Mathematics - 31 August 2007

What all number sets to which 15/3 belongs. What is the most specific set to which it belongs.

2007-08-31 12:06:37 · 4 answers · asked by Yellow Jello 2

please show step by step on how to convert 3.375 cm^3 to m^3

2007-08-31 11:50:22 · 5 answers · asked by coolkenny45 2

I'm trying to help my son solve a extra credit math problem, but am coming up totally stumped. Looking for some mathematicians to give some guidance here. I'm sorry about the formatting , but I haven't figured out a way to get it any better. L=Left R =Right * = the # that needs to be solved for. The dashed lines is my attempt to seperate the combinations. There are nine 3 digit combinations. Here's the problem.

The athletes training for the marathon all have combination locks on their lockers. Find the secret to figuring out the missing numbers for all of the combinations. Look carefully.

L R L--- L R L--- L R L---
12 9 5--- 7 8 *--- 11 * 6---

L R L--- L R L--- L R L---
10 5 *--- 4 16 *--- 3 * 18---

L R L--- L R L--- L R L---
8 9 *--- 2 14 *---- 13 7 *----

What numbers are missing from each combination. What is the secret, for all of them.



Any help will be much appreciated.

2007-08-31 11:45:16 · 4 answers · asked by nickfromct 3

2007-08-31 11:42:41 · 4 answers · asked by Alexander 6

find domain given the function f

f(x) = sqr(25 - x^2)

f(x) = sqr(x^2 - 5x)

f(x) = sqr((3 - x) / (x + 2))

can any one show me steps / methods plz
thanks

2007-08-31 11:34:44 · 7 answers · asked by Oliver 2

2^1*2^(n-1)
Then
2^(n-1+1)
2n... many of you would understand this but what i don;t understand is where did multiply 2 go... it wasnt divided by 2 so its not neutralized ?? but somehow its not there and this must make sence.. to me it doesn't please explain..

2007-08-31 11:30:54 · 4 answers · asked by Anonymous

2007-08-31 11:25:40 · 4 answers · asked by sp4rkle13 1

Hey all,here to test the general publics math skills again....Its a word problem & here it is ; It is sort of a trick question,so be careful when you answer.Goodluck!!

You write a check out to your friend for 300 dollars.Your friend gives you 300 dollars cash and lets you borrow 300 dollars as well. Now, you go shopping & write out another check for 600 dollars.Then you goto the bank and deposit 600 dollars.How much did you actually spend?

Goodluck!!

2007-08-31 11:14:57 · 6 answers · asked by sawkilla1 1

2007-08-31 11:10:46 · 3 answers · asked by Awesometown13 1

On the bottom right corner on paint you can change the length and width of the page and on the bottom they show numbers sorta like a grid or something... is there a way to figure out how big is an 8 1/2 x 11 sheet of paper. I already tried making the page 8 1/2 x 11 and its a tiny tiny square so i was thinking we cant use inches but i'm not the best at math we could say so if anyone knows post it here and ill give you 10 points.

2007-08-31 11:01:33 · 4 answers · asked by courtneygrater838 2

IT'S A 2in. by 4in. board and it's 12ft long. What is the total surface area. Can you please show your work?

2007-08-31 10:52:19 · 8 answers · asked by dominique892001 2

Please show work if possible or explain...

2007-08-31 10:51:50 · 5 answers · asked by Deutschjoe 3

6: A boat went 15 km upstream in the same time it went downstream 45 km. The boat’s speed in still water is 10 km/h. What is the speed of the current?
5 km/h
6 km/h
7.5 km/h
9 km/h


7: Amanda can paint a room in ten hours. Michael can paint the same room in eleven hours. How long does it take for both Amanda and Michael to paint the room if they are working together?
2 hours
3.5 hours
4 hours
5 5/21 hours


8: It takes one inflow pipe 3 hours to fill a pool, it takes another inflow pipe 5 hours to fill the same pool. How long will it take to fill the pool if the two pipes were running together?
1hours
1.5 hours
1 7/8 hours
2 2/3 hours


9: Two machines are filling soda bottles. The machines can fill the daily-quota of soda bottles in 10 hours and 15 hours, respectively. How long would it take to fill the daily-quota of soda bottles with both machines working together?
3 hours
4 hours
6 hours
8 hours


10: A gardener can trim a garden in 4 hours. An apprentice can trim the same garden in 6 hours. How long will it take to trim the garden if they both work together?
2 hours
2 2/5 hours
3 hours
3.5 hours

2007-08-31 10:47:53 · 5 answers · asked by kitara 1

2007-08-31 10:43:46 · 4 answers · asked by Anonymous

Do i need to know much of algebra 2 for trigonometry?

