Mathematics - 15 July 2007

please show work.

*= 2

17x* + 85

2007-07-15 12:51:39 · 5 answers · asked by some guy 2

10-4 3/4=
can you show me the steps?

2007-07-15 12:35:13 · 5 answers · asked by chellalious 1

Given f(x)=3x^3-5x+1 Find the equations of the tangent and normal (Perpendicular) lines to the curve at x=2. Write your answer in slope--y-intercept form.

2007-07-15 12:30:49 · 3 answers · asked by Anonymous 1

An observer at the top of a 60 m lighthouse sights two boats approaching, one behind the other. The angles of depression of the boats are 38 degrees and 23 degrees. Find the distance between the boats to the nearest meter. Show all work to support your answer.

2007-07-15 12:30:44 · 3 answers · asked by dhd d 1

Need homework help:

lim(x->1) (1-x)/sqrt(12-3x)-3

lim(x->1) (x^3-1)/(x-1)

lim(x->0) (1-cosx)/(1+sinx)

lim (x->0) (1-cosx)/(sinx)

Don't have to do all of them, just please show me your steps.

2007-07-15 12:28:14 · 4 answers · asked by Anonymous 1

If x ^(2) - 3x -2 = 0,
then what is the value of 2x^(2) - 6x - 11 ?

a) -9 b) -7 c) 0 d) 7 e) 9

If (4x + 3y) / (16x^2 - 9y^2) = 10, what is the value of 4x - 3y ?

a) 0.01 b) 0.1 c) 1 d) 7 e) 10

plz show work or explain

2007-07-15 12:25:37 · 3 answers · asked by ? 2

find the margin of error for the 95% confidence interval used to estimate the population proportion,

2007-07-15 12:14:59 · 3 answers · asked by Susan 2

Ok. On this planet, you are either a rogger or a bogger. there is an 8% chance of you being a bogger. 7% of rogger have ears. 23% of boggers have ears. Given that you have an ear, what are the chances that you are a bogger????

2007-07-15 12:07:13 · 6 answers · asked by Anonymous

integral of x*(cos(x^2))^5

Can you show me how to do it?? or give me a clue?

Would that be easier to do with the method of integral by part? or tri-substitution?

2007-07-15 11:51:26 · 4 answers · asked by jessica y 1

its dimensions are 24.5 X 10.5 (inches)

please help!?

2007-07-15 11:43:27 · 5 answers · asked by trl. 5

2007-07-15 11:39:15 · 2 answers · asked by coleman57 1

(a) If G(x) = x/(1 + 2x), find G '(a).

and

Use it to find an equation of the tangent line to the curve y = x/(1 + 2x) at the point (-1/4, -1/2).

2007-07-15 11:23:13 · 4 answers · asked by Anonymous

2007-07-15 11:16:32 · 11 answers · asked by Robert 1

I tried so many times to work this probelm ou i still cant get this answer which is (-12/7, 6/35).

Find the solution to each symbol of equation by substitution.

4x+5y=-6
x-5/3y = -2

Your help would be appreciated thanks!

2007-07-15 11:04:25 · 7 answers · asked by caligurl 2

A surveyor was unable to directly measure the height of the mountain, so he set up his equipment at the base of the mountain at two different locations, A and B, 1500 meters apart from each other. He then measured the angle of elevation to the top of the mountain from each of these locations. The angle of elevation from point A is 20 degrees. The angle of elevation from point B is 32 degrees. Find the height of the mountain to the nearest meter.

2007-07-15 10:55:17 · 5 answers · asked by Anonymous

A rescue plane is flying over the open sea and sights a life raft. Find the angle of depression to the nearest degree if the sight distance from the plane to the life raft is approximately 6.8 km and is flying at an altitude of 2.9 km.

23 degrees
25 degrees
65 degrees
67 degrees

2007-07-15 10:54:41 · 1 answers · asked by Anonymous

A helicopter is flying over a lake and sights a boat at an angle of depression of 35 degrees. The water-surface distance from the helicopter to the boat is 2300 feet. Find the altitude of the helicopter to the nearest foot.

1610 ft
3285 ft
1319 ft
4010 ft

2007-07-15 10:53:17 · 2 answers · asked by Anonymous

This is kind of hard to explain without a picture but here goes...

Two poles measuring 3 feet and 6 feet stand vertically in a field. Wires are attached from the top of each pole to the bottom of the other. A third wire is then run vertically from teh meeting of the first two wires to the ground. What is the length of this wire?

It looks like it would be 2.5 feet. But I really have no idea how to figure this out.

I\
I \
6 I \
I \ I 3ft
I x\ I
I / x \ I
----------------------Not a great pic I know...It's pretty much two triangles....and i am trying to find out the length of the x line that connects the two. Any help would be appreciated...

2007-07-15 10:48:06 · 3 answers · asked by Erika H 5

Find f '(a).

f(x) = sqrt(8x+1)

Do you use the def. of a derivate to solve? I tried that but my answer wasnt right...

2007-07-15 10:43:31 · 10 answers · asked by Anonymous

Im learning how to graph and I was wondering if someone could show me how to solve this and what to do when Im graphing. Im not understanding it very much and the examples are not all that helpfull

Graph using the intercept method: x + 3y = 6

2007-07-15 10:08:02 · 3 answers · asked by trevor s 2

Combine like terms: 5w + 5x – 9w

A) w + x
B) 10w – 9x
C) –4w + 5x
D) wx

2007-07-15 10:06:45 · 10 answers · asked by Tainteddeceptions 3

Use the distributive property to remove the parentheses in the following expression. Then simplify your result if possible:

1/4(20+16)

2007-07-15 10:03:29 · 5 answers · asked by Tainteddeceptions 3

is that a derivative

2007-07-15 09:58:54 · 7 answers · asked by jake p 2

A coin is flipped repeatedly. One man bets that the sequence TT will come up first, the other bets on HT instead. Is there a difference in odds?

2007-07-15 09:13:16 · 8 answers · asked by Scythian1950 7

2007-07-15 09:01:20 · 7 answers · asked by Anonymous

1/x-1 - 2/x^2-1


(x+1)/x^2+2x+1


x^2+3x/x^2+2x-3 divide x/x+1

2007-07-15 08:49:14 · 7 answers · asked by callmejeseca 1

Write the following as an infinite geometric series, note any restrictions on "r".


f(x)=1/(1-x)

and

f(x)=1/(1-9x^2)

2007-07-15 08:46:33 · 2 answers · asked by Anonymous 1

1. (4x^2/3y^2) (2y^3/x^2)


2. (x^4/4y^3)(2y/x^3)^3


3. (x^3y^-2/x^-3y^2)^-1



4. 6x^3/y^2 divide 3xy/2

2007-07-15 08:45:50 · 5 answers · asked by callmejeseca 1

the temperature, T of a person during an illness is given by T(t) = -.1t^2 + 1.2t + 98; for 0 is less than or equal to t which is less than or equal to 12 where T is the temp, (F) at time t, in days, find the maximum value of the tempand when i occurs

i have no idea where to begin

2007-07-15 08:40:30 · 2 answers · asked by Anonymous

2007-07-15 08:39:59 · 5 answers · asked by Anonymous