Mathematics - 26 June 2007

two step equations

2007-06-26 23:10:34 · 16 answers · asked by Anonymous

How on earth did Betrand Russel prove that 1+1=2 and wat was its significance??

2007-06-26 22:55:37 · 5 answers · asked by Butool H 1

Iron and copper are melted in a furnace of a die casting machine in the ratio of 9:11. What is the weight of the melted mixture, if 28.8 kg of iron has been consumed in it?
Option: (1) 64 kg, (2) 35.5 kg, (3) 32 kg, (4) 36 kg

2007-06-26 22:40:43 · 10 answers · asked by mridul m 1

Into how many regions do 500 lines in a plane all passing through the same point divide that plane?

2007-06-26 22:29:39 · 8 answers · asked by Anonymous

A cassette recorder having a tag price of Rs. 900 is sold for Rs 648 after two successive discounts. If the first discount was 10%, what was the second discount?
Options: (1) 8%, (2) 20%, (3) 12%, (4) 13%

2007-06-26 22:25:50 · 10 answers · asked by mridul m 1

i tried solving this with logarithms but i think i dont know enough of the properties of logarithms to do this properly

2007-06-26 21:57:47 · 8 answers · asked by Anonymous

bag A contains 3 red balls,and 2 green balls...bag B contains 2 red balls and 3 green balls.2 are withdrawn from bag A to bag B.Then 2 balls are taken out from B to be put in bag A.What is probablity that bag A now contains 3 red bals and 2 green balls.?

2007-06-26 21:55:06 · 4 answers · asked by Anonymous

Ramon has a horse and a carabao.The horse is 2/3 as old as the carabao.The difference between thier ages is 4 years.How old is the carabao?

2007-06-26 21:44:26 · 8 answers · asked by jonathanaljomargonzales 1

Given : 10 centimeters radius Pi=3.1416.Find the circumference-

2007-06-26 21:41:52 · 4 answers · asked by jonathanaljomargonzales 1

logx + log(x-4) = log5

solve for x

i've started the problem but got stuck

log (x(x-5)) = log 5
log (x^2 - 5x) = log 5
(x^2 - 5x) = 5

2007-06-26 21:38:47 · 6 answers · asked by Anonymous

if the chances of getting a stranger you like, to like you, is but 0.00001, you just have to know 100,000 people to make this dream come true.
true?

2007-06-26 21:21:22 · 7 answers · asked by Anonymous

A conservation society introduced a herd of buffalo into a game preserve. The growth of the herd was modeled by the logistics curve:

P(t) = (450) / (1+8e^(-0.489t))

(a)According to the model, how many animals were introduced initially?

(b)According to the model, what is the limit to the size of the herd?

2007-06-26 20:26:07 · 4 answers · asked by Anonymous

find the distance between the points (a,b) and (b,a)

i basically used the distance formula/pythagorean theorem and i got:

sqrt( 2a^2 - 4ab + 2b^2) <----- is this the answer or is it

(+or-) sqrt( 2a^2 - 4ab + 2b^2)

2007-06-26 19:56:44 · 9 answers · asked by Anonymous

female goldfish became 20%.
a) How many male goldfish were there ?
b) How many female goldfish died ?

2007-06-26 19:54:48 · 8 answers · asked by Lim S 3

This is some circle problem that i have no clue how to do:

If line PQ is both a diameter of circle A and a radius of circle B, what is the value of the fraction:

Area of circle A / Area of circle B ?

Please give me an explanation as well if you could. Explanation may give you best answer. Thank you =)

2007-06-26 19:45:09 · 7 answers · asked by Anonymous

what is g(f(x)) if:

f(x)=3x-5
g(x)=13

is it no solution?

2007-06-26 19:37:17 · 6 answers · asked by Anonymous

Say you have a point, such as (x,y,z) and a line with the equation x=4-2t, y=6+10t, and z=6+2t. How would you find the equation for the plane that passes through the point, and is perpendicular to the line?

