Wednesday

July 27, 2016
Total # Posts: 1,687

**calculus**

the line y=x-c touches the ellipse 9x^2 + 16y^2 = 144. Find the value of c and the coordinate of the point of contact. a parallelogram is defined by two sets of tangents to the curve x^2 - 4y^2 = 9. The gradients of the tangents are 1 and -1. Find the area of the parallelogram.
*June 28, 2008*

**calculus**

conic sections prove that the line x-2y+10=0 touches the ellipse 9x^2+64y^2=576 show that the equation of the normal to the ellipse x^2/a^2 + y^2/b^2 = 1 at the point (a cos theta, b sin theta ) is ax sin theta - by cos theta - (a^2-b^2) sin theta cos theta =0
*June 28, 2008*

**calculus**

if the tangent of two intersecting circles, at their points of intersection are perpendicular, the circles are said to be orthogonal. Show that the circles x^2+y^2-6x+4y+2=0 and x^2+y^2+8x+2y-22=0 are orthogonal. find the equation of the tangent to the ellipse x^2/a^2 + y^2/b^...
*June 28, 2008*

**calculus**

conic sections question 1: verify that the point (3,2) lies on the circle x^2+y^2-8x+2y+7=0, and find the equation of the tangent at this point. question 2: find the length of the tangents from the point (5,7) to the circle x^2+y^2-4x-6y+9=0 question 3: find the equation of ...
*June 28, 2008*

**calculus**

Conic sections A circle passes through points A(-5,2), B(-3,-4) and C(1,8). Find the coordinate of the point of intersection of the perpendicular bisectors of AB and BC. What is the equation of the circle?
*June 28, 2008*

**calculus**

what is the equation of the circle whose centre lies on the line x-2y+2=0 and which touches the positive axes.
*June 28, 2008*

**Calculus**

Conic Sections- A point moves so that its distance from the origin is twice its distance from the point (3,0). Show that the locus is a circle, and find its centre and radius.
*June 28, 2008*

**mathematics**

how do i factorize 25p^2-q^2
*June 20, 2008*

**maths**

mr allen has a wife and 3 kids,his salary for 2007 was 7500 per month He has a husband allowance of $10,000 a wife allowance $5000 each child allowance $2500 22% of the taxable income Taxable income =Annual Salary-Total allowances 1)Calculate Mr Allens income tax for 2007 2)...
*June 20, 2008*

**chemistry**

What is the effect of an insoluble impurity, such as sodium sulfate, on the observed melting point of a compound?
*June 12, 2008*

**Math**

name the 2 digit multiple of 8 who digits add up to 10
*June 10, 2008*

**American literature**

Which character is not tied to the plow
*June 3, 2008*

**Algebra**

there were 6 purple socks and 4 orange socks in a drawer. Zucky picked one sock without looking and then another without looking(or replacing the first). What is the probability that he picked 2 purple socks?
*June 2, 2008*

**Space**

Ugh...I put red giant on my final but everyone else put white dwarf. Can you tell me which is correct. Please and thanks. :) What is brighter a red giant or a white dwarf and why? Thanks <3
*May 30, 2008*

**math**

On a vacation in cananda steve used his credit card to buy a camera for Can $250.00 trinirose: What is the value of the camera in Ja $. a)I know the asnwer is $18,125 Ja dollars b)steve has a credit limit of Ja $30,000.00.After buying the camera,how many Canadian dollars does ...
*May 23, 2008*

**pharmacology**

Sodium Seconal capsules are labeled 100mg. How many will be administered if the order is for gr 1 1/2
*May 22, 2008*

**Science**

A----is a reptile named for sound it makes when threatened.
*May 20, 2008*

**Literature**

In To Kill a Mockingbird why does Helen Robinson fall down when Atticus drives up to her house?
*May 18, 2008*

**accounting 2**

Stower's Research issues bonds dated Jan.1,2005 that pay interest semiannually on June 30and Dec.31. The bonds have a $20,000 par value, an annual contract rate of 10% and mature in 10 years. For each of the following, determine the bonds price on Jan. 1, 2005 and prepare ...
*May 17, 2008*

**bones**

complete the following term using the definition.. Definition is : suture of a tendon Complete this term:teno_________
*May 16, 2008*

**English-Essay Writing**

make sure you have all you full stops commers etc good luck
*May 12, 2008*

**Physics**

What are the parts of the battery and the function for each?
*May 12, 2008*

**Physics**

How are series and parallel circuits wired?
*May 12, 2008*

**Calculus**

I have a problem about complex number. Let z=7e^(7*pi*i/4) . Write z, z^4, z^7, z^(-2) in the form a + b i I have no idea how to do it. Any hints will be appreciated.
*May 7, 2008*

