Sunday

February 19, 2017
Total # Posts: 1,136

**Algebra**

m=8/9,(6,-4) I can get to the last step but my answer is always wrong what am i doing wrong

*December 6, 2009*

**physics**

The New River Gorge bridge in West Virginia is a 518 m long steel arch. How much will its length change between temperature extremes -19°C and 39°C? (answer in cm)

*November 30, 2009*

**music appreation**

Writing Assignment: What musical form preceded the sonata allegro form? This form is often considered dramatic and rewarding. In what way is this so and why? Refer to the listening examples to help make your point.

*November 20, 2009*

**science help plzzz**

how is building a skyscraper today simular to and different from the building of the pyramids

*November 19, 2009*

**science**

how is building a skyscraper today simular to and different from the building of the pyramids(anykind of pyrsmids) Thnx

*November 19, 2009*

**antoyms**

i cant figure them out in my head its hard plz help mee

*November 18, 2009*

**antonyms**

and the others cuz there hard 4 me

*November 18, 2009*

**antonyms**

my LA teacher gave me a sheet and it says complete the missin vowels Ex:htcld is hot/cold and I need help with some that are nncntglty,smthrh,gvtk,ltrght,pdwn,nt,srswt,tthn,nddrvr,ststnd,ldyng,crkdstrght,glybtl,lvht that's it!

*November 18, 2009*

**Chemistry**

Elemental calcium is produced by the electrolysis of molen CaCl2. What mass of calcium can be produced by this process if a current of 8500 A is applied for 39 h? Assume that the electrolytic cell is 65% efficient. I found the mass to equal 1.6 x10^5g Ca, and that is correct. ...

*November 18, 2009*

**Chemistry**

This was for online homework that was due tonight, and the answer is .43 kWh, but I'd still like to know how to get this answer. Thank you!!

*November 15, 2009*

**Chemistry**

Elemental calcium is produced by the electrolysis of molen CaCl2. What mass of calcium can be produced by this process if a current of 8500 A is applied for 39 h? Assume that the electrolytic cell is 65% efficient. I found the mass to equal 1.6 x10^5g Ca, and that is correct. ...

*November 15, 2009*

**science**

how much power, in watts, is needed to cut a lawn in 50 min if the work ivolvled is 100,000 j

*November 15, 2009*

**science**

Is holding a book while walking work? Why or why not ok

*November 12, 2009*

**science**

is holding a book while walking work? why or why not that is the question

*November 12, 2009*

**science**

is holding a book while walking work? why or why not

*November 12, 2009*

**Chemistry**

that doesn't make sense to me... can you give me a step by step walk through?

*November 9, 2009*

**Chemistry**

How many liters of hydrogen at STP can be produced by the reaction of 4.15 g of zinc with hydrochloric acid: Zn + 2HCl -> ZnCl2 + H2

*November 9, 2009*

**algebra**

ohhh i get it thanks!

*November 4, 2009*

**algebra**

i don't get it :( at all

*November 4, 2009*

**algebra**

can someone please tell me how to solve these, thanks! 1.2(3b-4)=8b-11 2.5(r-1)=2(r-4)-6 3.2y+3=3(y+7) 4.15x-10=-9x+2

*November 4, 2009*

**human resources**

What are the pros and cons of having a more diverse workforce? Is the United States in a better position to compete globally because of its diverse population

*November 2, 2009*

**algebra**

I do not entirely know why, but yes, it does happen with equations.

*October 21, 2009*

**chemistry**

They all have the same number (seven).

*October 21, 2009*

**chemistry**

122.66 mL (Height times area of the circle -- 12.5*1.25^2 -- 1.25 is the radius).

*October 21, 2009*

**Geometry**

Can I get help starting this exercise:- Let triangle ABC be such that AB is not congruent to AC. Let D be the point of intersection of the bisector of angle A and the perpendicular bisector of side BC. Let E, F, and G be the feet of the perpendicular dropped from D to line AB...

*October 20, 2009*

**Math**

I am a parent of a 10 year old, 5th grader and my hubby and I just can't figure these out to help her. Anyone?? Thanks in advance. 27 = 8k divide k = ?? 5a - 3a = 18 a = ?? 12r - 4r = 48 r = ?? g = 7(10-3) g = ?? These are finding the unknown number in each equation. ...

