Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
lee mas ..

Melody 2 abr 2022

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Reporting problems.

There are a number of people having problems at the moment.
If you lodge an error can you please give all relevant information that you can think of.
Where you are in the world - the city or the country - is often very important information. lee mas ..

Melody 16 mar 2022

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How to make an empty rectangle in Latex

I just worked out how to make an empty box of various horizonal size easily in LaTex.
This is not a recommended method, but other methods that I have tried here have not worked.
This coding is really simple. Just put letters inside lee mas ..

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Melody 15 mar 2022

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HAPPY ANNIVERSARY CHRIS! (CPhill)

I just realized that you became a member here exactly 8 years ago today!

It has been great to have you here all that time

Fuera tema

Melody 13 mar 2022

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WELCOME BACK CPHILL !

Melody 11 feb 2022

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Very interesting question. No high level maths required.

This question was posted a couple of days ago.
https://web2.0calc.com/questions/geometry_73561

I think it is really interesting. It looks much more difficult than it really needs to be. lee mas ..

Melody 1 feb 2022

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Members have a better experience. Their questions get more attention.

Almost everyone is posting as a guest.
If you post as a member your questions will have a far greater chance of a timely and helpful response.
If you are a genuine learner and interact with us, you will become known and answerers will do lee mas ..

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Melody 9 ene 2022

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HAPPY BIRTHDAY CHRIS!

Melody 20 dic 2021

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Some guidelines for question askers.

Please note:
1) Ask only one question per post.
2) When asking a question talk about what you have tried for yourself. Then people will take you more seriously and will be more able and willing to help.
3) If you get an answer lee mas ..

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Melody 4 nov 2021

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Remeniscing - a little historical humour.

I just found this old post that some of you, who have been around for a while, might find amusing.

https://web2.0calc.com/questions/look-at-the-new-leader-board

Fuera tema

Melody 29 oct 2021

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0

AK47:
:oops: whats 1/4 multiplyied by 1 and then adding 3

I am going to answer with a question.
What do you get when you multiply anything by 1?
eg
6*1=
a*1=
(3bc+4)*1=
(1/2)*1=

Melody17 dic 2013

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0

DGenovese:
What would be the angles of a triangle, that has the sides of a=22.4, b=15.8, c=8.6 Using sine and cosine law

You will need to use the cosine rule to find the first angle because you need an angle before you can use sine rule.
for the second angle you can use sine or cosine rule. It doesn't matter which one although sine rule is easier to work with.
The third angle is super easy to find.

Now, do you know what the cosine rule is?
It will be easiest if you start it in the form CosA=...

Now it is your turn to show me what you can do.

Melody17 dic 2013

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Hi Chickoritalove,
I am glad that you tried to answer this question so fully.

You started out good but then you got lost.
There is no multiply by 4 here! (the 4 is added, there is an invisable + in front of it.)
I'll show you what you were trying to do

4-(3x+2)
= +4+ -1(3x+2)
=4+ -3x-2 (You did change the signs properly)
=4-2-3x
=2-3x

The other side has a similar mistake.

Melody17 dic 2013

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Since you just posted this I will assume that you are not too far away
please answer these for me, I want to know what you can do.

1) 4(3x-6)
2) -2(x-5)
and
3) 5-3(2x-4)
4) -(x+6)

Melody17 dic 2013

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Ariel:
Ok so i forget how to do these problems,so can you show me by just doing this 1 problem plz! My science exam is tomorrow and im scared that im going to fail,plus on top of that i have a social studies exam on Wednesday:
[size=150]Lactose is a sugar that is found in milk. What is the percent by mass of a solution made by dissolving 71g of lactose in 729g of water? [/size]

Okay Ariel,
The fraction of lactose will be weight of lactose divided by the Total weight of the solution
If you want to change that fraction to a percentage you multiply by 100 and put a percent sign.

Now I am going to really annoy you by asking,
What is the answer?

Melody17 dic 2013

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Hey Greasy,
Surely this one deserves some feedback. I was really proud of myself finding this for you!

Melody17 dic 2013

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Thanks special,
They are cool (and beautiful) pictures, I didn't know that snow crystals were so varied. (although those ones all seem to be more or less hexagonal - is that always the case?)
I suppose I should have known. I seem to recall hearing that no 2 snow flakes are the same, they are as unique as finger prints. Does that sound right to you?

It is sunny here. We haven't had a lot of rain for quite a while. We did have a hail storm a few weeks back. The stones were quite big. Some were about the size of golf b***s and quite jagged. Any car outside was damaged and our plants got lots of holes in their leaves.
When i was a little girl, a very long time ago, we had hail as big as tennis b***s. They really did a lot of damage, they broke lots of windows and even broke people's bones. I still remember.

Melody17 dic 2013

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Now, don't be like that Utterly,

Besides, you know it's not true.
Lots of people really enjoy maths.
I love it and I could be wrong but I think Special does to.
There are a lot of regulars on this site that really enjoy maths.

Did you notice, I am australian and we don't call it math we call it maths.

Melody17 dic 2013

+118690

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(I'm still not 100% on #3, but I think it's because if you solve the problem in a different order, like order of operations.)

I don't think that is what your teacher means, I really don't know what the question means, it doesn't make sense.

Melody17 dic 2013

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Firstly, you don't need to appologise for your answer.
secondly I am not sure what you mean but I will try to explain what I mean.
---------------------------------------------------
Q1) what is the sqrt(49)
Well the answer is +7 because the sqrt is a part of the question so only the positive answer counts.
---------------------------------------------------
whereas if the question is
Q2) y^2 = 49 find y
then you have to put the square root in to answer it so the answer must be
y=+ or - 7
---------------------------------------------------
does that make sense?

Melody17 dic 2013