**Chemistry -- to Dr.Bob**

because its a redox reaction. the number of electrons in the Fe2+ to Fe3+ half-equation must equal the number of electrons in the MnO4 to Mn2+ half-equation, which is 6. Thus you need to have 6 Fe2+ and 6 Fe3+ also. Balance each half-equation first, and then combine the 2. :)
*April 24, 2008*

**Chemistry -- to Dr.Bob**

put 6 before Fe2+ and Fe3+
*April 24, 2008*

**physics (making a yo-yo)**

I am required to make a yo-yo that will unwind at a slowest rate possible, without using friction as a factor. Will it help if I make it hollow, so it would have more rotational inertia? Any other ideas? Please help!!
*April 24, 2008*

**chemistry**

I have done a titration to find the vitamin c concentration in cabbage. This turned out to be 1.25x10^-4 moles per litre. However, I am required to find the concentration in mg/100g. Can I convert moles per litre to mg/100g or is there another way to calculate it. Please help!!
*April 24, 2008*

**AP HISTORY**

do you know anything about georgia washington?
*April 14, 2008*

**AP HISTORY**

why did they choose georgis washington to head the army in 1775?
*April 14, 2008*

**AP HISTORY**

what was the prinipal reasontaht the second continental congress selected georgia washington to head army in 1775?
*April 14, 2008*

**physics**

An ionized helium atom has a mass of 6.6*10^-27kg and a speed of 4.4*10^5 m/s. The atom moves perpendicular to a 0.75-T magnetic field on a circular path of radius 0.012m. Determine whether the charge of the ionized helium atom is +e or +2e. Can anyone please give me some ...
*April 1, 2008*

**physics**

An electron is moving through a magnetic field whose magnitude is 8.70*10^-4 T. The electron experiences only a magnetic force and has an acceleration of magnitude 3.50*10^14 m/s^2. At a certain instant, it has a speed of 6.80*10^6m/s. Determine the angle (less than 90degrees...
*April 1, 2008*

**R.E/history**

Why did the Romans invade Palestine in the time of Jesus?
*March 29, 2008*

**physics**

A gyroscope consists of a rotating uniform disk with a 60-cm radius, suitably mounted at one end of a 15-cm-long axle (of negligible mass) so that the gyroscope can spin and precess freely. Its spin rate is 1540-rev/min. What is the rate of precession if the axle is supported...
*March 26, 2008*

**english**

cause there's one driver? duh
*March 26, 2008*

**math...help me! this is hard!!!!**

you have three jugs and a river of water. The jugs are known to hold exactly 3, 7, and 10 liters. How can you use these jugs to measure exactly 5 liters of water?
*March 26, 2008*

**algebra 2**

log x= 2.4 i have tried but i just cant get it i missed class that day and my teacher wont explain.
*March 23, 2008*

**algerbra**

AN ORCHESTRA CONSISTS OF STRINGS INSTRAMENTS AND WIND INSTIMENTS IN A RATIO OF 9 TO 4. THERE ARE 91 STRINGS AND WIND INSTRUMENTS IN THE ORCHESTRA. hOW MANY STRING INSTRUMENTS ARE THERE? how many wind instruments? Use a system of equation to model each situation. solve by any ...
*March 17, 2008*

**Algebra Help Radical notation**

5^1/7 in radical notation
*March 15, 2008*

**brain teasers**

3 S to a T
*March 11, 2008*

**chemistry-check over work**

2C6H5Cl(chlorobenzene)+C2HOCl3(chloral)=C14H9Cl5(DDT)+H2O in a gov. lab 1142 g of chlorobenzene is reacted with 485 g of chloral. a). what mass of DDT is formed? 1166.179 g of C14H9Cl5 b). which reactant is limiting?C2HOCl3 which reactant is in excess?C6H5Cl c). what mass of ...
*March 7, 2008*

**algebra 1**

does any one know how to do pattern and algebra
*March 5, 2008*

**Algebra**

how do u factor out 2x^3 - 5x - 3
*March 3, 2008*

**Math-measurement**

What is the volume of the package?
*March 2, 2008*

**MATH**

4gal 5qt + 8gal 2qt
*March 1, 2008*

**Math**

The ratio of 7 dimes to 3 quarters= 70 and 75 common factor of 5. So I can divide both numbers by 5 to get a ratio that means exactly the same thing as 70 to 75. This ratio will be 14 to 15
*February 28, 2008*

