Jedithious

16 Questions
24 Answers

0

4139

6

+154

the sin of 150 degrees

Hi,

Here's a short problem which I can in fact do on my own but I'd just like to know what the shortest most efficient method of solving it is:
прочитайте больше ..

SevenUP ●●●●●●

Jedithious 1 июл. 2014 г.

0

2873

6

+154

Pendulum Trigonometry

Here's a tricky one that I could use an explanation and answer to:
прочитайте больше ..

Alan ●●●●●●

Jedithious 1 июл. 2014 г.

0

3754

6

+154

Capilano Suspension Bridge Problem

A trigonometry problem:
прочитайте больше ..

heureka ●●●●●●

Jedithious 25 июн. 2014 г.

0

995

3

+154

Moons of Saturn Problem

Here's a surface area ratio problem of which I could use some help:
прочитайте больше ..

Jedithious 25 июн. 2014 г.

0

1663

7

+154

Measurement problem (1)

Here are a few measurement problems I would appreciate some help with:
прочитайте больше ..

Alan ●●●●●●●

Jedithious 14 июн. 2014 г.

+8

1878

11

+154

Fraction Problem

Hi,

It would be great if someone could explain the process entailed in solving this problem:
прочитайте больше ..

Rom ●●●●●●●●●●●

Jedithious 16 мая 2014 г.

0

1052

2

+154

Graphing Conic Sections

Hello,
I was wondering if anyone knows of any apps that can graph such things as ellipses, circles, and hyperbolas?
I certainly have a few apps in which you can enter a function and get a graph for it, but what about being able
to input such прочитайте больше ..

Jedithious 6 апр. 2014 г.

0

1012

4

+154

Hi, it would be great if someone could give me explanations for how to solve this species of math problem:

Hi, it would be great if someone could give me explanations for how to solve this species of math problem:
Write an expression for the distance between each pair of points (in terms of coordinate geometry).
a) (a, b) and (2a, 2b)
b) (x, 2y) прочитайте больше ..

Jedithious 16 мар. 2014 г.

0

935

2

+154

Coordinate Geometry

Hi,
there are a few coordinate geometry problems giving me trouble:
1. "The vertices of a right triangle are S(-2,-2), (T(10, -2), and R(4,5). Find the area of the triangle."
(I got 42 square units as the answer but the book says the answer прочитайте больше ..

Jedithious 11 мар. 2014 г.

0

1069

2

+154

Chess tournament Problem

The contestants in a chess tournament were numbered from 1 to 18. When the players were paired for the first game, the sum of the two numbers for each pair was a perfect square. What were the pairings for the first game?

Jedithious 27 янв. 2014 г.

0

919

3

+154

Mean/Average

"The mean or average of six numbers is 33. Four identical numbers are added, and the new mean of the ten numbers is 39. What is the value of each new number added?"

Jedithious 27 янв. 2014 г.

0

1163

3

+154

Hello, I'm on a page in my math book with all sorts of fun but slightly unusual 'using the strategies' problems. Most of the problems require specific

Hello, I'm on a page in my math book with all sorts of fun but slightly unusual 'using the strategies' problems. Most of the problems require specific techniques and or some degree of creativity to solve. I shall post all the problems that I could use help прочитайте больше ..

Jedithious 27 янв. 2014 г.

0

1730

16

+154

Alteration of Digits in Integers Problem

How in the world does one go about solving this? Is it even possible? It must be if it is on a math test...(An Olympiad Test, mind you.)
"Which integers have the following property? If the final digit is deleted, the integer is divisible by the new number? прочитайте больше ..

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Jedithious 1 дек. 2013 г.

0

934

2

+154

Palindrome Problem

What is the procedure to solve a problem like this?
A number is palindromic, if it is the same backwards as forwards.
Of the largest palindrome made from the product of two two-digit numbers, find one of the numbers.
a) 92
b) 89 c) прочитайте больше ..

Jedithious 30 нояб. 2013 г.

