I'll post an easy one to start:

3x+9y=12

2x+4y=8

x=?

y=?

Post answer first, then another problem please

## 190 Replies - 9254 Views - Last Post: 21 May 2009 - 12:03 PM

##
**Replies To:** Math Nerds UNITE!

### #2

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 09:18 AM

Student Lounge....

y = 0

x = 4

y = 0

x = 4

### #4

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 09:26 AM

neotifa is right!

Ok my turn.

This one's easy.

What's the derivative of 3x^3 - 3(4^5)^3

Ok my turn.

This one's easy.

What's the derivative of 3x^3 - 3(4^5)^3

### #5

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 09:29 AM

9x^2

This post has been edited by **cfoley**: 09 April 2009 - 09:31 AM

### #6

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 09:36 AM

thats right..for the first halve

### #7

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 09:37 AM

(5i*3i-(-6)^3)/3

*note*i denotes "imaginary numbers" It is not a variable

*note*i denotes "imaginary numbers" It is not a variable

### #8

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 09:40 AM

well, the second half is a constant so that goes to:

0[3(4^5)^3]^-1

=0

I didn't see any point adding + 0.

Solve for x:

log(x) + 1= x^2

Whoops that was impossible. Fixed!

0[3(4^5)^3]^-1

=0

I didn't see any point adding + 0.

Solve for x:

log(x) + 1= x^2

Whoops that was impossible. Fixed!

This post has been edited by **cfoley**: 09 April 2009 - 09:50 AM

### #9

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 09:46 AM

and that right!!! I was really just looking for you to write down the simplified derivative, but that is acceptable.

### #10

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 10:07 AM

### #11

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 10:14 AM

You forgot to square the "i" and you must've missed the other minus sign.

### #12

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 10:31 AM

No, then you didn't put the parenthesis in the right spot.

### #13

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 10:35 AM

You cube the -6 which gives you -216, and 5i*3i is an integer

### #14

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 11:00 AM

There used to be a thread in the

Those questions were a bit tougher though..

The answer was -77 btw

*Games/Puzzles/Trivia/Jokes*thread called**Calculate this**.Those questions were a bit tougher though..

The answer was -77 btw

### #15

## Re: Math Nerds UNITE!

Posted 09 April 2009 - 11:32 AM

no. ok If you multiply imaginary numbers, you get a negative number, since 1i = sqrt(-1) so 5i *3i = -15. so -15-(-216)=?

This post has been edited by **C++LVR**: 09 April 2009 - 11:32 AM