Tuesday

November 25, 2014

November 25, 2014

Total # Posts: 1,711

**algebra need help**

Evaluate each expression. 3x^2-2x+1 if x=5 3a^2b^3 if a=2, b=-3
*February 8, 2009*

**algebra**

1. a number increased by 21 is 28. find the number 2. a number decreased by 12 is equal to 30. find the number. 3. 8 less than a number is 15. fid the number
*February 7, 2009*

**science**

what substance do you use to grow a virus in a lab
*February 7, 2009*

**chemistry**

they are not i have no idea where to start.
*February 6, 2009*

**chemistry**

Balance the following equations? Fe2O3 + 3H2 → 2Fe + 3H2O 4NH3 + 5O2 → 4NO + 6H2O 2Al + 6HAsO3 → 3H2 + 2Al(AsO3)3
*February 6, 2009*

**stats**

How would r change if researchers had recordered the proportions?
*February 6, 2009*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the...
*February 5, 2009*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the...
*February 5, 2009*

**English**

Mark Twain's skill as a humorist shows in Chapter XI. He uses a play on words in this chapter. What is it?
*February 4, 2009*

**chemistry**

Solid silicon and solid magnesium chloride forms when silison tetrachloride gas reacts with magnesium metal. Write a word equations and an ublanced formula equation. Include all of the appropriate notations.
*February 4, 2009*

**algebra help**

x^2+6x+5/x^2+8x+15 for what values is # underfined.
*February 4, 2009*

**chemistry**

Solid silicon and solid magnesium chloride forms when silison tetrachloride gas reacts with magnesium metal. Write a word equations and an ublanced formula equation. Include all of the appropriate notations.
*February 4, 2009*

**chemistry**

Magnesium oxide forms from magnesium metal and oxygen gas. Write a word equation and an unblanced formula equation. Include all of the appropriate notations.
*February 3, 2009*

**chemistry**

What symbol is used in a chemical equation to indicate the phrase "reacts with "?
*February 3, 2009*

**chemistry**

it is product??
*February 3, 2009*

**chemistry**

symbol used in a chemical equation to indicate the phrase with react with?
*February 3, 2009*

**chemistry**

describe evidence that chemical reactions take place during a firework display
*February 3, 2009*

**chemistry**

describe evidence that chemical reactions take place during a firework display
*February 3, 2009*

**chemistry**

when propane gas C3H8, is burned with oxygen, the products are carbon dioxide and water. Write an unbalanced formula equation for the reaction.
*February 3, 2009*

**algebra**

so for what value is the number underfined?
*February 3, 2009*

**algebra**

Simplify 5x^7y^6/ 4y^6x^3 * 7x^3y^4/6x^2y^5
*February 3, 2009*

**algebra**

Simplify 5x^7y^6/ 4y^6x^3*7x^3y^4/6x^2y^5
*February 3, 2009*

**algebra**

Simplify x^2+6x+5/x^2+8x+15 for what valuesis the number underfined?
*February 3, 2009*

**Math**

0.48m 5213m
*January 28, 2009*

**Math**

48cm = ___m 458cm + 47m + 55cm = ____cm
*January 28, 2009*

**algebra**

factor 6x^6-15x^3+21x^2
*January 25, 2009*

**math**

Factor 6x^6-15x^3+21x^2
*January 25, 2009*

**math**

what does it equal -2
*January 25, 2009*

**math**

factor 8x^3+4x^5
*January 25, 2009*

**math**

put the square roots in lowest terms square root 20 and square root 150
*January 25, 2009*

**algebra**

Find the value of y in the equation y = log 2 32. a. 5 b.16 c.64 d. 1024
*January 23, 2009*

**Math**

I need help setting up this problem: Write the set of points from -7 to 1 but excluding -4 and 1 as a union of intervals.
*January 22, 2009*

**science**

Would water rinse off this dirt, since it is in oil? Why or why not?
*January 16, 2009*

**science**

how do you put the calculation on words?
*January 16, 2009*

**science**

What type of liquid is water? (polar or nonpolar) show your calculations.
*January 16, 2009*

**chemistry**

yes
*January 16, 2009*

**chemistry**

how do you no?
*January 16, 2009*

**chemistry**

What type of molecules can dissolve in polar liquids?
*January 16, 2009*

**science**

Most dirt on your body is nonpolar, and is trapped in oil residue on your skin. What type of liquid is oil? (polar or nonpolar) show your calculations. Would water rinse off this dirt, since it is in oil? Why or why not? Does soapy water rinse off this dirt? Soap: how does it ...
*January 16, 2009*

**chemistry**

What type of molecules can dissolve in polar liquids? What type of molecules can dissolve in nonpolar liquids? What type of liquid is water? (polar or nonpolar) show your calculations.
*January 16, 2009*

