1.) x2+y2=45,xy=18,then 1/x+1/y=? 2.)when a square is constructed on 3 sides of a triangle ,their sides are in the ratio 1:3:4,THE WAT triangle is...

We'll solve just the 1st problem since you have to ask
only one question.

To determine the sum of the fractions
we'll have to determine the least comon denominator, which is
xy.

1/x + 1/y = (y+x)/xy

We
already know the value of xy, which is 18. We'll calculate the value of x +
y.

For this reason, we'll have to create a perfect square
to the left side:

(x^2 + y^2 + 2xy) - 2xy =
45

(x+y)^2 = 45 + 2xy

x + y
=`+-` `sqrt(45+2*18)`

x + y =`+-`
`sqrt(81)`

x+  y = `+-` 9

Now,
we'll calculate the requested sum:

1/x + 1/y =
(y+x)/xy

Let x+y=9 => (y+x)/xy = 9/18 =
1/2

Let x+y=-9 => (y+x)/xy = -9/18 =
-1/2

The requested values of the sum 1/x +
1/y are {-1/2 ; 1/2}.

What does the stopping distance of a moving body depend on?

A body that is moving either at a constant speed or
otherwise can be brought to a stop by applying a force that accelerates the body in the
opposite direction of its present motion.

The acceleration
brings the body to a stop in a distance that can be calculated by the use of the
following formula: v^2 - u^2 = 2*a*s, where u is the initial velocity, a is the
acceleration of the body and s is the distance. As the body has to be brought to a stop,
v = 0. This gives the magnitude of displacement or distance as s =
u^2/2*a.

The stopping distance therefore depends on the
initial velocity of the body and its acceleration due to a force in the opposite
direction.

How does Dickens create suspense and foreshadowing in chapter 32 of Great Expectations?It's the chapter where Wemmick takes Pip to visit the prison...

Dickens gives us (and Pip for that matter) great hope in a
relationship between Pip and Estella. Pip receives a letter that says Estella is coming
to town and he is to meet her. This makes readers believe that for all this time while
we have watched Estella mock and abuse Pip, there just may be that glimmer of hope for
him with her. Now, it feels to the reader like a relationship for them is not only
possible but probable. While readers get anxious right along with Pip,
Dickens drives the story away from
Estella.

Wemmick comes along and takes Pip
to Newgate Prison. A prison is an ironic place to go considering what Estella's
treatment to Pip over the years has done. This negative experience might make readers
wonder, is this meeting between Pip and Estella going to be any different, or is Pip yet
again bound to the life from which he began. The prison experience is also a connection
to who he finds out is his benefactor as well as to what we learn about his connection
to a convict in the very beginning.

Finally, the chapter
ends with an ominous question:

readability="5">

What was the nameless shadow
which again in that one instant had
passed?

A shadow could be so
many things. It could refer to the past or the future. It could refer to a bad
experience. It is unnamed, so once again we are guessing. But, it is a clue and you will
be able to put it all together in the end!

Explain following line in Pope's "The Rape of the Lock". "This to disclose is all thy Gurdian can"Answer will be divided into three parts 1.Where...

The following line appears in Canto One of Pope's poem
"The Rape of the Lock":

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This to disclose is all thy Guardian
can.

The line is 113 and lies
as the second to last line in stanza 10. Canto One is the first canto of five from the
poem.

In Canto One, Pope introduces the Beautiful Belinda.
The Sun (a muse in the poem) has been evoked so as to provide the beginning of the day
(which the sun historically symbolizes). The people of the household, therefore, are
described as going about their typical morning
routine.

Readers learn of Belinda and her realtionship with
the Sylphs- they are her protectors- through a description of her dreams. Her main
protector, Ariel, tells her in her dream that the day will bring about "some dread
Event". After awaking from her dream, and the warning, Belinda proceeds to ready herself
for the day.

The line in question comes during Ariel's
warning to Belinda in her dream. After introducing himself as her protector, Ariel
states the following:

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E're to the Main this Morning Sun
descend.
But Heav'n reveals not what, or how, or where:
Warn'd by
thy Sylph, oh Pious Maid beware!
This to disclose is all
thy Guardian can.
Beware of all, but most beware of
Man!

Therefore, the line's
meaning falls in the fact that Ariel is warning Belinda about his knowledge that
something bad is going to happen. Although he does not know exactly what, "But Heav'n
reveals not what, or how, or where", Ariel knows that he must tell her everything that
he does know so as to warn her, "This to disclose is all thy Guardian
can."

The direct meaning of the line is Ariel telling
Belinda that, at this point, all he can do is tell her about the threat of danger- given
the threat is all he knows of.

