Mathematics - 26 July 2007

the rate traveled from Amarillo to austin by bus averages 60miles per hour.The bus arrived in Austin after eight hours of travel .An automobile averages 48 miles per hour.Using the inverse variation relationship,show what the time would be for the automobile to complete trip

is it 14.4 or 12 hours now?

2007-07-26 17:02:05 · 3 answers · asked by hola_kity2008 1

2007-07-26 16:55:35 · 3 answers · asked by Anonymous

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y = 0, y = x(6 - x) about the axis x = 0

Washer method:
V = A * h
V = pi(r2^2 - r1^2)h

(1296pi/5 is not the solution)

2007-07-26 16:44:28 · 1 answers · asked by goodguy083 1

Hi. I would really appreciate it if somebody could please help me with my homework or else I get a big fat zero. The teacher wouldn't explain it to me and he told me to figure it out on my own and left. What a jerk. But anyway, whoever gives thorough step-by-step instructions in the easiest way will earn Best Answer by me. Thank you ahead of time! Oh and I don't know what I am suppose to write for the square root symbol. So I will just put / meaning square root. Like /4 would be the square root of 4. There are about 40 problems in my assignment so don't think that the following problems are just so you can do my homework for me hehe. I just picked out the ones that would probably be the hardest.

Simplify each expression:
1) /50 over 9
2) -2/10 times /8
3) 2/126 over /14
4) -/189
5) 4/6 + 3/2 over /6
6) 3 + 2/7 over /7

7) Adding/Subtracting: /8 - 15/2
8) /12 + 7/27
9) -3/2 + /18

2007-07-26 16:40:46 · 3 answers · asked by Anonymous

may i get an example of a
direct
inverse
joint
and combine

2007-07-26 16:33:53 · 0 answers · asked by Anonymous

4x2 - 16 = 0

2x2 = 16

x2 + 5 = 0

x2 + 5x - 6 = 0

x2 - 25 = 0

3x2 = -9x

2x2 - 4x + 1 = 0

3x2 + 2x = 7

x2 + 8x + 9 = -7

2007-07-26 16:31:49 · 3 answers · asked by Anonymous

2007-07-26 16:29:24 · 1 answers · asked by bilinmz 1

I am unsure of how to radical signs on the computer.

2 radical 3-4 radical 2+6 radical 3+8 radical 2

2 radical 3 + 3 radical 5 - 4 radical 5

3 radical 12 + 4 radical 18

-2 radical 8 + 2 radical 2 - 3 radical 18

radical 9x^4 + radical 16

radical a^4 + radical a^5

2 radical 12x^3y^3 - radical 3xy

radical 32a^8b +radical 50 a^16b

2007-07-26 16:28:58 · 2 answers · asked by Anonymous

I know that the answer is 2X+3 but I can not figure out how to get to that answer.

2007-07-26 16:26:48 · 6 answers · asked by Anonymous

A scale model of a hydroelectric dam is 1.2 feet high. The ratio of the height of the model to the height of the dam is 1:167. How tall is the dam, in feet?

2007-07-26 16:23:48 · 4 answers · asked by Guy 1

when i divide (3x^2+7x-18)/(x-3)
i get 3x+16- over 30 with three squares left for me to fill it
does x-3 go in those squares

2007-07-26 16:18:04 · 2 answers · asked by yoshi_gurl08 1

16a^2-32a+9 from 12a^2+60a-8
and i get

4a^2+28a+1

2007-07-26 16:12:13 · 4 answers · asked by percy m 1

what do you get when you divide 5a^2+6a-9 into 25a^4+19a^2-a-78

2007-07-26 16:04:31 · 2 answers · asked by percy m 1

I thought I understood this until I actually tried to do it. Okay, so let me get this straight. Say, to get y alone you have to multiply each equation by the coefficient of the opposite equation? In my book, it shows the bottom number being negative. Why?

Here, perhaps if I give an actual problem it'll be easier to explain my confusion.

Here's an example:
(1) 5x+3y=4
(2) 7x-4y=22

In my textbook, they multiply (1) with 4 and equation 2 with 3.
This is where I get confused. In some of these example problems they use a negative for the bottom number and I cannot figure out why. Can someone explain to me what's going on at this step because my book doesn't do a good job in explaining it.