*October 18, 2009*

**Math**

Two students are talking after school: What is the average of your grades in Math for September? 4.6 That is impossible since the year just started. You could not possiblly have that many grades. What was the doubting student thinking of of the possible grades teachers give ...

*October 15, 2009*

**Math**

Many tires come with 13/32 inch of tread. The first 2/32 inch wears off quickly(say during the first 1000miles). From then on the tire wears uniformly. A tire is considerd "worn out" when on 2/32 inch of tread is left. a. how many 32nds of an inch of usuable tread ...

*October 13, 2009*

**algebra**

what are the three rules for expontents?

*October 13, 2009*

**Science**

14 letter word for "scientists do their experiments more than once so they can reduce the effects of chance errors. This is called conducting _________

*October 12, 2009*

**3rd grade Math**

Writing in Math - How can estimating help you add two-digit numbers?

*October 12, 2009*

**physics**

A small boat is headed a harbor 32km directly northwest of its current position when its suddenly engulfed in heavy fog. The captain maintain a compass bearing of northwest and a speed of 10km/h relative to the water.The fog lift 3.o h later and the captain notes that he is ...

*October 8, 2009*

**3rd grade Math**

Representations - Draw a number line. Make sure the following numbers are on your number line: 1,472; 1,560; 1,481. Are we over thinking this problem? Are they just looking for a number line with the above number listed from least to greatest?

*October 1, 2009*

**french**

how do you unscramble laigerne?

*September 23, 2009*

**algebra**

thank you, i also fixed the spelling!

*September 22, 2009*

**algerbra**

the problem is x+6-2x+9, how would i go about solving it a simpiler expression would be greatly apprciated1 the x's get me confused

*September 22, 2009*

**socials**

ok sorry about that i was just kinda annoyed

*September 22, 2009*

**socials**

i have one algerbra ? below

*September 22, 2009*

**socials**

not to be rude but this sara girl has gotten help on like 3 ? now and i'm waiting for someone to help me with mine i don't have all day to wait while this girl gets all her homework done

*September 22, 2009*

**algerbra**

i have to simply the expression 3x squared-10+4x+8-x squared, so far i have this 1x squared+4x-2 3x squared-1xsqaured+4x -10+8 2x squared+4x-2 i know its kinda confusing becasue i type sqaured so many time, am i on the right track?how do i find the answer now? i'm so ...

*September 22, 2009*

**pre-calculus**

An open box is to be made from a flat piece of material 18 inches long and 5 inches wide by cutting equal squares of length xfrom the corners and folding up the sides. Write the volume Vof the box as a function of x. Leave it as a product of factors, do not multiply out the ...

*September 18, 2009*

**English**

WHat is the climax of The Seems: the Glitch in Sleep?

*September 14, 2009*

**anatomy/biology**

what substance passes through a cell membrane using a solute pump?

*September 10, 2009*

**gen 300**

I think Ms. Sue is right to say what she said. The information he posted says that time management is an example of something he could use. Obviously, he has a problem managing his time or he wouldn't be looking for his answers online... or he has a problem concentrating, ...

*August 24, 2009*

**algebra**

(x+5)over 6= 1- (x+5) over 7 (x+5)/6= 1- (X+5)/7 I know you have to get a CD of 42 but I can't get the write answer.

*August 4, 2009*

**axia**

explain the difference account payable and trade credit

*July 15, 2009*

**HCA270**

how can using a bank cash management service reduce opportunity cost for a healthcare organization?

*July 13, 2009*

**12th grade - English (World Mythology)**

The website is: zarathushtra . com /z/gatha/dji/forward . htm What is Tagore’s main argument? Find a sentence or two that make up Tagore’s thesis statement and cite it here. What distinction does Tagore make between “blind obedience” and “the path of ...

*June 16, 2009*

**General Chemistry**

Thanks! I actually eventually got the right answer after about 45 gruelling minutes. But, mine is different than yours 3H2O + C2H5OH + %I3- ==> 15I- + CO2 + CHO2- + 11H+

*June 3, 2009*

**General Chemistry**

Im having trouble balancing this redox rection in acidic solution. I don't know how to balance reactions in which one reactant splits up into two products. C2H5OH(aq) + I3-(aq) --> I-(aq) + CO2(g) + CHO2-(aq) + H+(aq) I know I split it into C2H5OH --> CO2 + CHO2 + H...

