Mathematics - 2 June 2007

Let' s take x = 0.99999999...
Then 10x = 9.99999999...
10x -1x = 9.99999999... - 0.99999999...
Therefore 9x = 9
Then x = 1.

But How can 0.99999999... be equal to 1? Though it always approaches 1 it never IS 1. How can you explain This Please?

P.S: Please Don't say rounding off to 1. I am asking about accurate mathematics not rounding-off.

2007-06-02 22:06:58 · 17 answers · asked by Nivvedan 2

Write an equation in slope-intercept form for the line (-1,10) and (5,8).

A. y = 1/3x + 29/3
B. y = -1/3x + 29/3
C. y = 1/3x - 29/3
D. y = -1/3x - 29/3

please help, and this is only for extra credit, please explain so i can study your answer

thanks=)

2007-06-02 21:21:37 · 6 answers · asked by Anonymous

Verify that the hypotheses of the Mean Value Theorem are satisfied on the given interval and find all values of ‘c’ that satisfy the conclusion of the theorem.

f(x)= X2 + x ; [ - 4, 6 ]

in this equation x have power 2. and then + to x
thanks

2007-06-02 20:54:24 · 3 answers · asked by zubair y 1

yard, how long will it tae them to mow it toghether? (The answer is 120/7 mins but HOW did they get that answer?

2007-06-02 20:47:04 · 5 answers · asked by cookies_rule_91 3

y=x^2+3x+1/x

2007-06-02 19:45:33 · 3 answers · asked by Anonymous

f(t)=1/t^2-1/t+t

2007-06-02 19:43:16 · 4 answers · asked by Anonymous

2007-06-02 19:31:47 · 10 answers · asked by Adil 3

How do you round 1946.3745 to the hundreth place?

2007-06-02 19:30:36 · 6 answers · asked by lilnessaslove 1

The price of a stock rose $0.09 on Monday and rose again $0.12 on Tuesday. If the closing price on Tuesday was $1.47, what was the opening price on Monday?

2007-06-02 19:28:27 · 5 answers · asked by lilnessaslove 1

How do you write 896,047 in standard decimal form?

2007-06-02 19:27:32 · 3 answers · asked by lilnessaslove 1

x^2+2x+5=0
I know to us the quadratic equation

-2+-sqrt-16
--------------
2

what do i do with the negative sqrt to finish solving

2007-06-02 19:24:15 · 4 answers · asked by ksstormhunter 1

evaluate the determinant ----


| 1 cos(B-A) cos(C-A) |
| cos(A-B) 1 cos(A-C) |
| cos(A-C) cos(B-C) 1 |

order - 3 x 3

for further undestanding ---
elements of R1 are --- 1 , cos(B-A) , cos(C-A)
elements of R2 are --- cos(A-B) , 1 , cos(A-C)
elements of R3 are --- cos(A-C) , cos(B-C) , 1


pls. solve it sooon .... thnx

2007-06-02 19:06:57 · 2 answers · asked by slimy dude 2

............/~~\.........
.........../~~~\........
...40>/~~~~\<40
........./__x__\......
......../~~~~~~\.....
60>/~~~~~~~\<60
...../~~~~~~~~\...
..../~~~~~~~~~\..
______ Y_____
Isosolese triangle
60m is how long the side is
40m is how long the side is
therefore one side equals 100 metres
i need to know what size is x and y.

the only thing that was given to me was x+y=80, which obviously means the x side and the y side both add to equal 80

answer:

since both triangles are proportional, we can say that :
40/x = 100/y
40y = 100x
and since x + y =80,
y= 80 - x
then,
40 (80 -x ) = 100 x
3200 - 40x = 100 x
3200 = 140 x
x = 22.857

substitute, x to the first equation,
40/22.857 = 100/y
1.75 = 100/y
y = 57.143



if someone asks me how did i get the answer and why did i end up with that answer, how do i explain it?????????

2007-06-02 18:31:15 · 2 answers · asked by Anonymous

I have 100 gm water .

Now i add 10 gm salt into it

should i call it 100+10 =110 gm solution ?

or should i call it 100 gm solution ?

2007-06-02 18:25:42 · 2 answers · asked by Anonymous

I don`t know how to do this

2007-06-02 18:13:47 · 5 answers · asked by babycakesconner 2

I am trying to see if there's any easier way o find out the point where the curvature is maximized for y=e^x
i used the formula k= IVxAI/(speed)^3 and then tried differentiate the result. What i had after differentiation was something so weird. i could had no idea where the derivative equals to 0. do u have any easier way to find out where the maximum is

2007-06-02 17:59:25 · 1 answers · asked by Anonymous

-5x^2 +15x +18

how so i solve this using the quadratic equation or by factoring? after wards i need to graph it.

2007-06-02 17:57:56 · 5 answers · asked by elseresle 2

i know its c2= a2+b2 - 2 ab cos(c)

but how can i actually use it in an example?

2007-06-02 17:55:51 · 6 answers · asked by Edmund K 2

10^(4) *t *e^(-0.2t) + 100

2007-06-02 17:46:19 · 3 answers · asked by Anonymous

Simplify these complex fractions:
I don't exprect everyone to do all of them, just help with as much as you can...I need all the help I could get!

11. 1/v+2 all over 2/v+7/2v

12. 4a-11/3+5a/6 all over a-2a/4

13. 3/r+2/rs all over 4s/s+6sr/r

14. 12a^3b^/c^6 all over 6b^2a^2/c^9

15. 3c^3b^2/d^5 all over b^5c^3/3d^5

2007-06-02 17:45:21 · 4 answers · asked by ~♥♥♥~ 3

Give 99% confidence limits for a sample of size 300, whose mean is 50, if the sample was taken from a population with standard deviation equal to 4.

2007-06-02 17:45:09 · 1 answers · asked by Anonymous

2007-06-02 17:25:23 · 11 answers · asked by REDD 1

2007-06-02 17:13:51 · 4 answers · asked by REDD 1

x + 4xy + 2
y + 4x2y2 + xy
y2+ 4xy + 2xy
y + 4xy + 2

2007-06-02 17:04:44 · 4 answers · asked by Anonymous

Factorize:

1) 7ac+14a
2) 12ax^3+18xa^3

Solve

1) (x^27/27)^2/3
2) (x^-2/4)^-1/2

THANKs

2007-06-02 16:59:15 · 8 answers · asked by Anonymous

2007-06-02 16:56:22 · 7 answers · asked by REDD 1

2007-06-02 16:54:22 · 9 answers · asked by REDD 1

Is this right?
3 4/5~2 4/5=3 4/5*2 5/4= 5*3+4~4*2+5=19*13= 247

2007-06-02 16:52:09 · 6 answers · asked by babycakesconner 2

2007-06-02 15:48:02 · 6 answers · asked by Anonymous

If theta is an acute angle adn sin theta = 2/ square root of 7, use the identity sin squared theta + cos squared theta =1 to find cos.

2007-06-02 15:24:24 · 3 answers · asked by Nou Nou 1