Mathematics - 17 August 2007

2007-08-17 23:33:18 · 4 answers · asked by what is 60ft in meters? 1

with respective probabilities of .4, .3, .2, and .05. In addition, there is a 3 percent chance of breaking even and a small chance of losing $10,000. Find the expected profit.

2007-08-17 23:25:34 · 2 answers · asked by Anonymous

2007-08-17 22:56:01 · 5 answers · asked by LG 1

40 blue, 40 red, 20 green. 60 of these are large. What's the probability of choosing 3 large, blue, without replacement?

I can do this if there aren't large and small. If they are all the same size, the answer is 6.1% chance for 3 blue.

How do you factor in the 60 large?

Thanks!

2007-08-17 22:51:11 · 1 answers · asked by powhound 7

I know that:

(a-b)(a-b)=a^2-2ab+b^2

For example, by substituting a=3 and b=1:


(3-1)(3-1)=4

or

3^2-2*3*1+1^2=9-6+1=4

I know they are equal but...

What I want to ask is that in the first place, how do people know we need to use the 3 in the first bracket to multiply the 3 in the second bracket and then use the 3 in the first bracket again to multiply the -1 in the second bracket and so on.

Thank you.

2007-08-17 22:39:46 · 7 answers · asked by I need answers 1

What is the exact Quadratic Formula? I really need to have the exact answer...I need to have my perfect answer...in my ASSIGNMENT........

2007-08-17 22:14:33 · 7 answers · asked by Anonymous

2007-08-17 21:03:35 · 7 answers · asked by JohnnyD 1

and can u calculate the tax of 249.99

thx

2007-08-17 20:35:07 · 5 answers · asked by Anonymous

A boat travels 30 km upstream and in the same time it travels 50 km downstream. The speed of the stream is 5 km/hr. What is the speed of the boat in still water? What is the distance between the 2 ports?

2007-08-17 20:11:41 · 4 answers · asked by Titanic lover 2

How do u rearange

4x^3+5x+3=0

to give a value for x

2007-08-17 20:04:55 · 4 answers · asked by Anonymous

We include the constant to figure out the derivative in y=6x^2, but we ignore the constant in y=2sin(x). Is it because the constant is not really part of "x" in the second equation?

2007-08-17 19:53:12 · 5 answers · asked by Muffins 1

if it do not have,then does air do not exist inside it?do air not have any volume?if yes,why so?

2007-08-17 19:52:39 · 7 answers · asked by san g 2

please help me

2007-08-17 19:41:14 · 2 answers · asked by Anonymous

. A vertical pole casts a shadow that is 12 ft. At the same time a yardstick casts a shadow that is 4 ft. How tall is the pole?

2007-08-17 19:27:03 · 7 answers · asked by bap 53 1

Steve starts out on his moped at the rate of 40 miles per hour. Two hours later, Bill drives along the same route at 55 miles per hour. In how many hours will Bill overtake Steve?

Is there paticular equation for this?

Thanks!

2007-08-17 18:24:32 · 10 answers · asked by phattylovesphood. 2

2007-08-17 17:57:17 · 4 answers · asked by xyz 2

2007-08-17 17:53:22 · 10 answers · asked by Brije B 1

A spherical balloon is expanding and its volume is increasing at the rate 288cm^3/s when the side is 6cm. Find the rate at which the:

a) side is increasing when the side is 6cm.

b) surface area is increasing when the side is 6cm.

v= 4/3 pie*r^3 A=4pie*r^2

2007-08-17 17:47:21 · 3 answers · asked by Anonymous

"Find the equation of the circle if the circle is tangent to the line x+2y=3 at the point (-1,2) and the circle is on the y-axis."

Another analytic geometry homework..I don't know what equation will use....

2007-08-17 17:39:33 · 2 answers · asked by trevor 1

Use the rules of differentiation to find the derivatives of the following function. Simplify terms wherever possible, but it is not necessary to factorise and then cancel any of the expressions.

2007-08-17 17:14:04 · 3 answers · asked by vanisha j 1

x^2 + y^2= 4

x^2 + y =4

2x + 3y= 4

y^2=x^2 - 1

im not really sure how 2 do these i know that for every input of x that y can only have 1 output but im still not sure.. plz help

2007-08-17 17:10:49 · 6 answers · asked by Anonymous

The front wheels of a tractor are 0.5 m in diameter and the rear wheels are 2 m in diameter.

whats the distance travelled by the tractor when the front wheel has revolved 2100 times more than the rear wheels ?

(1)8.8 km
(2)2.2 km
(3)5.28 km
(4)4.4 km


KINDLY ,PLEASE dont give soln, i want to solve myself, i want to take the challenge ....if i cant solve it , i will post it again ....but for the time being i need hints .

what i dont understand is , whats the relationship between front wheel and rear wheel ? i think the tractor will move the same distance .......whether the front wheel is bigger or smaller than the rear wheel ...it does not matter .

BY the way , as per the question , it asks how much distance tractor will move given a front wheel and real wheel revolution difference .

can you give me some HINTS so that i can use that in my head and proceed to solve ?

thank you

2007-08-17 17:09:13 · 4 answers · asked by calculus 1

2x - 3y = 12

2007-08-17 16:27:20 · 8 answers · asked by ray 1

answer and explain how you got the answer please

2007-08-17 16:12:00 · 7 answers · asked by olive 3

Trevor's trailer has 3 tyres, two in use and one spare tyre. The three tyres are worn 25000km, 28000km, and 31000km. Find the distance that Trevor's trailer traveled in thousand kilometres.

2007-08-17 15:00:46 · 8 answers · asked by Anonymous

1, 2/9, -8, -17/7, 1/76, -7, 25/6

2007-08-17 13:57:37 · 4 answers · asked by Anonymous

2007-08-17 13:44:23 · 11 answers · asked by robin hood 3

i'm 5'11 and where size 12 shoe

2007-08-17 13:24:10 · 10 answers · asked by soncal 1

1.irrational numbers can become rational by dropping a few decimal places
a.true
b.false

2.triangular numbers are created by adding consecutive counting number
a.true
b.false

3.integers are not natural numbers
a.true
b.false

4.change equations,x-y=4 to form y=mx+b
a.x-4=y
b.-y=4+x
c.y=x-4
d.y=x+4

5.express statement as an equality and state whether the solution is open or closed. carpeting the room could cost as much as $1000.

a.c<$1000;open
b.c>$1000;closed
c.c<$1000;open (the less sign should have an underline under it)
d.c>$1000;open (the greater sign should have an underline under it)

6.parallel lines when crossed b transversal create
a. congruent angles
b.acute angles
c.alternative angles
d.right angles


7.a school sent 5 students to the spelling bee. the team was made of 4 people.how many combinations could u make up?

a.80
b.30
c.120
d.60

2007-08-17 13:03:34 · 5 answers · asked by KenM 2

Explain this to me......infinity+1 means that the infinity that you used in the equation wasnt really infinity because you could still have one to add. Explain this to me please.

2007-08-17 13:01:49 · 10 answers · asked by schlynn2000 1