*June 3, 2009*

**chemistry**

Thanks. I also have a similar question about cis and trans isomers.why is the heat of formation lower for a trans isomer? the only thing i could think of is that the dipole moment is 0.But does this have anything to do with the heats of formation?

*May 30, 2009*

**chemistry**

Why is there a difference in the heats of formation of CF4 and CCl4? I know that the bond length of CCl4(C--Cl) is longer than that of CF4(C--F), does this affect the heat of formation. Heat of formation are -225.709kcal/mol(CF4) and -28.120kcal/mol(CCl4).

*May 30, 2009*

**Chemistry**

If 0.110 mol of liquid H2O and 40.5 g of solid Al2S3 are reacted stoichiometrically according to the balanced equation, how many moles of solid Al(OH)3 are produced?

*May 21, 2009*

**Chemistry**

Thanks, i figured it out using the mol ratios of NaBr and Cl2.

*May 21, 2009*

**Chemistry**

If 0.720 mol of gaseous Cl2 and 390 mL of 0.641 M aqueous NaBr are reacted stoichiometrically according to the balanced equation, how many moles of gaseous Cl2 remain? Round your answer to 3 significant figures. 2NaBr(aq) + Cl2(g) → 2NaCl(aq) + Br2(l)

*May 21, 2009*

**mangerial econ**

The MorTex Company assembles garments entirely by hand even though a textile machine exists which can assemble garments faster than a human can. Workers cost $50 per day, and each additional laborer can produce 200 more units per day (the same for each additional worker). ...

*May 20, 2009*

**6th grade english**

thank u

*May 19, 2009*

**6th grade english**

What is another name for myth

*May 19, 2009*

**Math**

Thank you!

*May 11, 2009*

**Math**

I am working on 5th grade math...can you help with the following question? In a roll of 50 dimes, 8 were minted before 1983. What percent of the dimes in the roll were minted before 1983?

*May 11, 2009*

**Chemistry**

A weather ballon is prepared to lift off at the North Pole. The balloon is filled with 15000 L of helium gas. The conditions at the launch site are 760 mm Hg and 0 degrees celsius. The balloon is then released and rises to a height of 20,000 m. The atmospheric pressure ...

*May 2, 2009*

**Finance**

Dean and Jerry formed a partnership, agreeing to share profits and losses equally. Dean will receive a guaranteed payment of $48,000 per year. The partnership has $240,000 net income from operations for the year, before considering the guaranteed payment. What is Dean's ...

*April 20, 2009*

**health care assignment help**

Can you view a word document? I want to have my introduction paragraph checked.

*April 17, 2009*

**PSY**

How can masculine and feminine traits be described using the contimuum masculinity-femininity?

*April 16, 2009*

**7th grade algebra**

-3.5(2-3n)-2.5n

*April 14, 2009*

**Economics**

Depression

*April 14, 2009*

**Math**

if (a,b)=1 and a b=c^n, show that a and b are nth powers

*April 8, 2009*

**physics**

a 0.40kg ball is thrown vertically upward with a speed of 30m/s. The ball reaches a height of 40m. What is the energy dissipated due to air friction?... please help i don't know what to do:(

*April 7, 2009*

**Psychology**

Best way to describe biopsychology and its theoretical framework. Thanks

*April 7, 2009*

**health**

2000 word full sentence research paper on Autism controversies example.( mercury and vaccinations) an introduction and a thesis statement.A body of supporting evidence and in-text citations, a conclusion, a reference list at least 5 -7 sources. Does this help?

*April 1, 2009*

**Math**

A random variable X has a cumulative distribution fnc given by 0 for a<0 G(a)={a^2 for 0<=a<1 1 for a>=1 find the probability density function.

*March 25, 2009*

**Data Management**

Find the variance if X~N(0.02) and 95% of the data lies between -7 and 7.

*March 24, 2009*

**History**

What distinguishes an American from a European according to Hector St. John Crevecoeur? Why?