**english**

could you give me a summary of it?
*January 15, 2009*

**english**

Comment on Ben Smith's commentary on the "lipstick on a pig" commenting on the motives of Obama's surrogates joking that Palin's record can't be concealed with lipstick, and the motives of the Republican charge that Obama compared Palin to a pig. ...
*January 15, 2009*

**spanish**

That not what I mean i mean in terms of friendship.
*January 15, 2009*

**spanish**

What are some similarities and differences between who is considered a friend in a Spanish- speaking country and in the United States?
*January 15, 2009*

**algebra**

the slope of y=-x+1
*January 15, 2009*

**algebra**

could you show me how to do that please?
*January 14, 2009*

**algebra**

Find the equation of the line With a slope of 3 that goes through the point (-5, -1)
*January 14, 2009*

**8th grade**

Find the equation of the line With a slope of (-1/3) that goes through the point (2, -4) With a slope of 3 that goes through the point (-5, -1)
*January 14, 2009*

**algebra II**

Find the equation of the line With a slope of (-1/3) that goes through the point (2, -4) With a slope of 3 that goes through the point (-5, -1)
*January 14, 2009*

**algebra II**

Find the x and y intercepts: 3x + 4y = 8 8x – 5 =6y
*January 14, 2009*

**social studies**

How did Octavius Valentine Catto die?
*January 9, 2009*

**reading**

bud not buddy vocabulary words list
*January 8, 2009*

**music**

Log on to MTVTr3s and answer the following question : What videos were voted Best of 2008 ? Name the artist and the Title of the Song ? mtvtr3s. com/music/ For some reason I could not find them?
*January 8, 2009*

**Chemistry**

1. How does the strenght of a covalent bond relate to bond length? 2. Compare the degree of polarity in HF, HCL, HBr, and HI? 3. Given that it has the highest electronegativity, can a fluorine atom ever from a non-polar covalent bond? Explain your answer.
*January 7, 2009*

**Chemistry**

1. Why does the distance between two nuclei in a covalent bond vary? 2. How does a molecular orbital differ from an atomic orbital?
*January 7, 2009*

**English**

Why is Edgar Allan Poe insane?
*January 7, 2009*

**English**

Why is Edgar Allan Poe insane?
*January 7, 2009*

**chemistry**

What happens in terms of energy and stability when a covalent bond forms?
*January 7, 2009*

**English**

Ben Smith on Obama: 'Lipstick on a pig' Comment on Ben Smith's commentary on the "lipstick on a pig" remark copied below. Write about commenting on the motives of Obama's surrogates joking that Palin's record can't be concealed with lipstick...
*January 6, 2009*

**chemistry**

Why do molecular compounds have low melting points and low boiling points relative to ionic substances?
*January 6, 2009*

**chemistry**

What information can be obtainted by knowing the electronegativity difference between two atoms?
*January 6, 2009*

**chemistry**

Describe the attractive and repulsive forces that exist between two atoms as the atoms move closer togther.
*January 6, 2009*

**algebra II**

A set of input values is sometimes referred to as the replacement set for the independent variables. Evaluate each function for the given replacement set. f(x)=3x-6;{-3.5,-1,1/4,2,11}
*January 4, 2009*

**algebra II**

A set of input values is sometimes referred to as the replacement set for the independent variables. Evaluate each function for the given replacement set. f(x)=3x-6;{-3.5,-1,1/4,2,11}
*January 4, 2009*

**algebra II**

A set of input values is sometimes referred to as the replacement set for the independent variables. Evaluate each function for the given replacement set. f(x)=3x-6;{-3.5,-1,1/4,2,11} f(x)=x(1-2x);{-8,2/3,1,9,4}
*January 4, 2009*

**Science-please help**

What could you say if a rock had large crystals? Explain. What could you say if a rock layer had a folding? Explain.
*December 21, 2008*

**history**

what were the resolutions that Lucretia Mott came up with?
*December 14, 2008*

**history**

what started first wave feminism? what made women start fighting for their rights?
*December 14, 2008*

**History**

what would be a good idea for a video project on first wave feminism?
*December 10, 2008*

**Biology**

why do people conduct an experiment using pH? whats the purpose of the pH scale? why do we use it?
*November 21, 2008*

**Biology**

Whats the history/background on the pH Scale
*November 20, 2008*

**Health Research Project**

I am having trouble with this also. I think my brain is stuck at this point. How do you find the article E-5.07. When I search that it brings up a ton of articles. Thanks so much!
*November 12, 2008*

**Science**

I have my carbon NMR spectra and my product should not have any N in it but there are peaks for N-H secondary amines...the only nitrogen used was in the catalyst...this should not show up on the spectra, right? If it should not have how would I explain the occurrence of these ...
*November 9, 2008*

**Chemistry**

I need help with getting started: 1.The crystal structure of an ionic compound consists of alternating cations and anions lying next to each other in three dimensions. If the cation radius is 55.1% of the anion radius and the distance between the cation nuclei is 587 pm, what ...
*November 8, 2008*

