Sunday

March 1, 2015

March 1, 2015

Total # Posts: 1,245

**differentiation**

by determining : lim f(x+h)-f(x) h->0 --------------- h show that if f(x)=2x^2+2 then dy/dx=4x. i figured out that f'(x) is 4x...but i am confused about what to do next...someone help? "i figured out that f'(x) is 4x..." That's the answer! dy/dx is ...
*May 25, 2007*

**function**

consider the function g(x)=x^3+5x^2-4x+4.determine: 1)g(37) 2)the value of x between zero and a hundred such that g(x)=145456 how do i do this? 1) put in 37 for x, and compute. 2) put in 145456 in for g(x), and solve for x. for the first one, just substitute 37 for x and ...
*May 25, 2007*

**maths please check**

a yacht is sailing at a speed of 12 knots due south in calm water. if the tacht encounters a current of 4 knots from bearing 040 degrees: determine the resultant speed and direction of the yacht. here is my answers: 15.28 knots from bearing 9.69 degrees.am i right? thanks. ...
*May 25, 2007*

**maths**

how do i find out the the equation of the line of symmetry for f(x)=ax^2+bx+c ? please explain it do me thanks! The line of symmetry runs through the vertex. so the x of the vertex is -b/(2a) and the equation of the line of symmetry is x = -b/(2a) e.g. for f(x) = 2x^2 - 12x + ...
*May 25, 2007*

**parabolas**

how do i find the equaion of the following parabolas? 1)intercepts at (2,0),(8,0) and (0,48) 2)turning point at (1,-2) and passing through the origin. can someone please teach me how to do this??thanks! The first: Write you standard equation of a parabola (it has two x ...
*May 20, 2007*

**maths**

f(x)=x^3+px^2+qx+6 this formula can also be written in "factorised form" that is, f(x)=a(x+b)(x+c)(x+d) can someone please teach me how to change a funtion into it's factorised form? thanks the following link has some nice step-by-steps illustrations and examples...
*May 18, 2007*

**intro cal**

the first 3 term of a geometric progression are k-4, 2k-4, 4k+4. what is the value of k? can someone help please! in any geometric progression any term divided by its previous term gives you the common ratio, so .... (2k-4)/(k-4) = (4k+4)/(2k-4) cross-multiply and proceed. I ...
*May 18, 2007*

**physics**

in different parts of a car air conditioner a liquid changes to a gas and a gas changes to a liquid. a)which of these changes causes the cooling?why? b)describe how the air conditioner removes heat from the car's cabin. can someone please help??thank you so much! it takes ...
*May 14, 2007*

**physics**

at a picnic a frind asks you for advice about cooling his warm bottle of soft drink.he can submerge the bottle in a bucket of water, or wrap the bottle in a cloth and then wet it with the water from the bucket.which should he do? i think the first option is right. but i can&#...
*May 14, 2007*

**physics-please check**

is this right?: when a form of energy changes from one form to another some energy may transfrm into a useful form, those useful form of energy is high grade energy.while the rest of the energy will always change to form we cannot use.which is called the low grade energy. if i...
*May 14, 2007*

**physics-energy conservation**

a mordern power station,or, more correctly, an energy station, converts heat energy into electrical energy at an efficiency od 50% if the station produces electrical energy at a rate of 1.00GW from burning coal, calculate the mass of coal it burns each day. the coal it uses ...
*May 9, 2007*

**physics**

jack measured that his racquet gives a squash ball 45.0J of kinetic energy when he hits it with a particilar shot.he also measures that it has 18.0J of kinetic energy after one bounce off the court wall. what percentage of its mechanical energy does the ball lose while it ...
*May 8, 2007*

**physics**

when a power station converts chemical or nuclear energy to electrical energy it converts about 50% of the energy to low grade heat suggest how people could use this energy before the power station operators allow it to enter the environment. why is this low grade heat energy ...
*May 8, 2007*

**physics-energy conservation**

some people refer to heat as "low grade energy. a)how is low grade energy different from high grade energy? b)give two example of high grade energy When heating a cup of tea, which would be preferable...a stove with a burner on top, or a heating pad? High grade energy is ...
*May 8, 2007*

**physics-energy conservation**

when you apply the brakes of a car its kinetic energy or energy of motion decreases. a)to what form of energy is the kinetic energy converted? b)where does the resulting energy end up? Do the brake drums on the wheels heat up? so does it convert into heat energy?and the ...
*May 8, 2007*

**Science**

Give examples of parasitism, mutualism and commensalism.
*May 6, 2007*

**physics**

why does an heater with a fan is more efficient than a similar heater that doesn't have a fan? It distributes the heat throughout the space (room) that is being heated.
*May 4, 2007*

**physics-heat transfer**

energy conscious homeowners often insulate their homes. one form of insulation is thick pads of loosely packed glass fibres.explain how these pads reduce heat transfer. how do thick curtains help reduce heat loss from the windows of a house? builders often insulate parts of ...
*May 4, 2007*

**physics-heat transfer**

consider a brick wall that has been exposed to the sun for some time. 1.how did the heat get from the sun's surface to the wall?(is it something about radiation?please help.) 2.the air over the wall seems to shimmer and shake as air currents rise from it.explain what ...
*May 4, 2007*

