Mathematics - 25 August 2007

x^2/9-y^2/81=1

2007-08-25 06:03:10 · 2 answers · asked by Anonymous

2007-08-25 06:00:13 · 11 answers · asked by need2noplz 1

is 5 or less

2007-08-25 05:57:23 · 5 answers · asked by Anonymous

|1 0 4| |1 0 4|
|3 0 9| = k |3 0 9|
|5 5 20| |5 5 20|

2007-08-25 05:47:48 · 2 answers · asked by Anonymous

7 4
5 4

2007-08-25 05:44:29 · 2 answers · asked by Anonymous

solve the system of equations algebraically

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

2007-08-25 05:39:05 · 4 answers · asked by Anonymous

A spherical balloon with radius r inches has volume defined by the function below. Find a function that represents the amount of air required to inflate the balloon from a radius of r inches to a radius of r + 2 inches.

I took V(r)=4/3pi(r+2)^3 and subtracted it from the orignal formula V(r)=4/3pir^3 now do the 4/3pi cnacel each other out? leaving me with 6r^2+12r+8? or do you just subtract the (r+2)^3 from r^3 leaving you with 8pir^2+16pir+(32/3pi)?

2007-08-25 05:38:39 · 1 answers · asked by m_carl 1

2007-08-25 05:31:30 · 8 answers · asked by shawna 2

Suppose you are given the formula (y+3)/4 = ± (x+2)/9 for the asymptotes of a hyperbola. What is the formula for the hyperbola?

A You can’t tell because when you square both sides you might introduce extraneous roots.
B (y+3)^2/16 – (x+2)^2/81 = 1
C (y+3)^2/4 – (x+2)^2/9 = 1
D (x+2)^2/81 – (y+3)^2/16 = 1
E (x+2)^2/9 – (y+3)^2/4 = 1
F You can’t tell because you don’t know whether it opens to the sides or up-and-down.

2007-08-25 05:29:04 · 2 answers · asked by Anonymous

2007-08-25 05:21:40 · 15 answers · asked by Anonymous

Equation #1 =
-u^2 = 6 + 7u

Equation #2=
-((2x+1)/x) = 6+7( sqrt ((2x+1)/x))

Solve for x.
(notice that equation 2 is equation 1 when sqrt ((2x+1)/x) is substituted for u)
(i got that "u"= -6,-7 and then i set it equal to sqrt ((2x+1)/x) but it doesn't work out... please help!)

2007-08-25 05:21:33 · 4 answers · asked by dunnohow 4

even though i am only thirteen im eager to get my maths SATs results at the highest possible so plz can u give us an website to help me and i would like if you lot could get the website which actually explains evryting in detail..

2007-08-25 04:32:16 · 4 answers · asked by asnfjab a 1

4n^2 - 4n - 35 = 0
6m^2 + 19m + 10 = 0

I need to find the roots of each equation. Can you just tell me the numbers from the two parantheses? for example, the answer would be (3m+2)(m+5). i need something like that

Thanks in advance!

2007-08-25 04:29:59 · 6 answers · asked by Anonymous

Please help me solve this one....I just don't understand how to do this.

2007-08-25 04:19:25 · 16 answers · asked by isis0813 1

2007-08-25 04:18:31 · 6 answers · asked by Anonymous

A rock is thrown upward at an initial velocity of 42 ft/sec from a platform 28 ft high. How many seconds will it take to hit ground? (Round to 2 decimal places.)

2007-08-25 04:09:01 · 4 answers · asked by Anonymous

If I don't want to teach, what else can I do with a BA in mathematics. I'd like something that involves computing, doing mathematical operations and stuff..I enjoyed doing algebra..I feel like this could be a suitable job for me...something in finance. Any ideas?

2007-08-25 03:57:40 · 5 answers · asked by momoray2002 1

I'm working on a multiple choice and the answers are different than my answers...

Here are the distances:
1. (-4,2) - (4,-2)
2. (-1,3) - (-3,-2)
3. (1,4) - (3,0)
4. (-4,2) - (4,3)

For problem 1. my answer was 4√5 and the only choices are
√86
√89
2√17

I don't know what to do...

2007-08-25 03:56:44 · 5 answers · asked by kiki Dee 5

0.000419

2007-08-25 03:53:02 · 4 answers · asked by Anonymous

I must be missing the obvious here.

If you have a five gallon milk jug and a three gallon milk jug, how do you measure exactly one gallon without wasting (pouring out) any milk.

I came up with filling up the three gallon jug and pouring it into the five gallon jug and then repeating it. When the five gallon jug is full, you have one gallon left in the three gallon jug. But this is not the answer he is looking for.

Thanks!

2007-08-25 03:52:08 · 6 answers · asked by I ♥ old VW's 4

and where?

2007-08-25 03:45:11 · 4 answers · asked by ineedmathhelppeas 1

2007-08-25 03:43:56 · 3 answers · asked by serena p 1

1. The soln of 9Xsquare+30x+25=0 is a ______set.
Means Singleton, Infinite or Null?
2. If H.C.F of p(x) and q(x) is 1, what's their L.C.M?
3.For what value of discriminant D, quadratic equation doesnot have real root?
4.By which number the sum of a two digit number and number obtained by interchanging it's digits is always divisible?
5.The sum of digits of a two-digit number is same as product of it's digits. Then, the number is_______. i.e. a.11 b.23 c.10 d. 22

2007-08-25 03:40:56 · 8 answers · asked by Anonymous

like how many spaces to move the decimal and stuff? with examples? thanks soooo much!

2007-08-25 03:33:37 · 3 answers · asked by ineedmathhelppeas 1

when dividing exponents do you subtract them?

2007-08-25 03:23:34 · 4 answers · asked by xrandomnessx 2

theta^3/3!

what does the explanation point mean in the above fraction?

2007-08-25 03:08:00 · 2 answers · asked by RogerDodger 1

I don't know what wrong i've done,I can't get the right answer for these.

1) Use the expansion of (2-x)^5 to evaluate (1.98)^5 .

2) The first term of an arithmetic progression is a and the common difference is d. If the 5th, 9th and 16th term form a three term geometric progression with common ratio r, find the value of d in terms of a.

2007-08-25 02:37:33 · 3 answers · asked by aMused 2

Binomial expansion:

Use the expansion of (x+y)^4 to evaluate (1.03)^4 .

2007-08-25 01:49:18 · 7 answers · asked by aMused 2

My mind is going blank this morning as I try and finish my overdue homework!! Please walk me thru a couple problems using the Addition Method..

1) x+y=1
2x-y=5

2) x-2y=7
3x-2y=9

3) 4x-8y=5
8x+2y=1

4)3x+6y=7
2x+4y=5

5) 3x-4y=0
4x-7y=0

THANKS A MILLION FOR ANY HELP!

2007-08-25 01:33:24 · 7 answers · asked by ♥ ღAngelicaღ♥ 2

especially the one with the number that does not have a perfect square root. help me solve this equation. x exponent 2 is equal to 81

2007-08-25 01:11:42 · 8 answers · asked by jhing 1