Mathematics - 30 August 2007

x=24+xy:x=-12
How do you solve?

2007-08-30 10:23:54 · 8 answers · asked by Anonymous

2007-08-30 10:19:45 · 17 answers · asked by Anonymous

Solve this:
According to the rule of thumb, every five seconds a lightning flash and the following thunder give the distance of the storm in miles.
Assuming that the flash of light arrices in essentailly no time at all estimate the speed of sound in m/s from the rule.

Show work if possible, thanks.

2007-08-30 10:07:47 · 4 answers · asked by Anonymous

Simplify. Assume x represents a positive number sqrt 45x^4

2007-08-30 10:07:12 · 6 answers · asked by vadataborn 2

Dus any1 kno an everyday object that weighs 1 kilogram

2007-08-30 10:06:15 · 8 answers · asked by Anonymous

2007-08-30 10:03:48 · 25 answers · asked by ckdwebster 1

I am a substitute teacher, and I am covering a trig class on Friday. The teacher of this class is in the hospital and she didnt leave any work. I found the questions in a book, but there a no answers.

(1) Given the angle a and the radius r, to find the length of the subtending arc.
(a) a=0degrees 17 minutes, 48 seconds, r= 6.2935.

(b) a=121 degrees 6 minutes, 18 seconds, r= 0.2163

2.
Given the length of the arc L and the radius R, to find the angle subtended at the center.
(a) L=.16296, R=12.587.

(b) L=1.3672, R= 1.2978.

3.

Given the length of the arc L and the angle A which it subtends at the center, to find the radius.

(a) a= 0 degrees, 44 minutes, 30 seconds, L= .032592.

(b) a= 60 degrees, 21 minutes, 6 seconds, L=.4572.

4.A railroad curve forms a circular arc of 9 degrees, 36.7 minutes, the radius to the center line of the track being 2100 feet. If the gauge is 5 feet, find the difference in length of the two rails to the nearest half-inch.

Thank u

2007-08-30 09:56:57 · 6 answers · asked by brownboy0627 2

can't get this ones!!! I think the answers are 1.45x10^39 0.445 and 17.125..... but why_ please help!!

∫ [0 to 1 ] (1-√x)^50 dx


∫ [0 to 4] dx/((1+√x)^3)

∫ [1 to 64] cubit root of X / ( 2 + cubic root of (X^2)) dx

2007-08-30 09:52:58 · 2 answers · asked by Carrera 2

Could you please explain how you come to an answer with the following problem:

(A) 2/3 + 5/6 + 11/12 and

(B) 2 3/4 + 1 1/5

Thank you so much for your help! I'm stuck and my son and I are going nuts trying to figure this out.

2007-08-30 09:50:40 · 8 answers · asked by Anonymous

1. x^2/ x^2-25 plus 7x+10/x^2-25

2. 3x+5/ x+3 minus x-1/x+3

3. 2x/x-3 minus 6/x-3

4. 2x+1/x-3 plus x+2/3-x

5. 2x+1/3 plus -x+2/3

6. 4-x/x-9 minus 3x-8/9-x

7. 2/x minus 1/x = x/ 3x+10

8. x/8 = 1/ x+2

9. x= 5/ 6-x

10. 8/ y-3 = 6/y+4

2007-08-30 09:46:30 · 4 answers · asked by kiss k 1

2007-08-30 09:45:38 · 1 answers · asked by nisha10mabry 3

could you show me how to work it

2007-08-30 09:43:50 · 2 answers · asked by nisha10mabry 3

could you show me how to work it

2007-08-30 09:42:12 · 2 answers · asked by nisha10mabry 3

The problem is 2x+y=80. idk if i need to solve for x or y.

2007-08-30 09:38:58 · 3 answers · asked by Lauren 2

is y a function of x?

how do u know??

2007-08-30 09:28:15 · 3 answers · asked by [xo♥ox] 1

i know how to distribute but if i do that i get 3x on both sides and i dont know how to do it if you have the same variable on both sides, any help? i need the work 2

2007-08-30 09:23:22 · 4 answers · asked by Tom H 1

so this is a table:

No. of people (p) 1 2 3 4 5 6 7
Cost of a Holiday (c) £145 £200 £255 ........ ......... ......... ........
formula c= ...... x P + ........

