Mathematics - 26 July 2006

5x+10-6x+3= 6-2x-2

5x-6x+10+3= 6-2x-2

-1x+13= 6-2-2x

-1x+13= 4-2x

-1x+1x+13= 4-2x+1x

13-4= 4-4-1x

9= -1x

x= -9

2006-07-26 13:25:41 · 16 answers · asked by sad but cute 2

How many more square feet of tile would it take to cover a cube of side 8' than a sphere of diameter 8'?

2006-07-26 13:15:43 · 6 answers · asked by laqitta 1

2006-07-26 12:55:02 · 7 answers · asked by Anonymous

the question im trying to figure out is lim (below it: x->0) (1+3x)^1/x . i so far was able to get 3 /(x+3x^2) but that is undefined. what am i doing thats worng?

2006-07-26 12:48:33 · 5 answers · asked by Jonathan R 2

2006-07-26 12:39:03 · 7 answers · asked by Anonymous

can somebody explain how to solve these two questions?

5.101001000100001

1.The decimal number above consists of only 1's and 0's to
the right of the decimal point. The first 1 is followed by one 0, the second 1 is followed by two 0's, the third 1 is followed by three 0's, and so on. What is the total number of 0's between the 98th and the 101st 1 in this decimal number?
(A) 288
(B) 291
(C) 294
(D) 297
(E) 300

2.During a sale, a customer can buy one shirt for x dollars. Each additional shirt the customer buys costs z dollars less than the first shirt. For example, the cost of the second shirt is x - z dollars. Which of the following represents the customer's cost, in dollars, for n shirts bought during this sale?

(A) x+ (n-1)(x-z)
(B) x + n(x - z)
(C) n(x-z)

2006-07-26 12:31:25 · 10 answers · asked by Daine W 2

2006-07-26 12:24:11 · 13 answers · asked by adrianchemistry 2

2006-07-26 12:12:59 · 5 answers · asked by Anonymous

2006-07-26 11:19:15 · 3 answers · asked by tikki 2

please give your views.

2006-07-26 10:50:28 · 12 answers · asked by flori 4

Also:

Solve the equation:

m^2=25

2006-07-26 10:33:38 · 4 answers · asked by Brandon ツ 3

Also:

Solve the equation for solution and check for extraneous solutions:

√y+3 = 2√y-7

2006-07-26 10:31:54 · 6 answers · asked by Brandon ツ 3

Also:

Solve the equation for solution and check for extraneous solutions:

√2y^2-1=y

2006-07-26 10:25:01 · 4 answers · asked by Brandon ツ 3

that's x-a times x-b up to x-z...

2006-07-26 10:19:00 · 5 answers · asked by hapie_09 1

I'm not sure if I went about them correctly, but here are the two problems. Any help anyone could provide would be greatly appreciated. Thanks!

--Problem 1--

Find the work done in raising 1,500 pounds of ore from a mine that is 1,500 feet deep. The rope weighs 2 pounds per foot.

1.) The work of the ore is simply W = F * d = 1,500 * 1,500 = 2250000 ft-lbs.
2.) The work of the rope is the integral from 0 to 1,500 of 2x dx = 2250000.
3.) Then add the two together for a total work of 4.5 * 10^6 ft-lbs.

Even if I set Step 2 up like integral[0,1500] of (2)(1,500-x) dx...I still get the same answer.

--Problem 2--

Find the work done in filling an upright cylindrical tank of radius 3 feet and height 10 feet with a liquid that weighs 50 pounds per cubic foot. Assume the liquid is pumped into a hole in the bottom of the tank.

1.) V = pi*r^2*h, so V = 9*pi*delta x
2.) W = integral[0,10] of 50 * 9 * pi * x dx = 450 * pi * x dx = 70,685.83
ft-lbs.

2006-07-26 10:11:17 · 1 answers · asked by JoeSchmo5819 4

lnx/(x^2+1) is f and for f' i got {[(x^2-1)/x] -lnx*2x}/(x^2+1)^2 did i do this rite?

2006-07-26 10:04:33 · 6 answers · asked by Anonymous

2006-07-26 09:46:58 · 14 answers · asked by Anonymous

2006-07-26 09:45:05 · 20 answers · asked by seven69uk 2

the formula i improvised makes use of calculus to perform the same function as binomial theorem in the expansion of the mathematical function; (a+b)^n .do you think someone else has published anywork on that.

2006-07-26 09:33:07 · 4 answers · asked by ovobe 1

12 (21) 26

16 (30) 36

20 (38) 48

24 (54) 60

28 ( ? ) 84

Each numeral series stands on its own.
Their relationship is among the first/second/third numbers.
The relationship is the same for each numeral series.
But each numeral series does not affect each other.

2006-07-26 09:27:37 · 5 answers · asked by CL H 2

2006-07-26 09:20:17 · 4 answers · asked by Anonymous

Isn't it just like saying the derivative of sin x is cos x.

2006-07-26 09:17:44 · 3 answers · asked by Anonymous

2006-07-26 09:14:22 · 16 answers · asked by jusme 1

2006-07-26 09:13:38 · 11 answers · asked by Rachel B 1

and give the right answer

For example

868969362876238468236095740875987455672389649457

2006-07-26 09:10:05 · 12 answers · asked by Anonymous

solve the following system of equations using matrices,do not use decimals.
3c-b=5a+2
-2b-4a=c-1
2c+2=2b+3a

2006-07-26 09:04:35 · 5 answers · asked by shoppinggirl456 2

2006-07-26 08:55:32 · 5 answers · asked by Anonymous

2006-07-26 08:51:23 · 2 answers · asked by Anonymous

not only are you helping them cheat, but you are encouraging them to go on glutting these boards with their trivial boring questions. Are you so desperate for people to see that you know how to do basic math?

2006-07-26 08:39:20 · 17 answers · asked by Anonymous

The product of 5 and three times a number is six less that nine times the same number. Please show your work in words or numbers.

2006-07-26 08:33:19 · 11 answers · asked by Anonymous