**Biology**

How is the eartworm's digestive system adapted for extracting relatively smal amounts of food from large amounts of ingested soil http://www.google.com/search?hl=en&as_qdr=all&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=+%22earthworm%27s+digestive+system+%22&spell=1
*April 22, 2007*

**Math**

You can write the equation y=x+4 in different ways. Which of these is correct ? x+y=4 x=4+y y-x=4 y+4=x x=y-4 There could be a couple of ways ... Please help I do not have a clue on this. I will be very greatful if you could help in the next 30 mins xxxx why don't you pick...
*April 18, 2007*

**MATH**

X=0
*March 21, 2007*

**post World War II**

Discuss the effets of World War II; historians and other scholars have commonly spoken of "postwar American society." How was society diffrent after the war that before? Were there changes all direct or indirect results of the war, or would many have occurred without...
*February 22, 2007*

**Bible - Amos**

Hi, I'm in a social studies class and we're studying the Bible, which I have trouble comprehending. I need to write on why Amos chose to single out the "cows of Bashan" as his scorn subjects. Would this be because women appeared to be the main cause of ...
*February 10, 2007*

**Oedipus**

Hi! I have a paper on Oedipus as a character of "appalling greatness." Is this how the audience for which Sophocles wrote the play would see him, or is it a "modern misinterpretation?" and This critic has argued "Oedipus" has the most impact of ...
*February 10, 2007*

**egypt mummification**

Thanks for the answers they worked out perfectly
*February 8, 2007*

**egypt mummification**

Holy effin crap that is the excact friggin paper im workinon! seriously u copied it down word for word! and it is called the mummification process. mine has a stupid work puzzle at the bottom!!!!!!! im in new york ya im in sixth grade 2!!! :)
*February 8, 2007*

**precalc**

If g(x = log subscript 7 x then what is the value of g(1/49)? I believe it's 1/2 but I'm not sure. no recall that log 1/49 (base7) = log 1 - log 49 = 0 - 2 =-2
*January 13, 2007*

**pre calculus**

I believe that the domain for f(x) = log subscript 3 (1-x) is x is a real number I think the range for the same equation is y > 1 . the domain of log (1-x) would be such that 1-x > 0 -x>-1 x < 1 whereas the range would be y is any real number Have you considered ...
*January 13, 2007*

**pre-calculus**

I posted a problem earlier and made a mistake the question is what is the domain and range of f(x)= log subscript 3 (1-x)? Sorry! The answer is the same. The domain and range will be the same as if it were log base 40.
*January 13, 2007*

**pre-calculus**

What is the base of the function F(x) = b to the power of x if the graph has points of (1/3, 2)and another off the subject one if g(x)= log 7 x what is g(1/49)? If F(x) = 2 when x = 1/3, and if the fucntio is of the form F(x) = b^x, then 2 = b^(1/3) Cube both sides of the ...
*January 13, 2007*

**pre-calculus**

What is the domain and range of log3 (1-x)? I will be happy to critique your thinking. To assist you, consider log (-4) log (0) log 25 Those are to the base 10, changing to another base just changes the numbers, not the function.
*January 13, 2007*

**Geography**

what is the clue to the word going down it dunt make sense t meeh x Its the same as ur al on bwt x
*January 2, 2007*

**english**

"Injustice anywhere is a threat to justice everywhere" what does this mean? Someone explain it plz. I think it means that if there is no justice or no fairness in a certain place, makes others think that doing the same thing is okay. thanx.
*December 14, 2006*

**the big idea of energy**

it is what goes through a food chain
*December 5, 2006*

**Watershed?**

Seriously, I thought they were supposed to give us a link to this info? FLVS is so lame.
*November 1, 2006*

**history**

How did Jeffersonian Democracy hope to remove obstacles to upward social mobility? How is it different from Jacksonian Democracy? Jeffersonian Democracy: http://en.wikipedia.org/wiki/Jeffersonian_democracy and http://www.answers.com/topic/jeffersonian-democracy Jacksonian ...
*October 7, 2006*

**sci**

would you consider an animal, like lion on top of the food chain, or the very bottom? ya never know what's out there... but ya, personally i'd consider lions at the top of the food chain. The food chain is determined by who eats whom. At the top of the food chain, that...
*October 4, 2006*

**sci**

would you consider an animal, like lion on top of the food chain, or the very bottom? on the top... Lion------>Zebra----->Grass
*October 4, 2006*

**english- mood/tone**

i like amys answer
*September 24, 2006*

**pronouns/nouns**

What is the nouns in this sentences "Mercury is the planet nearest the sun"
*September 5, 2006*

**making dot arrays**

what do you call them?
*August 21, 2006*

**eth 125**

Hey thanks for the help!!! I just stumbled upon this site by accident!!! I see a lot of my classmates fond it also
*July 20, 2006*

**NVQ level 3 buisness admin**

ok im really struggling on the questions on unit 314 hy the hell is there no question marks i have to anwser them like questions,its confusing me?? please can anyone shed a light over my way please.x cheers ema We don't have access to NVQ questions. Please post one or two ...
*June 12, 2006*

**unscrambling word**

Can you help me unscramble these words please! radmordey conshorier trinabac mecal minglem bobing lukarak its in spanish- srecmoro, and tsmnoamo- help please england antelope is the answer tyler! lafrpty=flytrap lafrpty=flytrap please help me to unscramble this saying! dare to...
*June 14, 2005*

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