2007-06-26 19:36:47 · 2 answers · asked by sam b 5

2007-06-26 19:32:45 · 3 answers · asked by sri d 1

Suppose that you are organizing housing accommodations for a group of four hundred university students. Space is limited and only one hundred of the students will receive places in the dormitory. To complicate matters, the Dean has provided you with a list of pairs of incompatible students, and requested that no pair from this list appear in your final choice.

2007-06-26 19:26:00 · 5 answers · asked by Nik 2

I need to find the limit at x approaches 2 from the right of (x + 2)/(x - 2). My first thought was positive infinite, since the denominator will get very very small but stay positive, making the quotient grow without bound. Not sure of myself however.

2007-06-26 19:15:01 · 3 answers · asked by Nicholas T 2

2007-06-26 19:13:55 · 3 answers · asked by a100 1

The average of 3 prime numbers between 50 and 75 is 191/1.Find the difference between the largest and the smallest prime numbers.
Options : (1) No unique value, (2) 12, (3) 17, (4) 19

2007-06-26 19:00:16 · 6 answers · asked by Anonymous

u x v = 0 if and only if u and v are scalar multiples of each other.

steps please

2007-06-26 18:57:52 · 1 answers · asked by fcb10121 1

how many ml. are there in a shot &1/4? I don't understand liters etc. I am trying to use this program and cost out cocktails so I know what it costs me and what to charge. However like I said I don't know how to convert to ml. a shot & 1/4. Help would be so appreciated since I am now at a stand still! Thanks to that math wizard out there.....

2007-06-26 17:15:53 · 1 answers · asked by Ruth M 2

If h is the height of the balloon, and x is the distance along the ground from A to the point directly under the balloon, then the two equarions are
how could I arrive to the answer below? I have tried but it wouldn't work. please explain your way thoroughly. thanks
As a balloon passes between two points A and B, 2 miles apart, the angles of elevation of the balloon at these points are 27° 19' and 41° 45', respectively. Find the altitude of the balloon. Take A and B at the same level.

tan 27°19' = h/x, and
tan 41°45' = h/(2 – x)

You can solve this pair of equations for x and h.
Height = .654 miles = 3455 feet.

2007-06-26 16:57:13 · 1 answers · asked by liangjizong22 1

If a hotel has an infinite number of rooms, but two are removed, does that make it less than infinite? What if two are added? I think it's still infinite but I don't get it. Suppose infinity is x. Then prove that x+2 =x-2. It's not possible. What is wrong with mathemeticians.

2007-06-26 16:48:43 · 12 answers · asked by helpme123 1

1800, 1850, 1852, 1900, 2000, 2040, 3000, 4000

2007-06-26 16:48:39 · 6 answers · asked by reshuorange 1

The question basically asks to prove that the space of square integrable functions on the interval (-pi,pi) can be expressed as an orthogonal direct sum of odd and even functions. (I.e. given any function f belonging to the space, the function may be written as f(x) = k(x) + m(x), where k(x) is even and m(x) is odd, and where k(x) is orthogonal to m(x). )

My approach so far: I attempted to prove the orthogonality of k(x) and m(x) by expressing k(x) = (f(x) + f(-x)) /2 and m(x) = (f(x) - f(-x))/2 and taking their dot product (i.e. taking the integral of k(x)*m(x) over the interval of negative infinity to infinity). This approach did not seem to work as I ended up with the integral taken from -infinity to infinity of (f(x))^2 - (f(-x))^2, which I am not sure how to show is equal to zero.

2007-06-26 16:39:38 · 2 answers · asked by Anonymous

if any1 has this answer i will see to it that you get extra points heres the riddle so riddle me this

there is a farmer that owns an orchard he has 5 rows of trees with 4 trees in each row the farmer owns 10 trees how is this possible

hints
-it is possible
-drawing it out should help
-think outside the box

P.S. i dont even know the answer and im about to take the sats im shooting for a 720/800 score and my math teacher says if i am to get that score then i should know this so please help

2007-06-26 16:37:13 · 12 answers · asked by clay_vision 3

I'm taking pre-calculus in the summer, and this one just stumped me. I know it's easier than I think it is, but it's just not coming! Any help?

2007-06-26 16:35:50 · 6 answers · asked by Anonymous