Complete the tables and find a formula conneting the two letters.

No. of Teachers (T) 3 4 5 6 7 8
No. of Pupils (p) 13 18 23 ..... ..... .....

p = .... x t + .....

No. of Trees (t) 4 5 6 7 8 9
No. of bannanas (b) 30 50 70 ..... ..... .....
b= ..... x t +/-

2007-08-30 09:18:58 · 4 answers · asked by **Lilyanne** 3

HOW DO YOU FIGURE THESE OUT ???

1) on a winter morning the temp was -6 degrees. by noon the temperature increased by 10 degrees. what is the noon temp

2)on three winter mornings the temp was -6 degrees -14 degrees and 8 degrees find the average temp.!!!!

2007-08-30 09:14:11 · 11 answers · asked by realist86 3

I was once with me buddies working down a keg at a gathering and we were well along. They were asking Mr. Smarty pants (wink) all sorts of science and math questions. And I was having no trouble with them, it was quite impressive. However after maybe 15 minutes someone asked "Whats the square root of the number of beers you drank?" And for some reason I just was stunned by that. After having had 14, I was simply unable to determine the answer. I sat and thought for a minute and was forced to answer with... "ssshit man, I dunno but i think I might now in about 2 more beers"

2007-08-30 09:10:18 · 4 answers · asked by billgoats79 5

Please help solve this problem...

Solve the equation for b1

A= 1/2h(b1+b2)



Also do you need to reduce anyhting in the following fraction?

36/8y^4

2007-08-30 09:08:50 · 7 answers · asked by Anonymous

if x + y = 0.56

given that y is always 1.67 times higher than x
how much is x worth
how much is y worth

how do work it out?
clever people please help

2007-08-30 09:08:18 · 5 answers · asked by R I P 2

if a baseball is traveling at 105 mph what is the speed in m/s?

i just need to know how to convert, i know that 1 mile = 1.61km and 1km = 10^3m



thanks

2007-08-30 09:02:55 · 10 answers · asked by ilikegcalot 1

3x^2 + y^2 = 3
how do i find center and how do i know this is an ellipse, is this the general form of an ellpse.

thanks if you can help

2007-08-30 08:43:13 · 3 answers · asked by Boo Radley 4

From a point on the floor the angle of elevation to the top of a door is 47 degreees, while the angle of elevation to the ceiling above the door is 59 degrees. If the ceiling is 10 feet above the floor, what is the vertical dimension of the door?

2007-08-30 08:41:49 · 5 answers · asked by L J 3

how do you do this pleasee helppp??

2007-08-30 08:30:26 · 8 answers · asked by realist86 3

2007-08-30 08:28:46 · 4 answers · asked by Anonymous

first question: which comes first, sin or cosine when you are talking about a value like, (x,y). would x be sin and y cosine or is it vise versa

second question: today after our teacher annouced that we will be having a quiz, he said that we should memorize identities and values and then he started numbering like 0, 30,45,60,90,180,270 and then he'll be like what's the sin of such and such a number and the answers would be like pie/2 or pie/3. i thought it would be answers like 1/2 or square root of 2/2.

am i making sense. im so lost. is there other values for sin and cosine that have pies in the answer

and could you guess what identities he was talking about coz there seems to be a lot in calculus

2007-08-30 08:16:12 · 5 answers · asked by meju 3

the equation started as (x-3)²=4(y+6) and when i work it out i get y=x²-6x-15 over 4. I'm tryin to graph it but if i plug in 2 and 4 for the values of x, the value for y is the same for both of em. isn't that not supposed to happen?

2007-08-30 08:01:16 · 2 answers · asked by Anonymous

2007-08-30 08:00:54 · 5 answers · asked by loverofpower 1

how long is one side of the playground and go to nearest tenth

Thanx

2007-08-30 07:57:20 · 9 answers · asked by Anonymous