Mathematics - 7 August 2007

2007-08-07 11:29:45 · 3 answers · asked by Anonymous

2007-08-07 11:27:38 · 6 answers · asked by Anonymous

Right, isosceles, scalene, or equilateral?

2007-08-07 11:21:30 · 2 answers · asked by internets 1

In a metric space S, with distance function, d, the distance between 2 subsets A and B is defined as d(A, B) = infimum {d(a,b) | a in A and b is B}. Suppose A and B are disjoint. Show that, if A is compact and B is closed, then d(A,B) > 0. Show that this does not follow if, instead of compact, A is only closed

Thank you

2007-08-07 11:05:31 · 1 answers · asked by Anonymous

I am tearing my hair out here trying to figure these problems out. I would really appreciate it if someone could show me the steps they took to figure these out. Thanks much.

1) Find all solutions of tanX - cotX = 0, where is X is measured in degrees and 0
2) Find all solutions of cscX = -3, where X is measured in degrees and 0
3) Find all exact solutions of 2cos^2x-sinx = 1 in the interval 0

I know there's a couple of 'em, but I'm hoping with some explanation I can use these three as a basis for understanding how to more. Please help me with this. Thank you very much!

2007-08-07 10:54:46 · 2 answers · asked by cac_424 1

Let f:R--> R be continuous, periodic and non constant, with fundamental period p. Show that, if p is irrational, then the sequence (f(n), n=1,2,3.....) is dense in f([0, p]). I was told to use the pigeon hole principle, but I'm really confused.
Thank you

2007-08-07 10:44:14 · 4 answers · asked by Anonymous

Help please!!!

2007-08-07 10:42:19 · 2 answers · asked by Anonymous

39
------ Example
5

2007-08-07 10:41:42 · 5 answers · asked by Anonymous

x - x+2/ 4 over 3/4-5/2p


3/x + 3/y over 3/x -3/y



2/s - 3/t over 4t^2 - 9s^2 / st

2007-08-07 10:20:11 · 3 answers · asked by Anonymous

2007-08-07 10:12:03 · 5 answers · asked by Jessica W 1

I've managed other problems like this, but this one has me completely stumped.

Solve the following equations. Find the appropriate values for p and q.

3p - 2q = 37
p + 4q = 3

the values of p and q are the same for each equation, but I can't make it fit.

2007-08-07 10:11:13 · 7 answers · asked by thexelitistxhero 2

What is your favorite math formula? Mine is

e^(i*pi)+1=0

2007-08-07 10:10:47 · 8 answers · asked by Amy W 6

(-8)(9)=
5(-6)=
(-14)2=
(-2)4=
(9)(-4)=
(-7)(7)=
(-7)(-10)=
9(-8)=
(-3)(8)=
(5)(-5)=
6(-2)=
11(-2)=
56/(-8)=
(45)/(-5)=
(-14)/2=
(-21)/3=
-49/-7=
40/(-8)=
(-32)/8=
60/(-5)=
72/(-8)=

2007-08-07 09:43:32 · 7 answers · asked by ♥OFFICIALLYMrs-JONES♥ 2

This is probably elementary, but… If I need to find the value of X after 2 external variables increase it by 29% and 50% respectively. Is the formula simply X(1.29)(1.5)=Y?

2007-08-07 09:36:53 · 3 answers · asked by Noah D 1

Help me with this factorial, please?

Simplify the following expressions in the terms of factorials and powers of two: 2x4x6x....x2008, 1x3x5x....2007.

Could you please show me how you got the answer by work?
Thanks. <3

2007-08-07 09:30:06 · 3 answers · asked by eirhya 1

Help me with a probability question, please?
And if possible.. explain how it works?
Thank you..

Seven boys and three girls are on a soccer team. The A team is to have 5 members. How man possible A teams can I pick? Say the A team must have at least two girls. How many A teams can I pick now?