“It was a pleasure to burn.” Why does Bradbury start Fahrenheit 451 in this way, as though it would be more pleasurable to burn books rather...

First of all, from a purely literary perspective, Ray
Bradbury chose to open the novel “Fahrenheit 451” with the words “It was a
pleasure to burn” to immediately capture the attention of the reader and draw
him or her into the story quickly. This is a short, compelling sentence that piques
one’s interest; the reader wants to know why it’s “…a pleasure to
burn” and subsequently delves into the story wholeheartedly. This is what
happened to me the first time I read this story.

Secondly,
Bradbury’s opening line causes the reader to gain a glimpse into the mindset of the
firemen, those who set fires by burning banned books and the homes that house them. This
simple sentence presents concisely and clearly how these firemen are thinking as they
wield their kerosene filled flame throwers as if they are the ultimate destructive
force. This sentence gives the reader a taste of evil actions and a peek into evil
thought processes.

The sentence is unassuming and
unadorned. However, it conveys an act of violence against a citizen that is anything but
unassuming and unadorned. This act of burning is representative of a totalitarian
government’s control of its citizens. The act of burning, conducted by the government
against its own, is a flamboyant display meant to discourage dissent from the
populace.

Ray Bradbury uses these six simple words to
reveal to the reader, right at the beginning of the novel, that the government is more
powerful and citizens oppose it at their peril. The burning of books, homes, and people
who refuse to leave their burning homes is definitely not unadorned drama. It is drama
manufactured by the government to make a point to its citizenry that it will not
tolerate books and that those who have and hide them, and then are found out, will pay
dearly.

Therefore, burning is theatre
created by the totalitarian government. The central characters on the stage are the
firemen who advance the aims of the government that pays them. The citizens desiring
books to read are the pawns in the game/story. The powers that be want to make the point
that it is a pleasure for the firemen and the totalitarian government to see that those
opposed to it are reduced to ashes. Nonetheless, the essence of the story is that there
is one firemen who has a conscience and who no longer finds it “…a pleasure to
burn.”

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function satisfies condition f(x+1/x)=x^2+1/x^2 . find function

Since the result of f(x+1/x) is a quadratic function, then
f(x) is a quadratic function, too.

If f(x) is a quadratic
function, we'll have:

f(x) = a`x^(2)` + bx +
c

We'll replace x by the sum x +
1/x

f(x + 1/x) = a`(x + 1/x)^(2)` + b(x + 1/x) +
c

We'll expand the square:

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

The function will
become:

f(x + 1/x) = a(`x^(2)` + 1/`x^(2)` + 2) + b(x +
1/x) + c

Since, from enunciation, we'll have f(x + 1/x) =
`x^(2)` + 1/`x^(2)` :

a(`x^(2)` + 1/`x^(2)` + 2) + b(x +
1/x) + c = `x^(2)` + 1/`x^(2)`

Comparing both sides, we'll
get:

a= 1

b =
0

c = -2

1*(`x^(2)` +
1/`x^(2)` + 2) + 0*(x + 1/x) - 2 = `x^(2)` +
1/`x^(2)`

`x^(2)` + 1/`x^(2)` + 2 - 2 = `x^(2)` +
1/`x^(2)`

Therefore, the requested function
f(x) is: f(x) = `x^(2)` - 2.

I would like an analysis of Emily Dickinson's poem "Again - his voice is at the door" in regards to the use of the color purple.

Many of Emily Dickinson's poems include a reference to the
color purple. A few of the poems are "There is a flower that bees prefer", "Wait Till
the Majesty of Death", and "We like March", "It will be Summer--Eventually" and "Me,
change! Me, alter!"

The use of the color purple is based
upon the meaning of the color. The color purple is known to represent good judgement,
spiritual fulfillment, and peace of mind.

In regards to the
poem "Again- his voice is at the door", the color purple appears in the following
stanza:

I'd
give—to live that hour—again—
The
purple—in my Vein—
But
He must count the
drops—himself—
My price
for every
stain!

What the
speaker is referring to, in this poem, is the wish to have blood running through her
veins again. It is apparent, through the previous movement of the poem, that the speaker
has passed on. In regards to this, she wishes that she may be able to spend time with
the one who has come to seek her out. Instead of continuing life, the speaker has come
upon Heaven. The man, whose voice is at the door, accompanies her only so far. She must
go on alone from the departure point. This is shown in the following
lines:

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Alone—if
Angels are "alone"—
First time they
try the
sky!
Alone—if those "veiled
faces"—be—
We cannot count—on
High!

Therefore, the color
purple, in the poem, represents spiritual fulfillment.