In another example they do
1) -12x+9y=5
2) -8x+6y=-11

and they multiply the first by -2 and the second equation with 3. WHY? I don't understand what's going on here at all!

2007-07-26 16:01:31 · 3 answers · asked by Anonymous 1

4a^4+6a^3b^2+2a^2b^3

my answer is 2a^2(b^3+3ab^2+2a^2
but im wrong may you correct me.

2007-07-26 15:58:54 · 5 answers · asked by percy m 1

Find the first partial derivatives of the function at the given point.
help appreciated!
a. g(x,y) = sqrt(x^2+y^2) ; (3,4)

b.f(x,y) = e^xy (e to the xy) ; (1,1)

2007-07-26 15:46:46 · 2 answers · asked by jeff 1

i dont understand this graph and the question .

Here i have uploaded

http://img507.imageshack.us/my.php?image=scan0001zj3.jpg


kindly , please help

what does it mean by turnover as per the question ?

there is no "turnover " mentioned in the graph and so i am confused.

please help

2007-07-26 15:21:22 · 3 answers · asked by calculus 1

...that are symmetric with (a) the x axis, (b) the y axis, and (c) the origin.

I have no clue how to do this...I need some help 4realz...

2007-07-26 15:09:14 · 5 answers · asked by jaz 5

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y = 0, y = x(6 - x) about the axis x = 0

V = integral(low: a, up: b) A(x) dx

2007-07-26 15:02:33 · 2 answers · asked by Anonymous

(square root) (45 x^8)

Assume that all variables represent positive real numbers.

2007-07-26 15:00:02 · 5 answers · asked by Amy 1

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y = 6x^2, x = 1, y = 0, about the x-axis

V = integral (low: a, up: b) A(x) dx

2007-07-26 14:58:48 · 2 answers · asked by Anonymous

A ball of radius 17 has a round hole of radius 6 drilled through its center. Find the volume of the resulting solid.

(Subtracting one from the other is incorrect)

V = integral (low: a, up: b) A(x) dx

2007-07-26 14:53:25 · 6 answers · asked by Anonymous

2007-07-26 14:47:11 · 7 answers · asked by Anonymous

What is the inverse Laplace transform of the following:
e^(-a * sqrt(s))

I've tried doing this using computer software, and it's not giving me an answer. An explanation would be helpful.

2007-07-26 14:31:11 · 2 answers · asked by whitesox09 7

the equation of the plane is: ax+ay+z=a

2007-07-26 13:53:42 · 2 answers · asked by Mr. Smith 1

Gasoline is about $2 per gallon. You use about 1 1/2 gallons each day driving to and from work. How much should you budget for gasoline over the next month (about 20 workdays

2007-07-26 13:30:06 · 7 answers · asked by turlington999 1

I came across the following question on an IQ test, the answer to which I was left guessing on, after several minutes trying to solve it (non-mathematically):

Water is dripping into an empty glass. Each minute, the number of drops doubles. The glass is full in one hour. How many minutes does it take to fill the glass up to half?

a. 30 minutes
b. 40 minutes
c. 59 minutes
d. 1 minute
e. 23 minutes

2007-07-26 13:22:55 · 12 answers · asked by BeautifulGirl 2

Ok... it's a square of 8,192 square feet and each block is 8 inches in height and 16 inches in length. How many of these blocks can fit in that amount of square feet?!? Seem simple?!? Think again...

Help please!!!

2007-07-26 13:12:59 · 6 answers · asked by Ruby S 1

Simplify the expression .
( y + 4 ) ( y - 5 ) / ( y - 5 ) ( y + 6 )

y + 4 / y + 6

2y - 5 / 2y + 1

y - 4 / y - 6

y + 5 / y + 1

2007-07-26 13:06:52 · 2 answers · asked by Anonymous

Support whenever invited to a party, the probability that person arrives with a guest is 1/3, arrives alone is 1/3, and doesn't attend is 1/3. If the company invites all of its 300 employees and their guests, what is the probability that at least 320 arrives?

2007-07-26 13:02:45 · 1 answers · asked by kayedimanche 2