Mathematics - 5 September 2007

abcde
x 4
_____
edcba

2007-09-05 23:56:36 · 9 answers · asked by fantasyofmagic 1

2007-09-05 23:53:44 · 10 answers · asked by george 1

Two observers, at the same time, measure the angle og elevation of a helicopter. One angle is measured as 35 degrees and the other angle as 50 degrees. If the observers are 200 feet apart and the helicopter lies over the line joining them, how high is the helicopter?

2007-09-05 23:39:47 · 3 answers · asked by journey 1

2007-09-05 23:13:12 · 7 answers · asked by Truenoob 2

Hi. Any help would be appreciated, here's the question:

You choose 30 from a universe of 60.
Someone else chooses 30 from the same universe.

What are the chances that no element is a member of both sets? Is it the same likelihood that all elements are members of both sets?

Thank you.

2007-09-05 22:33:10 · 1 answers · asked by awakening1us 3

I know theres 4 step equatioons but can you get 12 step equations? whats the highest you can get?

2007-09-05 22:30:24 · 2 answers · asked by Anonymous

Find a line tangent to the curve y = X^(1/2)

at x=4

2007-09-05 21:46:05 · 8 answers · asked by ZinkyPh 1

1.) 1/y +1 added by 1/y 2.)4(f-g)^2 divided by 3(f-g) 3.)c^3-27/c-3

2007-09-05 20:59:27 · 2 answers · asked by kamote 1

6y^-2 + y = 0

2007-09-05 20:50:53 · 7 answers · asked by i<3WL 2

take the formula (X^3+n^3)/(x+n). Take values of x (for arguments sake) from-20 to 20, and for each value of x plot a curve for values of n from -20 to 20. In each case you'll get a lovely smooth curve for every point except where x = -n. At this point you will be dividing by zero so the curve will spike to infintiy. At each point where the spike happens you can predict what the output value of the formula should be to keep the curve smooth. For example where x=1 and n=-1, an output value of 3 would produce a perfect smooth curve. Similarly where x=2 and n=-2, a value of 12 would keep the curve smooth. Am I missing something? Have I made a mistake in the way I'm calculating? Or is this just genuinely a weird set of curves?

2007-09-05 20:50:07 · 3 answers · asked by Anonymous

A grasshopper makes four jumps. The displacement vectors are (1) 22.0 cm, due west; (2) 27.0 cm, 43.0 ° south of west; (3) 29.0 cm, 59.0 ° south of east; and (4) 26.0 cm, 54.0 ° north of east. Find (a) the magnitude and (b) direction of the resultant displacement. Express the direction as a positive angle with respect to due west.

2007-09-05 20:25:22 · 4 answers · asked by lonelygirlinhell 1

2007-09-05 20:19:28 · 2 answers · asked by Cheese me 1

2007-09-05 20:19:01 · 2 answers · asked by Anonymous

to solve such questions,one should use the reciprocal identities, pythagorean identities, and ratio identities. the number "2" found beside the word "cot" is an exponent.

2007-09-05 20:18:57 · 2 answers · asked by Anonymous

Determine the arc length of the asteroid given parametrically by

x(t) = 5 cos^3 (t)
y(t) = 5 sin^3 (t)



PLEASE show me the steps!

2007-09-05 20:15:23 · 2 answers · asked by Anonymous

[2(y+1)^1/2 - y(y+1)^-1/2] / (y+1) = ?

2007-09-05 20:11:55 · 5 answers · asked by i<3WL 2

Can anyone tell me how to do this problem?

Find the slope of the line passing through the x-intercept of -4 and the y-intercept of -9.

2007-09-05 19:54:23 · 5 answers · asked by Vonnie 2

2007-09-05 19:31:59 · 4 answers · asked by Anonymous

a) How many kiloliters will pass a given point in one day?

b) If sodium hypochlorite solution conataining 10% available chlorine is being used to chlorinate this main, at what rate (liters/hour) will the sodium hypochlorite be applied to achieve a dose of 1.5mg/L chlorine ?

nedd to see the showing out

Please help

2007-09-05 19:05:25 · 2 answers · asked by Anonymous

Question 1

Two bicyclists, starting at the same place, are riding toward the same campground by different routes. One cyclist rides 1280 m due east and then turns due north and travels another 1830 m before reaching the campground. The second cyclist starts out by heading due north for 1480 m and then turns and heads directly toward the campground. (a) At the turning point, how far is the second cyclist from the campground? (b) What direction, measured as a positive angle relative to due east, must the second cyclist head during the last part of the trip?

