Mathematics - 1 November 2007

let (X, T) be a topological space with A closed subset of X, B a connected subset of X s.t. A intersect B non-empty. if there is non-empty W a subset of B with W interset A non-empty. show B intersect boundary of A.

2007-11-01 14:28:34 · 2 answers · asked by Anonymous

1.What is the sum of the roots of 3x^2-7x+8=0?
a. 3/7 b. -7/3 c. 7/3 d. -3/7
2. What is the remainder when P(x)=x^3-7x+5 is divided by x-1?
a. -1 b. 1 c. 5 d. -5
3. Factor completely: x^3-6x^2+3x+10
4. What is the range of the function y+x^2-3x-10?
5.If P(x) is a polynomial with a positive degree, then P(x) has at least one zero.
a. the number root theorem
b. The fundamental theorem of algebra
c.The remainder theorem
d. the factor theorem
6. It occurs whenever 2 successive terms have opposite signs?
7. what is the formula of the division algorithm?
8. The domain of the quadratic function
a. the set of all real numbers
b. the set of positive and real numbers
c. the set of integers
d. the set of negative real numbers
9. How many turning points does the equation x^8-5x^2-2x+1 have?
10. Transform f(x)= -2x^2-16x+12 into vertex form.

2007-11-01 14:21:27 · 1 answers · asked by jazz 1

2007-11-01 14:19:28 · 12 answers · asked by Holly 1

lcm for 36 and 42

2007-11-01 14:16:09 · 14 answers · asked by Anonymous

f(x)=2 ln [cosx]

what is f''(x)=?

2007-11-01 14:15:34 · 3 answers · asked by Anonymous

http://i111.photobucket.com/albums/n157/wiltzandrew/GOOD7.jpg
All of the important information is already given. The image is drawn perfectly to scale. Here are the questions:

"1) What are the coordinates of the yellow dots?
2) What is the length of the yellow line?
3)What is the area of the polygon?
4) What are the interior angles of the two yellow dots?

*Show your work; numbers must be accurate to the 4th decimal place*"

I made this up in Chemistry two days ago when the teacher was rambling on about saturated and unsaturated solutions. Just to find the distance between the yellow dots, it took me about 2 hours because I forgot a few of my trig rules; did that stuff last year; eesh. Took my math teacher about a half hour to find the distance between the two yellow dots. I felt like spicing it up, and adding a few more questions. IM me if the questions are unclear. Good luck!
-Andrew
wiltzandrew1989 on Yahoo! Messenger,
wiltzandrew on AIM,
wiltzandrew on MyspaceIM

2007-11-01 14:13:11 · 2 answers · asked by College guy 2

and could you please tell me how you go the answer too? I'm still so confused on how to factor =(

2007-11-01 14:12:17 · 3 answers · asked by Christina : 2

And show the work.

Here is the problem:
Charley wants to create a special mix of two coffees. One priced $6.40 per lb, the other at $7.28 per lb. How many pounds of the $7.28 coffee should he mix with 9 lbs of the 6.40 coffee to sell the mixture for $6.95 per pound?

2007-11-01 14:01:20 · 4 answers · asked by -Liz 3

What mulitiplyed by what equals 175???

2007-11-01 13:59:18 · 4 answers · asked by Sarah S 1

I just have 3 problems I don't know how to do...

5. 3/x+2/5,x(equals with a line through it)0

(1) 1/x (2) 2x+15/5x (3) 5/x+5 (4) 2x+15/x+5


9.If 2x+5=-25 and -3m-6=48, what is the product of x and m?
(1) -270 (2) -33 (3) 3 (4)270
** for 9 could you possibly tell me the steps, i tried it and i keep getting it wrong and i think m doing a stupid mistake

14. In a telephone survey of 100 households, 32 householdspurchased brand A cereal and 45 households purchased brand B cereal. If 10 households purchased both items, how many of the households did not purchase either brand A or brand B cereal. Show work.


Thank you very very much! All answers appreciated!!

2007-11-01 13:56:10 · 3 answers · asked by Anonymous

S (e^(1/x) + 2) / x dx

I just need to see how this is worked out, thanks:)

2007-11-01 13:51:14 · 1 answers · asked by george p 2

1) 8x^3+x^2-x+6 divided by x+1

2007-11-01 13:45:12 · 3 answers · asked by Dare to ask? 3

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/303a/Picture2-1.png

2007-11-01 13:37:24 · 9 answers · asked by Anonymous

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/303a/Picture4.png

2007-11-01 13:32:38 · 4 answers · asked by Anonymous

2007-11-01 13:31:43 · 4 answers · asked by Troopa06 1

Just simply this expression

2007-11-01 13:28:04 · 14 answers · asked by tman 1

F(x)=
square root (-x) x<0
3-x 0<(or equal to)x<3
(x-3)^3 x>3

Where is the function continous?
P.S. Its all part of the function. I don't get this. Please help.