2007-08-07 09:14:16 · 5 answers · asked by eirhya 1

this is the question exactly the way it is printed in the book

for a given month, a 300- acre lake has 15 cfs of inflow, 13 cfs of outflow, and a total storage increase of 16 ac-ft. a USGS guage next to the lake recorded a total of 1.3 in of precipitation for the lake for the month. assuming that infiltration loss is insignificant for the lake, determine the evaporation loss, in inches, over the lake for the month.
SOLUTION- solving the water balance for inflow I and outflow O in a lake gives, for evaporation
E = I - O + P - change in S
E= evaporation
I= inflow
O= outflow
P= precipitation
change in S= change in storage

so can anyone help me solve the problem, and/or tell me the best way to set up and work problems similar to this

2007-08-07 09:03:59 · 2 answers · asked by crlhthsn 1

(r+6)^2=10

solve the equation by removing the square roots

thanks

2007-08-07 08:44:13 · 8 answers · asked by jobroluvr=)<3 1

please help me.

2007-08-07 08:41:56 · 11 answers · asked by nighthawkfez 1

The shuttle travels at 836 mi/h, and the satellite at 682 mi.h, in the same direction. How long will it take the shuttle to overtake the satellite, and in what distance?

Any help is greatly appreciated, thank you.

2007-08-07 08:26:06 · 4 answers · asked by Anonymous

If 9 is added to the original number, the new number will have the original digits reversed. Find the number. (Hint: let x = the tens digit and y = the ones digit, so that the value of the number is 10x + y).

Any help is greatly appreciated. Thanks.

2007-08-07 08:08:28 · 8 answers · asked by Anonymous

Okay my question is mathematical and I want to compare my calculations to someone else's.I'm doing it just for fun although I'm not that good at it.
Here's the situation:
In roulett there is an option of putting on different sections and each section contains 12 numbers. There are 3 sections plus the number zero which is not in any section. All together there are 37 numbers. If I put on 2 out of 3 sections each time I have a 65% chance winning, and since the payout is 3 times I loose one unit of money and win 2 units, alltogether if I hit a number i win one unit. On the other hand if the number is not in my sections I loose 2 units of money. So if I win 13 times out of 20 putting up the same amounts each time, then I end up loosing one unit.
My questions are:
What is the probability of me winning 13 times out of 20?
What is the probability of winning more than 13 times out of 20?
Does it change the probabilities if I keep changing sections or if I use the same 2 sections all the time?

2007-08-07 08:07:18 · 4 answers · asked by amateurgrower 3

Prove that the answer of this equation is only x=y=z=2

3^x+4^y=5^z

2007-08-07 08:04:11 · 4 answers · asked by Amir 1

Does that mean

2007-08-07 07:57:07 · 10 answers · asked by Anonymous

....is C the midpoint of AB?

2007-08-07 07:52:35 · 9 answers · asked by Anonymous

2007-08-07 07:47:50 · 10 answers · asked by fmontes92 2

I'm confused about a certain step in a problem at this site:

http://purplemath.com/modules/distform.htm#to_quiz

If you follow the link, it's the very last example. How are they getting y^2? I don't understand.

2007-08-07 07:45:04 · 4 answers · asked by justgoingforadeathdrive 1

I have two questions i need help with

1.x2 + 2x - 15 = 0

a. Solve by factoring.
b. Solve using the quadratic formula.

2.x2 + 4x - 21 = 0

a. Solve by factoring.
b. Solve using the quadratic formula.

2007-08-07 07:40:14 · 10 answers · asked by Anonymous

In order to pass a physical education class at a university, a student must run 1 mile in 12minutes. After running for 10 min, she still has 500 yd to go. If her maximum acceleration is 0.15m/s^2 can she make it? If the answer is no, determine what acceleration she would have to have to be successful.

2007-08-07 07:35:01 · 3 answers · asked by vivianvo333 1

The complement of an angle is 37 degrees. What is the measure of the angle?

2007-08-07 07:34:41 · 7 answers · asked by taylor17brown 1