Mathematics - 7 November 2007

6x^2-31x+28=0


answers given are x=4 and 7/6

2007-11-07 13:45:56 · 1 answers · asked by Anonymous

A main claims to be able to distinguish between scotch and bourbon 80% of the time. A test of 15 samples is given to him and, if he is correct at least 12 times he proves his claim. What is the probability his claim is justified, but he doesnt pass the test?

2007-11-07 13:28:37 · 2 answers · asked by amshamah 3

now x=2
1.4x+9x+8x=
2.-6x+11x+(-2x)=
3.-3x+8+2x+(-3)=
4.11x+(-5)-3x=
5.-13x+15x-6=

2007-11-07 13:27:43 · 8 answers · asked by Alexia M 1

How do we do these?

Determine whether a quadratic model exists for each of values. If so, write the model.
A. f(0) = 5, f(20 = 3, f(-1) = 0

Dont they need like a ^2 to be quadratic?

2007-11-07 13:26:49 · 1 answers · asked by Joah 3

i need to prove that the series n^2 / ((n^4) +1) converges

how do i go about doing this? should i reduce the function first?? And what function do i compare it to?
NOTE: I must use the comparison test.

2007-11-07 13:25:24 · 5 answers · asked by starz8 2

Let p represent any positive number. Being as specific as possible, describe the type
of triangle with vertices at (0,0), (p, 0), and (0, p).

2007-11-07 13:17:39 · 3 answers · asked by Anonymous

Please explain.

2007-11-07 13:14:48 · 2 answers · asked by Bobby S 3

find dy:

xy^2 - 4x^(3/2) - y = 0

2007-11-07 13:08:37 · 1 answers · asked by Anonymous

2007-11-07 13:05:36 · 2 answers · asked by Your mom 1

this has to do with direct products


list a group of order 81 with the property hat every element except the identity has order 3

don' even know where to start

2007-11-07 13:05:34 · 2 answers · asked by mlbabe03 2

I'm not sure how to go about doing this. You don't have to answer it, but explain how I can do it.. somehow.. Thanks!!

A graph has the following key features:

Decreasing for x > 0
y-intercept of 1
No x-intercept
A horizontal asymptote of y = 0
Domain: {x|xER}
Range:{y|y > 0, yER}
(1, 0.5) is a point of the graph

A possible function with these key features is....

2007-11-07 13:04:37 · 1 answers · asked by ms_lotr_freak 3

steps please...

2007-11-07 13:03:44 · 1 answers · asked by MusicLuvr 5

The next 2 answers would obviously be 6^7 and 7^8, but, I want to be able to work that out with a formula.
I can not figure out which formula to use with this question. Is there anyway to easily determine if it is arithmetic or geometric?
I am able to do these, however this one has me stumped as it uses - to the power -.
Any help would be greatly appreciated

2007-11-07 13:03:40 · 2 answers · asked by Crystaline 3

cos (theta) + 6 sec (theta) = - 7

2007-11-07 12:57:40 · 1 answers · asked by jigsawtaz 1

click on this site
http://www.digicc.com/fido/
how does this work??
they get it right everytime!!!

2007-11-07 12:42:19 · 4 answers · asked by Anonymous

find the sum of the reciprocals of the first positive powers of three. express your answer in as a common fraction

please show how u got the answer.

THIS ISN'T A HW QUESTION

PLEASE PLEASE SHOW UR WORK

2007-11-07 12:33:04 · 2 answers · asked by Anonymous

40 degrees is what fractional value of the whole circle...(the circle equals 360)

2007-11-07 12:24:48 · 10 answers · asked by monica s 1

How do you do this?

Show that the area of a regular polygon of n sides, each of length a is given by A=1/4n(a*a)cot(pi/n).

2007-11-07 12:24:31 · 1 answers · asked by Mia 2

A computer is infected with the Sasser virus. Assume that it infects 20 other computers within 5 minutes; and that these PCs and servers each infect 20 more machines within another five minutes, etc. How long until 100 million computers are infected?

2007-11-07 12:17:05 · 2 answers · asked by Snoopy Baby 1

How do you prove:

inverse sin x + inverse cos x = pie/2 ?

(inverse sinx = arcsin x) ( inverse cosx = arccosx)

2007-11-07 12:02:04 · 1 answers · asked by anan21uk 1

attached to the object. If the rope makes an angle θ with a plane, then the magnitude of the force is given below, where μ is a constant called the coefficient of friction.

F = (μ * W) / (μ * sin( μ ) + cos( μ ))

1) For what value of θ is F the smallest?

2) What is the smallest value of F?

2007-11-07 12:00:26 · 1 answers · asked by thezach322 1

Please help me with this problem. I have no idea how to do it!
1+2^2+3^2+4^2+......= (n+1)^2

It is really complex. I am trying to find the answer! Please help!

2007-11-07 11:47:09 · 5 answers · asked by Hello! 3

2007-11-07 11:45:36 · 2 answers · asked by Rachh B 1

2007-11-07 11:41:12 · 5 answers · asked by stephanie m 1

Squareroot 7 over 5th root 7

2007-11-07 11:40:29 · 1 answers · asked by Anonymous

if you could direct me with how to figure out the sine or cosine i'll be on my way to solving for the other trig functions. thanks in advance!

here's the problem.

find sin x and cos x given cos(x/2)= -1/4 and is in quadrant 2

2007-11-07 11:29:11 · 1 answers · asked by Anonymous

2007-11-07 11:28:33 · 1 answers · asked by f_k_l_5031 1

National expenditures for health care (in billions of dollars) have risen dramatically since 1960 when the total was $26.7 billion. According to data from the US dept of HHS, the rate of change of expenditures can be modeled by h'(x)= 0.0126t^2+1.532t-5.08, where t=0 represents 1960. Find the function that models the expenditures for health care using the initial condition given to solve for c.

2007-11-07 11:28:26 · 1 answers · asked by jessiebabie824 2

one vertex of a square and the midpoints of the two sides not containing this vertex are vertices of a triangle. if the area of the square is 16, what is the area of the triangle?

2007-11-07 11:26:05 · 5 answers · asked by kkga_1 1

Does anyone know about Trigonometric Identities? I have 16 I have to do for pre-calc, and no idea how to do it. I get the theory-- replace the parts until the sides match up.... But, I need help.

2007-11-07 11:25:21 · 1 answers · asked by Doesdeathbecomeme? 1