0

961

5

+154

Posting

Is there a limit to how many posts one can make in, say, an hour (or a day)?
Like, theoretically could one submit a a thousand different questions in one day if one was actually genuinely curious enough?
Or is there a certain number limit which when прочитайте больше ..

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Jedithious 30 нояб. 2013 г.

+154

+5

Thank-you, CPhil, Melody, and Alan for taking the time to help out! As always, much appreciated.

Jedithious16 июн. 2014 г.

+154

+8

Rom and CPhill:

Yes, evidently quite a workout! Thank you both for taking the time to do it and explain it so methodically. I feel like my comprehension of the answers you gave to this particular problem has increased my confidence in converting word problems to workable algebra formulas more than perhaps any other word problem I've recently encountered. Much appreciated!

Melody:

Thanks for the tip; done, and will be sure to do in the future. And its great to see you too! Haha, nice glasses, yes. How's the weather in Sydney this time of year?

Jedithious18 мая 2014 г.

+154

0

Hi Melody,

Thank you, its simpler than I suspected.
Yes, checking would be appreciated

b) sqrt [ x^2 + 9y^2 ]
c) sqrt [ 4 + n^2 ]
d) sqrt [ 20p ]

Jedithious16 мар. 2014 г.

+154

0

Thank you, that did indeed help.

Jedithious13 мар. 2014 г.

+154

0

Hello Melody, likewise.

This has always been an area of math I've lagged behind in, being for some reason daunted by it. But with your thorough explanation combined with that amazing link, that lag is suddenly no longer. I believe the answers to the other two are:

"In how many different ways can you arrange 9 blue blocks and 9 red blocks in a straight line?"
18! = 6,402,373,705,728,000
6,402,373,705,728,000/(9!) = 17,643,225,600
17,643,225,600/(9!) = 48,620

"In how many different ways can you arrange 25 blue blocks and 25 red blocks in a straight line?"
50! = 30,414,093,201,713,376,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
30,414,093,201,713,376,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000/(25!) = 1,960,781,468,160,819,281,929,913,523,584,869,531,669.8921948310508777
1,960,781,468,160,819,281,929,913,523,584,869,531,669.8921948310508777/(25!) = 126,410,606,437,751.9912453104638169556

Thank-you

P.S. That entire site is really delightful. I especially like the Pascals Triangle section.

Jedithious28 янв. 2014 г.

+154

0

Hello Walt,

That helped very much indeed. Not only did you give me a precise formula that explains the structure of this general type of problem but you left me the fun of solving it.

Thanks

Jedithious27 янв. 2014 г.

+154

+3

735 probably wins...
This problem has been tormenting me for the last 15 minutes and I definitely suspect that its one of those impossible combinations.
My suggestion:
Since a combination that is impossible is frustrating and confusing, perhaps the best way to play this would be for the person
who composes the combination to begin with the magic number and then divide, subtract, multiply and/or add numbers backwards
until it equals zero. This way the combination will always be possible and we won't have to worry about nasty impossible ones
creeping up every now and then. Of course that person won't be able to compete, but that's
not really much of a problem at all.

Jedithious30 дек. 2013 г.

+154

+3

It truly is.
By the way, do you know whether the system you gave to devise numbers and the magic number is flawless? Like are there any possible combinations that won't have an answer (are impossible) or does the system automatically garuntee the perfect playability of any and all possible combinations?

Jedithious30 дек. 2013 г.

+154

+3

Hello Melody,
Yes, I just chose the first numbers that came to me.
That sounds reasonable.
Don't you think it would be wonderful if this game could become
like a frequent thing/tradition for this forum?
Its just so snappy, fun, and probably healthy for the brain.

p.s. The beautiful Los Angeles, California

Jedithious30 дек. 2013 г.

+154

+9

Hello Melody,
Yes, I just got back from a long trip. Was missing this place...
Sure, I'd like to offer the numbers. Will I still be able to participate/play, though, for that round?

7, 7, 3, 25, 75, 100 where the magic number is 734

Jedithious30 дек. 2013 г.