*March 18, 2009*

**Math 115**

If $9,000.00 is deposited into an account paying 4% interest compounded annually (at the end of each year), how much money is in the account after 5 years? (Round to the nearest cent.)

*March 14, 2009*

**Math**

how do you find relative error?

*February 28, 2009*

**Math**

Ryan estimates the measurement of the volume of a popcorn container to be 282 cubic inches. The actual volume of the popcorn container is 289 cubic inches. What is the relative error of ryan's measurement to the nearest thousandth?

*February 28, 2009*

**physics**

If a hair dryer is rated at 800W, how much energy does it require in 3 min?

*February 18, 2009*

**physics**

If an 80kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average power is generated?

*February 18, 2009*

**physics**

A 40 N block lifted straight upward by a hand applying a force of 40 N has an initial kinetic energy of 12J. If the block is lifted 0.5 m, how mauch work does the hand do? What is the block's final kinetic energy?

*February 18, 2009*

**Psychology**

What is the difference between absolute continuity and differential continuity? Search does not help as it deals with math not the psychology side. Thanks

*February 8, 2009*

**psychology**

What is the difference between absolute continuity and differential continuity?

*February 8, 2009*

**Math**

After a cyclist has travelled 2/3 of her route, she gets a flat tire.Finishing the trip on foot, she spends twics as long walking as riding.How many times faster does she ride than walk? I got 4 times faster is that right?

*February 5, 2009*

**MATH**

if you look at a normal line equation it is y=mx+b the m is the slope/constant/first difference whatever you would like to call it. The b is the y intercept(where the line crosses the y axis). Therefore in your question 3x=2y+14 the slope (m) is 2 and the y intercept (b) is 14.

*February 4, 2009*

**9th grade**

They are both the same. If you look at a line equation, y=mx+b the rate of change and slope is the m. If you are looking at a graph then to find the slope/rate of change you choos two points usually one after another and then see how many places horizontally (run) over to the ...

*February 3, 2009*

**Probability**

A random variable N has a cumulative distribution function given by F(x)={ 0 for x<1 0.2 for 1<=x<2 0.5 for 2<=x<3 0.8 for 3<=x<4 1 for 4<=x Find the mean of N.

*February 1, 2009*

**Probability**

A random variable N has a cumulative distribution function given by F(x)={ 0 for x<1 0.2 for 1<=x<2 0.5 for 2<=x<3 0.8 for 3<=x<4 1 for 4<=x Find the mean of N.

*February 1, 2009*

**math**

how do we find the least residue of 1789 (mod 4), (mod 10), (mod 101)

*February 1, 2009*

**PLZZZ I NEED HELPP**

can I please have some1 help me with this problem

*February 1, 2009*

**Probability**

A random variable N has a cumulative distribution function given by F(x)={ 0 for x<1 0.2 for 1<=x<2 0.5 for 2<=x<3 0.8 for 3<=x<4 1 for 4<=x Find the mean of N.

*February 1, 2009*

**Probability**

There are three investment plans for your consideration. Each plan calls for an investment of $25,000 and the return will be one year later. Plan A will return $27,500. Plan B will return $27,000 or $28,000 with probabilities of 0.4 and 0.6, respectively. Plan C will return $...

*February 1, 2009*

**Algebra**

The keyword is "wins" so it's a positive number. The answer is 500 or +500

*February 1, 2009*

**Biology!!! HELP**

Does anyone understand what "reciprocal genetic exchange" is? Is it just crossing over during prophase in meiosis?

*January 31, 2009*

**math**

(x+20) + (x-30) + 3x = 180 Then solve for X

*January 31, 2009*

**Caplan**

A virus-scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files

*January 29, 2009*

**medicine**

Thanks so much. Almost everything I need to answer is in that article. Thanks again.

*January 28, 2009*

**medicine**

Does the AMA ethics poinion mention encryption as a technique for security?

*January 28, 2009*

**math**

find all positive integers for 15x+18y=17.

*January 28, 2009*

**math**

find the 5 diff. ways a collection of 100 coins-pennies, dimes, and quarters- can be worth exactly worth $4.99.

*January 27, 2009*

**physics**

nvm i did bad arithmetic... stupid mistake thank you

*January 27, 2009*

**physics**

it seems i got it incorrect i had put 47.44722

*January 27, 2009*