**Math**

Rewrite the statement, using percent notation. Of 50 houses in a development, 20 are sold.
*February 28, 2008*

**Math**

Ok is this always how we find rhe rate of something
*February 28, 2008*

**Math**

Find the rate 392ft/ 8 sec
*February 28, 2008*

**math**

Thank you so much
*February 28, 2008*

**math**

Approximately 5 out of every 10 students at Kendra's college live on campus. The college has 5,000 students. How many of them live on campus? Set up a proportion.
*February 28, 2008*

**Chem**

yea i cant get the equation either and i was there
*February 27, 2008*

**Chem**

Calculate the mass of baking soda, NaHCO3, needed to neutralize 3.0mL of 3.0 M hydrochloric acid.
*February 27, 2008*

**trig**

transform the expression on left to one on right csc x-sin x to cot x cos x
*February 19, 2008*

**accounting**

identify three external users of accounting information and indicate two questions they might seek to answer through accounting information.
*February 15, 2008*

**Physics**

Ann is driving down a street at 58 km/h. Suddenly a child runs into the street. If it takes Ann .71 s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m. When I converted 58km/h I got 16.111 m/s but now I'm not ...
*February 11, 2008*

**stupid test online**

What is leryec unscrambled?
*February 6, 2008*

**pre-cal**

can anyone please explain to me how to simplify this exponential expression??I got no idea...THANKS A LOT! [(-8x^6)/(y^-6)]^2/3
*February 5, 2008*

**physics**

what is the final temperature when a 3.0 kg gold bar at 99 degrees is dropped into a .22 kg of water at 25 degrees
*February 5, 2008*

**Music**

So, I need zo post my question again... I have to write a report for school on the topic of film music. I want to show my class mates how different you feel when you see a movie scene with two different musics. So I was looking for two versions of a scene of any movie. One ...
*January 27, 2008*

**music**

Thanks SraJMcGin. Well I have been on your links. The first one istn't really what I am looking for. I mean I wanted to have the same scene with to different music versions. The secound is better. But the thing is that in that scene you only got the new music but all the ...
*January 26, 2008*

**music**

Well, yeah that's an option. The only problem is that I really don't live at all near a video rental shop. So that's a problem... Maybe someone else got an idea... But I'll see what I can do. Thanks for your suggestion.
*January 26, 2008*

**music**

Hey GuruBlue Well, I've been on the webside. But there are just film reviews and so you mean I should buy the two DVDs? Well actually I have been looking for a scene of a movie just with two different musics... I also like your idea, but have you maybe a link where I had ...
*January 26, 2008*

**music**

I have to write a report for school on the topic of film music. I want to show my class mates how different you feel when you see a movie scene with two different musics. So I was looking for two versions of a scene of any movie. One version should be with the 'real' ...
*January 26, 2008*

**music**

explain ternary form what have played/sound in this structure
*January 25, 2008*

**science**

ok thank you that makes sense.....but do you know how gene splicing, cloning or stem cells would help a patient
*January 24, 2008*

**time periods**

can someone help me connect thesetogether. Napoleon/Romanticism Industrial Revoluiton Nationalism Imperliasm WWI Russian Revolution/Communist Russsia WWII The Cold war I need to show some connections between the events
*January 20, 2008*

**HELP!!! I ALSO HAVE FINALS TOMMORROW!!!!!!!!!!!**

Importance of simile, metaphor, idioms, and tone in literature.
*January 16, 2008*

**Algebra**

I really ned help how do you solve these types of equations 3x^2-27=0 2t^2=100 -4y^2=36 x^2+25=25 please help me and tell me how you got it
*January 12, 2008*

**science**

no i did not titrate....but i guess you're right about #2 i wasnt sure what to write
*January 12, 2008*

**science**

ht tp :/ /i1. ti nypi c.c om/ 7yr papx.j pg I did this experiment about antacids and i have to write three validity issues i could've had. I have two but I need one more. 1. I should have done more trials for more accurate results 2. when i stirred the antacid and acid ...
*January 12, 2008*

**science**

but we werent given a list of ingredients (i did this in school and my teacher just handed the antacids labeled generic or brand name)
*January 11, 2008*

**science**

ht tp :/ /i1. ti nypi c.c om/ 7yr papx.j pg I did this experiment about antacids and my hyppothesis is that "If I use the generic antacid to create a neutralization reaction, it will have the same effectiveness of the name brand because...." I'm not sure to what ...
*January 11, 2008*

**history**

so he was using this violent propaganda to make the Austrian government seem horrible so Austrians would want to create union and support him?
*January 9, 2008*