Question 2
A person is standing at the edge of the water and looking out at the ocean. The height of the person's eyes above the water is h = 1.9 m, and the radius of the Earth is R = 6.37 x 106 m. (a) How far is it to the horizon? In other words, what is the distance d from the person's eyes to the horizon? (Note: At the horizon the angle between the line of sight and the radius of the earth is 90°.)

2007-09-05 18:37:16 · 3 answers · asked by ? 2

it's for chemistry-- Any info IS helpfull!!! yes, it is a hw question,, i know,,, i know.. sadly this is my only hope..
thank's for reading... good night--

2007-09-05 18:34:16 · 10 answers · asked by ren b 1

A coffee manufacturer want to market a new blend of coffee that will cost $3.90 per pound by mixing two coffees that sell for $2.75 and $5 per pound, resptively. What amounts of each coffee should be blended to obtain the desired mixture? Assume that the total weight of the desired blend is 100 pounds....i dont get this one at all please tell me how to get the the answer...i just dont want the answer itself...thanks

2007-09-05 18:32:08 · 5 answers · asked by Christine V 1

Find the standard form of the equation of the circle having the following properties:

Center at the origin
Containing the point (-4,1)

2007-09-05 18:12:17 · 5 answers · asked by lifeiscake 3

This is an interview question and I could not solve it after breaking my head over it.

Write any 3 numbers. It is always possible to find a subset (of size 1,2 or 3) of ADJACENT numbers among these 3 numbers that add up to a multiple of 3. Why is this so?
Generalizing, write any 'n' numbers. It is always possible to find a subset of adjacent numbers from among them that add up to a multiple of "n". Why is this so? Give proof.

2007-09-05 17:53:09 · 11 answers · asked by senthil k 1

I am trying to complete my algebra homework, but am stuck on three problems. Could someone help me solve these? And could you please show your work and simplify the problems? I won't learn anything if I just see the answer. Thank you SO VERY MUCH in advance for your help!!!

-4.0x+2.7-1.6=-4.6x+2.7
x=?

-5(3w-3)+(1+16w)=0
w=?

-5(1-2z)+4(3-z)-7(3+z)=0
z=?

Thanks again!!!

2007-09-05 17:52:12 · 6 answers · asked by mrsdynamite 2

A bus leaves a station at 1 P.M., traveling west at an average
rate of 44 mi/h. One hour later a second bus leaves the same station, traveling
east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart?

2007-09-05 17:24:49 · 5 answers · asked by thecookfamily00 1

this question is so easy yet hard, i know how to do it but it doest look right.

you are taking part in a charity walk a thon where u can either walk or run. you walk at four kilometers per hour and run at 8 kilometers per hour. the walkathon last 3 hours. money is raised based on the total distance you t ravel in the three hours. ur sponsors donate 15 dollars for every kilometer u travel. write an expression that gives the total amount of money u raise. evaluate the expression if u walk for two hours and run for one





OHH MYH AND!!

2007-09-05 17:20:24 · 10 answers · asked by مدينا Medina ☪ 6

find the exact value of each of the remaining trig functions of theta.

sin theta = -2/3, 180 degrees < theta < 270 degrees

how do I do this?? Please help and explain, thanks

2007-09-05 17:15:20 · 3 answers · asked by rickyricardoiscool 1

using the reference angle to find the exact value of each expression . . . without calculator

a) csc (7pi)/4, I said it's coterminal with (pi/4) so csc (7pi)/4 = csc (-2pi +(pi/4)) so csc = (pi/4) = sq root 2

did I do this right??

and how would i do this one??

b) cos (2pi) / 3


and c) sec (11pi)/4

sorry my book does a crappy job explaining this so I'm just having a hard time, if you could please help me, I would appreciate it! THANKS

2007-09-05 17:08:42 · 3 answers · asked by rickyricardoiscool 1

I completely lost. Some people have suggested L'Hospital's Rule and some other stuff that my class hasn't covered. Right now, the teacher simply wants us to solve algebraically, not using some special properties. For example, in
lim x-->0 of sin2x / x I multiplied the top and the bottom by 2, making 2sin2x/2x, can celling the sin2x/2x, and leaving 2, so the limit was = 2. Something similar has to be done with these problems, thing is, I have no clue what to do.

remember that
sinx/x = 1 and 1-cosx/x = 0

I also don't know how to algebraically solve these 2 (and by the way, this is not homework, just practice for an upcoming test)

#3:
what is [ lim x-->0 ] the limit of ( sin^2(x) ) / (x) ?

#4

what is [ lim x-->0 ] the limit of ( x^2 ) / ( 1-cos(x) ) ?

and of course, the one in the actual question,

what is [ lim x-->0 ] the limit of ( x + sin(x) ) / (x) ?

2007-09-05 17:06:02 · 5 answers · asked by gatortheone 1