Mathematics - 19 August 2007

x = -x
x/-x = -x/-x
-1 = 1

Obviously this isn't true. What's gone wrong?

2007-08-19 23:08:19 · 15 answers · asked by amer174797 1

1. Calculate the integral (dydx) where y = 2 , y = 4-2x and x= 0 , x = 1

2. Calculate the integral (4-2u /v^2)dvdu where v = -2 , v = 4-2u and u= 0 , u = 3

2007-08-19 22:47:58 · 3 answers · asked by nizam_cl 1

1)with the parametric equations find the general equation of the plane.
2)explain why this plane is not parallel to a plane having a normal vector n = (5,-2,-1)

2007-08-19 22:16:49 · 2 answers · asked by chuku 1

Every positive integer greater than 1 is equal to a ''product'' of prime numbers.
i.e. 12 = 2.2.3, 35 = 5.7, 30 = 2.3.5 etc...all holds true, but it doesn't make sense if the number chosen is p, a prime unless the number of primes in a ''product'' is allowed to be 1; i.e. 13 = 13 ?, p = p ? but this implies that ''a prime number is a product of one prime''; If so isn't that contrary to the definition of PRODUCT ?
P.S. a product is the result obtained from one or more binary ops. as i remembered. i.e. must exist more than one elements; in this case at least two natural numbers.

2007-08-19 21:35:28 · 11 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 center is on the y-axis.

2007-08-19 20:52:03 · 6 answers · asked by trevor 1

A bullet is fired into the air with an initial upward velocity of 80 ft. per second from the top of building 96 feet high.The equation that gives the height of the bullet at time t is h=96 + 80t - 16t^2.At what time the bullet be 192 ft in the air?

2007-08-19 20:30:40 · 4 answers · asked by kamote 1

All i remember is that you have to draw a triangle...totally forgot all my trig over the summer. Any help would be great!

2007-08-19 19:47:41 · 4 answers · asked by Anonymous

(4w-28) + (11w +13)=180

How do I solve this??

2007-08-19 19:42:00 · 14 answers · asked by Southerngrl 2

The polar coordinates of P are (-5, pi/2). What are the rectangular coordinates?
a) (0,5)
b) (5,0)
c) (2,2)
d) (0, -5)
e) (-5,0)
PLEASE SHOW ME ALL the work! thank thank you !!

2007-08-19 18:54:52 · 4 answers · asked by Anonymous

1) find the zeros of f.
2) write an equation of the line normal to the graph of f at x=0
3) find the x - and y-coordinates of all points on the graph of f where the line tangent to the graph is parallel to the X-axis.

Please help

2007-08-19 17:35:27 · 2 answers · asked by DeadOn 1

the answer is not 0.

2007-08-19 17:15:59 · 27 answers · asked by ZAINIQ 1

An architect has designed a motel pool within a rectangluar area that is fenced on three sides. If she uses 60 yards of fencing to enclose an area of 352 square yards, then what are the dimensions (L) and (W)? Assume (L) is greater than (W).

2007-08-19 16:58:05 · 4 answers · asked by Anonymous

Winston can mow his dads lawn in 1 hour less than it takes his brother Will. If they take 2 hours to mow it when working together then how long would it take Winston working alone?

2007-08-19 16:53:11 · 3 answers · asked by Anonymous

The function f is linear and satisfies f(d+1)-f(d)=3 for all real numbers d. What is f(3)-f(5)?

2007-08-19 16:47:21 · 7 answers · asked by bob 2

solve the rational inequality. state the solution set

2007-08-19 16:40:51 · 1 answers · asked by mustang_muscle06 1

An artist wants her painting to be in the shape of a golden rectangle. If the lenght of the painting is 36 inches, then what should be the width?

2007-08-19 16:38:48 · 1 answers · asked by mustang_muscle06 1

and also where can i find website with similar problems with that and please show solution thank you

2007-08-19 16:37:13 · 4 answers · asked by Camille D 1

2007-08-19 16:23:25 · 6 answers · asked by ADS 2

2007-08-19 16:18:45 · 5 answers · asked by whatthehec 2

2007-08-19 16:14:13 · 2 answers · asked by ADS 2

Does anyone have anythoughts on how to prove or disprove this? Tryin to get some practice in before school starts.

Let {ai } be a sequence of real numbers. If this sequence converges, then it converges
to a unique limit.

Thanks

2007-08-19 16:10:45 · 6 answers · asked by mobaxus 2

I'm really rusty on my basic math skills how would I graph the following equation? Thank you in advance for all your help!

y = 7 - 6x - x^2

2007-08-19 16:10:13 · 2 answers · asked by Hola Lola! 2

find all real or imaginary soulutions to this equation. use the method of your choice.

2007-08-19 15:36:21 · 5 answers · asked by Anonymous

find all real or imaginary soulutions to this equation. use the method of your choice.

2007-08-19 15:33:28 · 6 answers · asked by Anonymous

a. 16inches
b. 26.6 centimeters
c. 1.1 feet
d. 0.4 meters
How would you show work on these.

I think its A, B, D then C.
Cause the smallest measure is inches then cm then meters then feet.
Am I right?
If not then show me.

2007-08-19 15:31:24 · 7 answers · asked by valerie h 2

I need to obtain a single fraction, here is the expression:

(2x / x^2 - 6x +9) - (1 / x + 1) - (8 / 2^(2) - 2x -3)

I dont need the answer, but how to start this problem. Thank You.

2007-08-19 15:07:56 · 3 answers · asked by Dan 3

Find the percent of the total area under a normal curve that is contained within the specified interval. Between the mean and 2.41 standard deviations from the mean.

I am having trouble doing the configuration for this. I do not understand how to do the computing on the calculator.

Any help would be appreciated.

2007-08-19 15:06:17 · 1 answers · asked by Anonymous

1. 3x + 4y = 8 and x + y = 5


2. x - y + 1 = 0 and y - x^2 = 7

2007-08-19 14:54:14 · 3 answers · asked by Anonymous

-2x - 47 = 7(x+1)

Simplify

2007-08-19 14:48:40 · 7 answers · asked by Meagan C 1

solve the following equation for y

y/5 - 9 = 22

2007-08-19 14:47:42 · 5 answers · asked by Meagan C 1