**history**

what does" Hitler began a violent propaganda campaign by press, radio, and platform against alleged misdeeds of the Austrian government" mean? why was Hitler using propaganda for in this context? was he try to expose a bad Austrian government?
*January 9, 2008*

**history**

so because all of this was done did this create tension? Your explanation is clear but I really don't understand how this was one part of leading to world war II?
*January 9, 2008*

**Social Studies**

What are the main landforms in New England and the bodies of water that surround and run through New England?
*January 8, 2008*

**5th grade writing assignment**

I need some ideas on a story about a Christmas Tree. A short and simple idea would be great!
*January 8, 2008*

**english**

can someone just give me straightforward answers to help me study for my test tomorrow? when we say "Shakespeare's time" what years is this referring to...what centuries? Why was theatre important during Shakespeare's time?
*January 7, 2008*

**Calculus**

Is thsi a solution of an ordered pair (4, -1) 4x = -17 - y 2x = -12 -4y I say yes ? Is this how you do it. 4(4) = -17 - -1 = 2(4) = -12 - 4(-1)
*January 7, 2008*

**Calculus**

Thanks looks like I forgot to subtract 8
*January 7, 2008*

**Calculus**

f(x) = x^2 - 8x - 17 at x = 4 I came up with 8 ?
*January 7, 2008*

**Calculus**

Find the derivative of f 0f x. f(x) = x^2 - 8x - 17 at x = 4
*January 7, 2008*

**Calculus**

Complete the identify sin(a + b)cos b - cos(a + b)sin b
*January 7, 2008*

**Science**

If the continents were drawn on a Mercator map, would your chances of finding a fit have been improved? Explain.
*January 6, 2008*

**math**

If p,r, and s are three different prime numbers greater than 2 and n = p*r*s, how many positive factors, including 1 and n, does n have?
*January 6, 2008*

**science**

Relate progressing fossil evidence, changing habitats and climates to multiple adaptations and thus lifestyle changes. My first example is bipedalism but would another one be that sinc the earth got colder intelligence increased which caused humans to learn how to mke tools ...
*January 3, 2008*

**french**

how do you know when the object is direct or indirect.... do indirect objects usually have an "a" (with accent to the left) and direct objects use "les"?
*December 20, 2007*

**Calculus**

The derivative of f of x f(x) = x^3 + 19 ; x = 8
*December 18, 2007*

**Calculus**

Find the slope of the tangent line to the graph of f at any given point f(x) = -2x + 6 at (2,2)
*December 18, 2007*

**WWII**

//wiki.answers. com/Q /Wh lied_c ount ries _in _World_War_2 U.S., Great Britain (UK), Russia, Canada, China, Australia, France, were major Allies. There were many more, including New Zealand India Belgium (May 10 1940-invaded) Brazil Greece (October 28 1940invaded) Holland (...
*December 17, 2007*

**science**

i do not understand this question and how to anseer it, can someone please help? htt p://i12. tinypic. com/6k8ytdd.jpg the question is in the link because it has a graph that goes along with it that I do not understand, just take the spaces out of the link. but the question ...
*December 17, 2007*

**science**

the question is in the link because it has a graph that goes along with it that I do not understand, just take the spaces out of the link. but the question is: Come up with a evolution scenario involving natural selection for the graph. I do not understand the trend in the ...
*December 17, 2007*

**science**

i do not understand this question and how to anseer it, can someone please help? htt p://i12. tinypic. com/6k8ytdd.jpg
*December 17, 2007*

**Calculus**

A piecewise function is given. Use the function to find the indicated limits, or state that a limit does not exist. (a) lim is over x-->d – f(x), (b) lim is over x-->d + f(x), and (c) lim is over x-->d f(x) x^2 - 5 if x < 0 f(x)= -2 if x ->0 ; d = -3 1. (a...
*December 14, 2007*

**english**

how do each protagonist from one flew over the cuckoos nest,stranger in a strange land and catcher in the rye handle costom rules,behaviors of their respective societies
*December 14, 2007*

**calculus**

A piecewise function is given. Use the function to find the indicated limits, or state that a limit does not exist. (a) lim is over x-->d – f(x), (b) lim is over x-->d + f(x), and (c) lim is over x-->d f(x) x^2 - 5 if x < 0 f(x)= -2 if x ->0 ; d = -3 1. (a...
*December 13, 2007*

**Calculus**

How many 2-digit numbers can be formed using the digits 1,2,3,4,5,6,7,8,9 and 0? No digit can be used more than once
*December 10, 2007*

**english/history**

could an example for the question i asked be superman comic strips (saving lois lane, etc)?
*December 9, 2007*