2007-11-01 13:27:38 · 1 answers · asked by Anonymous

Problem- Suzie jumps from a 1 meter springboard with an initial upward velocity of 4.9 meters per second.
Questions i answered-
a- write an equation= -4.9t^2+4.9t
b. When will Suzie return to her initial height- 1 second
Questions I need help on-
c. When will she hit the water (water = 0 meters) assuming that you start from the 1 meter springboard.
d.How high above the water does she get?

Thank you.

2007-11-01 13:25:35 · 1 answers · asked by None 1

4√6 x √6
would it be 4√36 = 2√6???

2007-11-01 13:24:46 · 5 answers · asked by NoTrigger 2

Hey, my teacher gave us a extra credit halloween themed worksheet and I desperately need the points but I'm to stupid to figure these out. Any help is awesome. Some work is necessary is but don't worry about showing every little step. Thanks!
--
1. How many pounds of candy selling for $2.25 a pound should be added to two pounds of candy selling for $3.75 a pound to create a blend, which will sell for $2.85 a pound?

2. Alexis bought 14 bags of candy at the store for a total price of $41.52. She bought some bags of candy that cost $3.21 each and the rest cost $2.64 each. How many bags of the $3.21 candy did Alexis buy?

3. Austin, Anthony, and Brittany went trick or treating on halloween,. Altogether, the three of them collected 57 pieces of candy. Anthony collected 4 more than 3 times the number of pieces of candy collected by Austin. Brittany collected 7 less than the number of pieces collected by Austin. How much candy did Austin collect?

2007-11-01 13:17:50 · 7 answers · asked by Cameron S 2

A bag contains 20 marbles. They are of three different colors. There are eight
blue marbles, seven red marbles, and five green marbles. You are asked to close
your eyes and draw marbles out of the bag, making sure you leave at least four
marblesof any one color, and at least three marbles of any second color.What is the maximum number of marbles you should draw?

2007-11-01 13:17:07 · 17 answers · asked by J 3

Captain Hook loved number puzzles. He left one such puzzle on Algebra Island,where he buried his magic treasure. The puzzle read:
Get ye to the palm tree at the middle of the isle. Face ye to the west. Think ye of the
number that is seventeen more than the quotient when six times the number of paces to
the treasure is divided by two. This number be equal to the sum when twelve more thannine minus fifteen is added to four times the number of paces to the treasure. Dig ye
only once, for if ye dig in the wrong spot, the treasure will disappear.How many paces should you take?

2007-11-01 13:14:07 · 3 answers · asked by J 3

I'm a bit confused on how to use the indirect proof.
The problem is: "=" : BIconditional and

~(p≡q) conditional [(p conditional q) conditional ~ (q conditional )]

THANKS

2007-11-01 13:13:58 · 1 answers · asked by Anonymous

The circumference of a sphere was measured to be cm with a possible error of cm. Use differentials to estimate the maximum error in the calculated surface area.

Estimate the relative error in the calculated surface area.

Hint: The circumference of a sphere of radius r is , and its surface area is . Eliminate first!

2007-11-01 13:13:20 · 1 answers · asked by samantha 5

Please could you help me with this? and show me how you got th answers too,?
I do know that you have to plug in the variable for the value for one (x or y ).
Use elimination to solve each system of equations.

5.) 3x-4y=6
2x+3y=3

6.) 3x-5y=1
2x+3y= -12
use substitution or elimination to solve these system of equations-

7.) x+y=13
2x-3y=1

8.) 9x+2y=5
3x-y= -10

9.) 2x+y=1
x=5+y

10.) x= -8y
2x-3y=1

11.) 2x+4y=12
-3x+3y=63

12.) 5x-2y= -1
3x-y= -2

13.) Bill leaves his house for Ashley's house riding his bicycle at 8 miles per hour. At the same time, Ashley leaves her house heading toward Bill's house at 3 miles per hour.

a.) write a system of equations to represent the distance, d, each is from Ashley's house in h hours. They live 8.25 miles apart.

b.) Solve the system to determine how long they travel before meeting.

2007-11-01 13:13:18 · 2 answers · asked by Madeline the Bard 3

At the end of 1994, Frodo was half as old as his grandfather. The sum of the years they were born is 3838. How old will Frodo be at the end of 2007?

2007-11-01 13:12:34 · 6 answers · asked by J 3

how would i solve this system?
with either elimination or substitution.

2r + 3t = -10
-1r - 2t = 12

2007-11-01 13:12:22 · 2 answers · asked by Anonymous

I don't understand how to do this. Thank you!

2007-11-01 13:09:29 · 3 answers · asked by Paulllll C 3

Take the function f(x) = 9 x + 3 x^−1

Local minimum at x equals ___ with value___
Local maximum at x equals ___ with value ___

2007-11-01 13:05:18 · 3 answers · asked by Rachel 1

x-> infinity and g(x) = (sqrt(x^2 + ax)) - (sqrt(x^2 +bx)) ???
explanation please the answer is (a-b)/2

2007-11-01 13:02:58 · 2 answers · asked by Moi 2