2007-08-31 10:38:23 · 8 answers · asked by Anonymous

I am having a hard time with this problem and the text isn't clear to me:

Solve:
(square root 4x + 4) + 12 = 0

2007-08-31 10:35:44 · 6 answers · asked by casper5 3

2007-08-31 10:32:33 · 3 answers · asked by Anonymous

i have a pre-algebra book, and this problems has a decimal...here it is


-110/2.5=


my answer show up as (-4 . remainder 10) but the book saids
-44, and i check out the caculator and it says the same thing too (-44)


did i do anything wrong?....or did i miss something?....

2007-08-31 10:27:08 · 7 answers · asked by Aj 1

I'm having a hard time understanding the text:

Solve using Square Root Method.
x^2 + 5 = 41

2007-08-31 10:24:53 · 5 answers · asked by casper5 3

A group of four students wish to cross a bridge without side rails in the middle of the jungle very late at
night. They have one lantern to share. No one may take a step without holding the lantern (it's dark at
night with no moon). No more than two people may be on the bridge at one time, not even for a
moment. When two students walk together, they must move at the rate of the slowest person. What is
the shortest time it would take for all of them to get across? Use the following information to solve the
problem:
• The first student, Joe, can cross the bridge alone in 5 minutes.
• The second student, Torey, can cross the bridge alone in 10 minutes.
• The third student, Sarah, can cross the bridge alone in 20 minutes.
• The fourth student, Mike, can cross the bridge alone in 25 minutes.
my dad asked me this question i thought the answer was 120 mins but he says it isnt wat is the answer

2007-08-31 10:22:39 · 7 answers · asked by Anonymous

Is the sqaure root of 5.76 rational or irrational?
why or why not?

2007-08-31 10:19:38 · 1 answers · asked by Yellow Jello 2

any thoughts???

2007-08-31 10:19:10 · 5 answers · asked by Kadie k 1

1: What number, when added to the numerator and denominator of 3/7, changes 3/7 into a fraction equivalent to 7/9?
7
11
12
13


2: What number, when added to the numerator and denominator of 11/15, changes 11/15 into a fraction equivalent to 4/5?
2
3
4
5


3: What number, when added to the numerator and denominator of 1/8, changes 1/8 into a fraction equivalent to 3/4?
10
12
20
22


4: A boat can travel at 10 mph in still water. It travels 75 miles downstream with the current in the same time it travels 25 miles upstream. What is the speed of the current?
5 mph
6 mph
7 mph
12 mph


5: This airplane would travel 350 mph in still air. However, airplanes always travel on air currents. With the air current, the airplane travels 1120 miles in the same time that it travels 980.1 miles against the air current. Find the speed of the air current. (This is just like the water current problems.)
17.8 mph
23.3 mph
26 mph
27.6 mph

2007-08-31 10:17:35 · 6 answers · asked by kitara 1

{-6,,-4/5,,0,,0.8,,square root of 5,,pie,,square root of 25}

2007-08-31 10:13:49 · 3 answers · asked by Anonymous

{-8,,-6/7,,0,,0.3,,sqare root of 7,,sqaure root of 8.7..square root of 36}

2007-08-31 10:12:24 · 3 answers · asked by Anonymous

2007-08-31 10:12:02 · 7 answers · asked by greg r 1

find the derivative of

7x^4 sqrtx + (-5)/(x^3sqrtx)

thanks

2007-08-31 10:11:38 · 1 answers · asked by Mr. Rain 1

Im not trying to cheat i need the help, its not a test.

2007-08-31 10:10:53 · 2 answers · asked by Kadie k 1

a) Give the discriminant for the quadratic equation.


b) State the nature of the roots.

2007-08-31 10:10:46 · 3 answers · asked by erin j 2

am having a big problem in it help!

2007-08-31 10:09:02 · 9 answers · asked by ? 2