**chemistry**

i figured it out
*November 8, 2008*

**chemistry**

Write balanced half-cell reactions and equations for the following: Mo24O37(s) + MnO4-(aq) makes MoO3(s) + Mn+2(aq) (BASIC)
*November 8, 2008*

**English (CA)**

my teacher says we should replace the verb to be (is, are,was,were, has been) and there are a couple places in my essay where i cant figure out hiw to change them...any suggestions would be greatly appreciated - Another instance of symbolism in “The Most Dangerous Game&#...
*November 6, 2008*

**math**

solve for x x^2-x+8=0
*October 30, 2008*

**Math**

so what would the x-intercepts be? (SQRT3, SQRT-3) ?
*October 30, 2008*

**Precalc**

how do u find the zeros of x^3+13x^2-16x+8? w/o a calc?
*October 29, 2008*

**Math age problem**

A mother is thrice as old as her son.Six years from now,she will be forty-four yeras more than one-third her son will then be.How old is the mother now?
*October 29, 2008*

**Chemistry**

Yes, the 2nd reaction is the 1st reaction reversed. The book says when you have a reaction that is reversed, take the opposite sign of the ÄH... which should be -154 by that definition. I'm not sure if I am suppose to divide 154 by 2??
*October 28, 2008*

**Chemistry**

HELP!! I cannot find the value of ÄH, for the following reactions. A + 2B --> C + 3D , ÄH = 154 kJ 1/2C + 3/2D --> 1/2A + B, ÄH= ? I have tried the answers -302 and 154 and neither were correct. Have any suggestions?? Thank You!
*October 28, 2008*

**Chemistry**

It worked!! Thanks so much for your help!
*October 28, 2008*

**Chemistry**

I did not get the correct answer... Solve for MassSteel. Here is my work- masssteelx specific heat rod x (Tfinal-Tinitial) + massH2O x specific heat water x (Tfinal-Tinitial) = 0 MassSteel = -massH2O x specific heat water x (Tfinal-Tinitial)/ specific heat rod x (Tfinal-...
*October 28, 2008*

**Chemistry**

I need help! I found the change in Temp= -.9 degree C. I don't know what to do next...? What value from this problem do I use as my q(heat capacity) to plug into the equation q= m X Cs X change T? The question states: 120mL of H2O is intially @ room temp (22 degree C). A ...
*October 28, 2008*

**Pre-Calculus**

SMALL-SAMPLE CONFIDENCE INTERVAL FOR A POPLATION MEAN 90% Confidence Interval = x-bar +/- 1.65 * s/SQRT(n) n = NUMBER OF SAMPLES [3] Cumulative Distribution Function Student's t distribution with 3 DF x P( X <= x ) 1.65 0.901247
*October 26, 2008*

**algebra - Help!**

The local fish market is having a sale on whole fish. the prices are as follows: You can buy an albacore and a barracuda for$21 You can buy a barracuda and a carp for $32 You can buy a carp and a dogfish for $32 You can buy a dogfish and an eel for $37 You can buy an eel and ...
*October 25, 2008*

**rudcing fractions**

how would i reduce 45/108 or make it a mix numberb
*October 25, 2008*

**Dividing fractions**

and how do you reduce fractions isnt it dive the bottom number by the top
*October 25, 2008*

**Dividing fractions**

thank you very very much
*October 25, 2008*

**Dividing fractions**

how do i do 3 and 3/4 divided by 12 and 1/2 plz help
*October 25, 2008*

**Math pizzaz pre algraba**

What magic tricj dies Mr.Utterbunk perform ever evening
*October 25, 2008*

**calc**

calculate the critical points of f(x)=xe^-x i plugged in zero in the derivative, and i got: e^-0*0e^-0 = 0 1*0= 0 so is the critical point zero then???
*October 23, 2008*

**math!**

f(x)=x^3-6x+1 find the critical points, where the function is increasing or decreasing and explain the shape of the graph using the derivative and algebra. i found the derivative to be 3x^2-6. So the critical points are -1.4 and 1.4. The derivative is decreasing until (0,6) ...
*October 23, 2008*

**college calculus**

yes, i feel like such an idiot, but it makes sense now. thank you!!!
*October 23, 2008*

**college calculus**

find a and b so that f(x)=x^2+ax+b has a local min at (6,-5) i found the derivative: f'=2x+a then i found a 0=2x+a 0=2(6)+a 0=12+a a=-12 but i can't seem to get the correct value for b. i plugged -5 into the original function, but my book says the answer is b=31. how ...
*October 23, 2008*

**french**

oops sorry, chemise is shirt, not blouse
*October 23, 2008*

**french**

Au bazar de la ville,- at the village market/bazar il choisit un pantalon rose - he chose pink pants une chemise a pois-a polka dot blouse et des bottes-and some boots en lezard! - not sure what lezard means, je suis desolee.
*October 23, 2008*

** 9th grade english**

you are as unique as an m and m You as sweet as an m an m
*October 23, 2008*

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