Mathematics - 4 November 2007

if LN = 42 find x
i keep getting x = 17 =(

2007-11-04 12:14:48 · 2 answers · asked by cow man 1

2x+5y=negative 4
3x-y=11

please explain step by step how to solve

2007-11-04 12:12:19 · 7 answers · asked by erica200538 2

m4 + m4 = 100m2 + m

(note: the 4's and the 2 are expontents)

2007-11-04 12:10:57 · 7 answers · asked by Raquel C 1

what is the product of (x + y)^3??

2007-11-04 12:08:00 · 7 answers · asked by Riddle 1

Find a quadratic equation for which the solutions are 3 and 5

I cant figure out how to do it :/

2007-11-04 12:05:46 · 11 answers · asked by Brandon A 1

An investment of $4000 grows at the rate of 320e^(0.08t) dollars per year after t years. Its value after 10 years is approximately

(A) $4902 (B) $8902 (C) $7122 (D) $12,902 (E) None of these

2007-11-04 12:03:57 · 3 answers · asked by klv0808 1

The time between the arrival of electronic messages at your computer is exponentially distributed with a mean of two hours.

a) What is the probability that you do not receive a message during a two-hour period? (round to 3 significant digits.)

b) If you have not had a message in the last four hours, what is the probability that you do not receive a message in the next two hours? (round to 3 significant digits.

c)What is the expected time between your fifth and sixth messages?_______ hours

thank you!

2007-11-04 12:03:53 · 1 answers · asked by Jack 1

Find the derivative:

1) g(t)= sq. rt.(1/t^2-2)

2) h(x)= sin 2x cos 2x

And did I do these two right?
Find an equation of the tangent line to the graph of f at the given point:
3) y=2tan^3, (pi/4,2)
y^1= 6(tan^2x)(sec^2x)
= 6(tan(pi/4)^2)(sec(pi/4)^2)
= 6(1)(2)
=12
Find the 2nd derivative of the function:
4) f(x)= 1/x-2
f^I(x)= -1x^-2
f^II(x)= 2x^-3

2007-11-04 12:03:34 · 2 answers · asked by harmony8423 1

There are plenty of proofs and reasons as to how and why they are equal.

But, inductively, it seems fairly obvious that 0.999 isnt the same as 1... its just slightly smaller... infinitesimally smaller.

Can anyone give sound logic as to why they are not the same?

2007-11-04 12:03:22 · 4 answers · asked by Anonymous

2007-11-04 12:00:51 · 11 answers · asked by madison n 1

2007-11-04 12:00:34 · 10 answers · asked by ? 2

(x^4 + x^3 - 3x - 3) divided by (x + 1)

2007-11-04 12:00:33 · 7 answers · asked by Riddle 1

2007-11-04 11:59:57 · 9 answers · asked by madison n 1

2007-11-04 11:58:42 · 7 answers · asked by madison n 1

2007-11-04 11:56:30 · 4 answers · asked by Danielle 1

I really need help with my trig. homework. Well the question is.....Given the radian measure of a central angle, find the measure of its intercepted arc in terms of π in a circle of radius 10 cm.

16.π/4(fraction not divid)

i need to know how to do it i dont understand

2007-11-04 11:53:28 · 2 answers · asked by AMBER 1

An elastic band is hung on a hook & a mass is hung on the lowere end of the band. When the mass is pulled downward and then released, it vibrates verticaly. The equation of this motion is s(t)=2cos(t)+3sin(t),t> or = 0

2007-11-04 11:53:27 · 3 answers · asked by GABY a 2

2007-11-04 11:51:34 · 10 answers · asked by madison n 1

let r(x)=f(g(h(x))) where h(1)=2 ; g(2)=3 ; h`(1)=4 ; g`(2)=5 ;
f `(3)=6 find r`(1)


differentiate

y=(x)(cos^-1)(x) - sqr root (1-x^2)


really need some help!

2007-11-04 11:34:49 · 2 answers · asked by jenny 2

Check this question:

http://answers.yahoo.com/question/index;_ylt=AiKobJxCAaRYm8wci.6glo_sy6IX;_ylv=3?qid=20071103182545AA1l69b&show=7#profile-info-d80dc8bc16566bd4b6363642fd3d9034aa

Take the simpler 2D problem of finding minimum total sum of distances from a point on the plane to n other points. A local minimum is a point where this total sum of distances to the other n points is a minimum only locally about the point, but not necessarily minimum for the entire plane. Do such local minimums exist other than the one that's the minimum for the entire plane? If yes, can you give an example, if not, can you show why?

As smci mentions, in the case of n = 3, this minimum is called the Fermat Point.

2007-11-04 11:25:42 · 1 answers · asked by Scythian1950 7

when looking at an equation, how do you determine if it's linear? Everything I've found just shows how to solve them, but not how to differentiate if it is linear or not. For example, the problems I am working are:

Are the following equations linear?
1. 2x-y = 5
2. –x+5y=0
3. x = -1
4.y +x^2 = 5

2007-11-04 11:19:31 · 5 answers · asked by dustin_r_85 1

The tangent line to the graph of f(x)=x^2+5x-24 at x=8 meets the x-axis at an angle AOB whose tangent is _____. The angle AOB measures ____ radians.

2007-11-04 11:18:51 · 2 answers · asked by ws 3

a)Solve the differential equation:
dT(t)/dt=k(T-tsubm)
k is a constant
T(t) is the temp of object for t>0
Tsubm is the ambient temperature
T subm iss constant

b) T(0) =T sub 0

2007-11-04 11:08:28 · 1 answers · asked by aba 2

Hi i am having trouble finding this equation Y= Bo +B1X1+B2X2+e when given: n=10 Sum Xi1=223 SumXi2=553 Sumyi=1916 SumX^2i1=5200.9 SumX^2i2 = 31729 SumXi1Xi2=12352 SumCi1Yi=43550.8 SumXi2Yi=104736.8 and SumY^2i = 371595.6

2007-11-04 10:52:10 · 1 answers · asked by elemnt55 1

2007-11-04 10:43:37 · 2 answers · asked by Anonymous

area of the pool without sidewalk is 1000ft^2. let x be the length of one side of the pool .
the pool is required to have a walk of uniform width 2 ft surrounding it.

how do you find the dimensions of the plot of land (pool plus sidewalk).that has the least area. what is the least area?

2007-11-04 10:21:52 · 2 answers · asked by samuraiexe 1

I am trying to apply for a job and I forgot my algebra can you guys help me. please..

2007-11-04 10:18:31 · 8 answers · asked by Anonymous

can someone help me with this problem?
A rectangle is inscribed in a circle of radius 2007. If the diagonals form a forty-five degree angle, then what is the area of the rectangle?
plz show work. Thanks.

2007-11-04 10:16:38 · 1 answers · asked by sitting_ducks 1

HERES ANOTHER ONE WHAT DOES MCMXXIV

2007-11-04 10:15:09 · 11 answers · asked by Anonymous

find the exact value of the log : log subscript 4 1/64 = x
thanks

2007-11-04 10:10:05 · 6 answers · asked by Boo Radley 4