Mathematics - 26 September 2006

2006-09-26 16:55:42 · 4 answers · asked by nsgp12 1

no not a joke please be sensible i needto know

2006-09-26 16:50:28 · 16 answers · asked by Anonymous

I need help on this problem:

(-2b - 9)/(b2 + 7b + 12) = b/(b + 3) + 2/(b + 4)

I tried doing this, but it was no good. Help please?

(-2b - 9)/(b2 + 7b + 12) = b/(b + 3) + 2/(b + 4)
(-2b-9)/(b+3)(b+4) = b(b+4)/(b + 3)(b + 4) + 2(b+3)/(b + 3)(b + 4)
(-2b - 9)/(b + 3)(b + 4) = (b^2+4b+2b+6)/(b + 3)(b + 4)
(-2b - 9) = (b^2+6b+6)
0 = b^2 +8b + 15
0 = (b+5)(b-3)
b = -5, 3

2006-09-26 16:38:39 · 6 answers · asked by reid296 2

2006-09-26 16:37:57 · 13 answers · asked by nsgp12 1

I was given the two points (0, 0) and (5, 12). How do you find what y is equal to. I have the given answer: y=(12/5)x, but I can't figure out how the book got that.

2006-09-26 16:34:48 · 8 answers · asked by ecogrl23 2

Some of you may know this formula for the mass of an object near the speed of light (where m0 is the initial mass, v the speed and c the speed of light) :

m = m0 / (1 - v^2/c^2 )^½

I have to find dm/dv. I know it's something like dm/dt * dt/dv but I cant find the link...

Help me please !

2006-09-26 16:26:14 · 4 answers · asked by Vee A 1

A stamp collection consist of 3 cents, 8 cents, and 13 cents stamps. The number of 8 cent stamps is three less than twice the number of 3 cents stamps. The number of 13 cents stamps is twice the number of 8 cent stamps. The total value of all the stamps is 2.53. find the number of 3 cent stamps in the collection.

PLEASE HELP!

2006-09-26 16:24:20 · 3 answers · asked by Sowatup 1

Two airplanes start at the same time and fly toward each other from points 1000km apart at rates of 420 km/h and 330 km/h. When will they meet?

2006-09-26 16:17:01 · 7 answers · asked by Solari 1

On a weekend outing, Antoine rents a motorboat for 8hr to travel down the river and back. The rental operator tells him to go for 3hr downstream, leaving him 5hr to return upstream.
a)If the river current flows at a speed of 6mph, how fast must Antoine travel in order to return in 8hr.
b)How far downstream did Antoine travel before he turned back?

2006-09-26 16:13:27 · 2 answers · asked by Solari 1

2006-09-26 16:09:12 · 6 answers · asked by Anonymous

2006-09-26 16:04:44 · 14 answers · asked by Anonymous

2006-09-26 16:00:36 · 16 answers · asked by kevin 2

2006-09-26 15:49:10 · 8 answers · asked by singleton_03 1

2006-09-26 15:38:31 · 17 answers · asked by donna.rawls@sbcglobal.net 1

18 divided by 6/13, my calculator got 39 but how?
-64 times 5/4.
How do you do these?

2006-09-26 15:24:53 · 5 answers · asked by No name 1

2006-09-26 15:24:46 · 2 answers · asked by mysol v 1

2006-09-26 15:13:21 · 8 answers · asked by mag c 1

do i need to find the intersection of 4^x and 7, then plug that # into 4 ^ - 2x ? thanks for your help.

2006-09-26 15:13:02 · 7 answers · asked by shih rips 6

Two miles upstream from his starting point, a canoeist passed a log floating in the river's current. After paddling upstream for one more hour, he paddled back and reached his starting point just as the log arrived. Find the speed of the current.

Please help me find the answer to this question ASAP. Also, please explain this problem thoroughly so that an eigth grader can understand it. Thanks!!!

2006-09-26 15:11:57 · 3 answers · asked by sonia 1

In this link (it's just a picture), is an equation;

http://img.photobucket.com/albums/v638/ravenatic20/untitled1.jpg

Can you give a reason that justifies the equation, using the 6 general laws of arithmetic (assoc., dist., comm.) and the basic laws of fractions?

2006-09-26 15:10:41 · 3 answers · asked by Anonymous

As a bus approaches a turn it goes from 30 m/s to 5 m/s in a space of 5 seconds. What was its acceleration?

2006-09-26 14:55:31 · 6 answers · asked by Helena 1

2006-09-26 14:52:31 · 6 answers · asked by Anonymous

lim x -> 5- e^x/(x-5)^3. I got oo.

2006-09-26 14:51:25 · 5 answers · asked by Anonymous

Prove if true.

2006-09-26 14:48:10 · 4 answers · asked by kuxuru 3

2006-09-26 14:44:27 · 6 answers · asked by mag c 1

its derivatives of logarithmic functions

how do you find y ' if x^y = y^x

2006-09-26 14:41:06 · 6 answers · asked by softball579 1

2006-09-26 14:39:02 · 6 answers · asked by mysol v 1

f(x) = 2 - e ^ (x / 2)

isn't domain usually (-oo, oo) ?
how do you find range? do i need to set it up as an inequality where its ">0" ? steps and an explanation would be helpful. thanks for your help.

2006-09-26 14:37:38 · 3 answers · asked by shih rips 6

As a bus approaches a turn it goes from 30 m/s to 5 m/s in a space of 5 seconds. What was its acceleration?

2006-09-26 14:33:53 · 5 answers · asked by Helena 1

As a bus approaches a turn it goes from 30 m/s to 5 m/s in a space of 5 seconds. What was its acceleration?

2006-09-26 14:33:48 · 5 answers · asked by Helena 1