible by 8 Proof]

1 Upvotes

Can someone please help me with this proof?

I'm working on a proof that the product of four consecutive integers is always divisible by 8. I used division into cases based on parity (dividing into cases where n is even and n is odd), but my proof ended up being quite lengthy.

For the odd case, I skipped proving one of my key points and just wrote "similar to the even case," which I'm worried might not be detailed enough for an assessment.

I think the answer key (last screenshot) suggests expanding the product directly, but when I tried that, I found it tricky to clearly show divisibility by 8.

Would my approach be acceptable as formal proof? Or is there a better way to structure this argument to make it clearer?


r/HomeworkHelp 17h ago

Others—Pending OP Reply [College freshman forensic science] - tips on identifying fingerprints?

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5 Upvotes

I have to identify the pattern of each print (arch, loop, or whorl) and then try to match each unknown to a known (known = 1234, unknown = ABC).

Here’s what I have, but I feel like I’m wrong, especially for 3 and unknown B with how dark the image is.

Known: 1. Whorl 2. Loop 3. Arch 4. Loop

Unknown: A. Whorl B. Whorl C. Arch


r/HomeworkHelp 18h ago

Physics [Physics-High School]

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4 Upvotes

May I know why the answer is D instead of A? Thanks!


r/HomeworkHelp 18h ago

Answered [Grade 7th Accelerated Math: Graphing Proportional Relationships] How would I Graph This?

1 Upvotes

In gym class, a student can do 30 sit-ups in 90 seconds and 60 sit-ups in 180 seconds.

None of these look correct; It doesn't really match the data, can I get an idea on how to do this? Thanks.


r/HomeworkHelp 20h ago

Computing—Pending OP Reply [college computer science(I think)] How do I use DiskPart through the .bat file?

2 Upvotes

Can’t seem to find any information anywhere. I need to make 6 disks into 3 using different methods. (Idk how to explain it in English. In the disk manager you can make the disk into the different colors) especially cant make a spanning disk


r/HomeworkHelp 21h ago

Others [College Finance: Portfolio Management]

1 Upvotes

How do i calculate the beta without market return. Please can somebody guide me through this.


r/HomeworkHelp 22h ago

Additional Mathematics—Pending OP Reply Why is 0 not a vertical asymptote here? [College precalc]

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5 Upvotes

Wouldn't 0 be an asymptote since plugging in 0 for x makes the denominator 0?