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#1 Re: Help Me ! » some problems » 2015-08-24 11:52:04

Hello cooljackiec,
I've noticed that you have been posting many AoPS problems along with their official diagrams.
Please remove them as they constitute plagiarism and cause a permanent record that students who are attempting to solve the problems will see.
Thank you.

#2 Re: Help Me ! » Algebra Question » 2015-07-28 06:24:24

Yup! smile

***This topic is now resolved.***

#3 Re: Help Me ! » some squares and a triangle... » 2015-07-28 06:23:20

Can someone help me prove that

? Thanks.

#5 Re: Help Me ! » Two circles' intersection » 2015-07-28 05:11:17

I have solved this. Thank you for the help.

***This topic is now resolved***

#6 Re: Help Me ! » Algebra Question » 2015-07-27 08:58:03

Ahhhh, yes. I didn't think of that. However, I'm not sure what the values should be. How do we transfer

into
?

#7 Re: Help Me ! » Two circles' intersection » 2015-07-27 08:55:19

Yup! Thanks! I will be using it from now on! smile

#9 Re: Help Me ! » geometry problems » 2015-07-27 05:28:06

Can someone explain how to get the answer for Q4? Thanks.

#10 Re: Help Me ! » Point inside a square » 2015-07-27 02:42:37

^^ Why does it just say Submit with a img symbol? ^^

#11 Re: Help Me ! » Two circles' intersection » 2015-07-27 02:33:17

Wait, where did you post the LaTeX help? <-----
____________________________________________________________________________________________________________________________________________________________

I got the Geogebra thing. I've used Geogebra before, but not the spreadsheet. I've learned it now. Thanks.

#12 Help Me ! » Two circles' intersection » 2015-07-26 03:41:21

RandomPieKevin
Replies: 7

The circles

and
intersect in two points A and B. Find the slope of
.

I got

, but I don't know what do do next! (\pm is plus or minus, and it's from the quadratic equation). I got that answer by expanding the second equation and using the first equation to find what x^2 and x are in terms of y. Then, I substituted them in and solved. I don't know what to do next now.

Can someone help me solve this? Thanks.

#13 Help Me ! » Algebra Question » 2015-07-25 04:00:28

RandomPieKevin
Replies: 8

Let

. Find the constant
such that 
for all real numbers
.

Can someone help me solve this? I would like some help in how to solve it and what direction I should start. Thanks.

#16 Re: Help Me ! » Circle Geo Problems » 2015-07-23 06:22:46

Can you explain how you got it? Thanks.

#17 Re: Help Me ! » 3d geometry? » 2015-07-22 07:19:59

Wait, I got 20pi... It's wrong! I got 1/4\pi as the volume of the top and 81/4\pi as the volume of the whole thing.

#18 Re: Help Me ! » 3d geometry? » 2015-07-22 06:08:02

How did you get the base as 20-2x?

#20 Re: Help Me ! » 3d geometry? » 2015-07-21 05:29:27

Oh, so the cross-section is vertical? And that tiny triangle is the top part of the cone?____________________________________________________________________________________________________________________________________
How did you get the base as 20-2x?
____________________________________________________________________________________________________________________________________How do you know that JD=x?

#21 Re: Help Me ! » geometry problems » 2015-07-18 05:56:59

@bobbundy
I posted something there. Can you help me there? Thanks.

#22 Re: Help Me ! » 3d geometry? » 2015-07-18 05:55:57

championmathgirl wrote:

I used a simpler algebra way to find x. Because you could use Pythagorean Theorem and write the base as 16+2x. Then since we also have the base as 20-2x. Setting them equal to each other we get x=1. Then use the ratios y/(y+10)=x(10-x) to find y.

I don't know which base you guys are talking about. Also, is x the radius of the inscribed circle?

#24 Re: Help Me ! » Math 3-D Geometry Proof Help! » 2015-07-10 06:35:59

Can you guys help me prove that PR is a straight line? Thanks.

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