Mathematics - 19 October 2007

2007-10-19 23:00:20 · 2 answers · asked by paymanvr 1

If 4^x - 2^(x+1) += 48, find x.

my teacher gave us this homework without further explanation. i can't find in our books how to solve this. please help.

2007-10-19 21:26:56 · 5 answers · asked by bobosamath 1

What is the only positive value of b for which (x+b)^2 = x^2+2bx+b^3 is an identity for all real values of x?

---

If x + y = 1, x^3+y^3 = 19, find the values of x^2 + y^2.


please show me the step by step process.

2007-10-19 21:23:24 · 7 answers · asked by bobosamath 1

use x=u^2
integrate between limits 36 and 0
integral 1/(x^1/2(2+x^1/2))dx
and show it equals: ln 16
thanks

2007-10-19 20:39:11 · 6 answers · asked by Anonymous

here is a problem with solution uploaded

http://docs.google.com/Doc?id=dc83hzcs_177hfz3dr

i don't understand the solution
can you please explain ?

2007-10-19 20:12:56 · 1 answers · asked by calculus 1

How many pixels equal 3.5 x 5 inches?

2007-10-19 20:00:55 · 8 answers · asked by deathuser94 2

x 1 2 3 4
f 2 3 4 1

2007-10-19 19:53:10 · 2 answers · asked by inayat u 1

2007-10-19 19:00:53 · 9 answers · asked by Anonymous

Hi everyone;

I just need someone to do a sample of simplex method, i already did it, but i am not sure if i did right.

maximize p= 10x + 12y
Sub with : x+2y<12
and 3x+2y<24

Thx
Adi

2007-10-19 18:35:25 · 2 answers · asked by Anonymous

We know that
A glass filled up to half it's height = A half full glass ---(1)

We also know that
A glass filled up to half it's height = A half empty glass ---(2)

Comparing equations (1) and (2), since the Left hand side of both equations are same, so we can say that right hand sides of both equations will be same, i.e.

A half full glass = A half empty glass ---(3)

Multiplying equation (3) by 2 on both sides, we have
2 x half full glass = 2 x half empty glass ---(4)

Alternatively equation (4) can be written as
A full glass = A Empty glass

What is wrong in above proof?

2007-10-19 18:27:22 · 9 answers · asked by xitiz b 2

2007-10-19 18:03:07 · 11 answers · asked by Anonymous

just imagine u r selling eggs. and one customer came to u and ask 'i wanna buy half of the eggs and half of 1 egg'. after 1 hour another customer came and ask the samething. and after one more hour another customer came and ask the same thing. after u sell the eggs to the three customer, u have no egg left.

now the q is HOW MANY EGGS DID U HAVE BEFORE U SELL ANY?

{P.S. u can't brake any eggs}

plz write the ans with how he sell the eggs...... u will get 10 points based on what, how, & how long u described......

2007-10-19 17:37:08 · 2 answers · asked by RIK 2

i need help

2007-10-19 17:24:11 · 5 answers · asked by killa swagg 2

I appreciate anyone explaining how and why ?

Thanks

2007-10-19 17:16:35 · 2 answers · asked by skull101a 1

Given the marginal utilities of two goods, how do you find the utility function?

I know if you were given the utility function, you can find the marginal utilities of both goods by partially differienating. However...how do you go backwards? I'm assuming we are dealing with intregals but...I'm still lost.

thanks!

2007-10-19 17:12:27 · 1 answers · asked by jessie 1

fully factor this

16x^4 - 12x^2 + 1



PLEASE SHOW ALL WORK OR DONT BOTHER

best answer gets 10 big points

2007-10-19 17:11:04 · 5 answers · asked by Anonymous

2007-10-19 17:07:12 · 2 answers · asked by susan 1

2007-10-19 16:52:48 · 5 answers · asked by ausomadam 1

1) -4+10+3y/8=0
2) 1/4y-2/3=1/2
3) y/6+y/4= -1
4)-y/6-1=5
5)6-1/8
thanks

2007-10-19 16:46:06 · 1 answers · asked by Anonymous

Solve the equation ay/x = cz for each of the following

the variable y
the variable z
the variable x

2007-10-19 16:44:54 · 8 answers · asked by Anonymous

solve for x

abx = cy

2007-10-19 16:19:54 · 10 answers · asked by Anonymous

For time t > 0, in years, the company’s extraction plan is a linear declining function of time as follows:
,
where q(t) is the rate of extraction of oil in millions of barrels per year at time t and b = 0.1 and a = 10.

(a) If it takes 10.6 years to exhaust the reserve and the oil price is a constant $20 per barrel, the extraction cost per barrel is a constant $10, and the market interest rate is 10% per year, compounded continuously. What is the present value of the company’s profit?

2007-10-19 16:17:37 · 3 answers · asked by fijiprize 1

x^5/4-4x^1/4=0

2007-10-19 15:53:23 · 3 answers · asked by Dill K 1

solve the formula for the indicated variable
P-3Q/7=P+5/2 (+1 ) for P

2007-10-19 15:51:57 · 8 answers · asked by Dill K 1

2007-10-19 15:48:05 · 7 answers · asked by ausomadam 1

Find the value of x.

a) 3x + 1 = 2
------------------
5 7
5 should be under 3x+1 and the 7 should be under 2

2007-10-19 15:47:42 · 6 answers · asked by Anonymous

its kindu trikee......not vary good at math :)

2007-10-19 15:46:57 · 16 answers · asked by zach 2

I was thinking basically when you break all math down it all adds up to me you multiplying and subtracting numbers and variables in the correct way right?
And what is the highest hardest level of math to all people including college professors and isn't there any way we could even get better forms of math even more fundamental then calculus. I'm sure they're is.

Thank you I know that I asked a lot of questions.

Thansk alot and god bless

2007-10-19 15:39:42 · 2 answers · asked by Luvon 3

public int sumOtherDiag()
{
int b = square.length - 1;
int i = 0;
int sum = 0;
while(i <= square.length - 1 && b >= 0)
{


sum = sum + square[i][b];
i++;
b--;
}
return sum;
}
does not sum correctly for 4by4 square with all 5s it gives me 15.
The other diagonale is:
*
*
*
*

2007-10-19 15:36:26 · 2 answers · asked by Jake L 3

2007-10-19 15:35:48 · 4 answers · asked by ausomadam 1