Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
read more ..

Melody Apr 2, 2022

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609

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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. read more ..

Melody Mar 16, 2022

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8

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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 read more ..

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Melody Mar 15, 2022

-3

871

3

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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

off-topic

Melody Mar 13, 2022

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WELCOME BACK CPHILL !

Melody Feb 11, 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. read more ..

Melody Feb 1, 2022

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889

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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 read more ..

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Melody Jan 9, 2022

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996

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HAPPY BIRTHDAY CHRIS!

Melody Dec 20, 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 read more ..

off-topic

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Melody Nov 4, 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

off-topic

Melody Oct 29, 2021

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0

Replace y in the first equations with (2x+12) and then solve for x

then substitute your x value into either original equation to get y.

MelodyOct 25, 2013

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0

(-5)+(-6)

= -5+-6

If 2 signs (+ or -) are so close together that you can put a circle around them with nothing else in the circe, the

if the signs are the same, replace them with a plus

if the signs are different, replace them with a minus.

Your question has a +- they are different so replace with a -

=-5-6

Now, start at -5 on a number line and go 6 places in a negative direction.

= -11

MelodyOct 25, 2013

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0

3.2million * 1.02^100

MelodyOct 25, 2013

+118724

0

If I understand your question properly, which I may not, then

It is 64 degrees because they are alternate angles on parallel lines.

MelodyOct 25, 2013

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0

If f(t)=5/t

[ f(t)-f(a)] / (t-a)

= [5/t - 5/a] / (t-a)

=(5a-5t)/(at) * 1/(t-a)

=-5(-a+t)/(at) * 1/(t-a)

=-5/(at)

MelodyOct 25, 2013

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0

It depends what you are talking about

The inverse of 6 is 1/6

but if
tan(theta) = 0.35
Inverse tan 0.35 = theta

MelodyOct 25, 2013

+118724

0

sqrt3(24^3) = (sqr3) * 24*24*24

You can't simplify sqr of 3 because it is already as simple as it can be.
24*24*24 you can do by long multiplication.

MelodyOct 25, 2013

+118724

0

10 rabbits at first then five years later 340 rabbits.
give a formula for the population of the colony of rabbits as a function of the time

a=10, r = rate of yearly increase, R = number of rabbits after n years.

340=10*r ⁵
34=r ⁵
r = 34^(1/5)
r = 35^0.2

R _n = 10 * [34^0.2] ⁿ

R _n = 10 * 34 ^(0.2n)

This is based on the premise that rabbits increase in number yearly as a geometric progression, which, of couse, they do not.

MelodyOct 25, 2013

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0

Hi IQ
I get six, how did you get 9?
8*7=56
7*6=42
6*5=30
5*4=20
4*3
3*2=6

MelodyOct 24, 2013

+118724

0

Weren't you going to enter some scores?

MelodyOct 24, 2013