Thursday

April 2, 2015

April 2, 2015

Total # Posts: 1,734

**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*

** 9th grade english**

isnt a metaphoring comparing to things using like or as
*October 23, 2008*

**social studies**

like how he says he wants to give the taxes or somthing like that to other people
*October 23, 2008*

**social studies**

his fault like as in raising the taxes or distrapution
*October 23, 2008*

**social studies**

I need help making a political cartoon. It needs to be about obama any help is greatly apreciated
*October 23, 2008*

**english**

Well M and m are all diffrent colors and since all the m and m arent the same color it means there uniquine and people arnt all the same we are all unique do you get what i am saying
*October 23, 2008*

**english**

what do you mean like an M and m candy
*October 23, 2008*

**calc I**

how do i find the critical points of the function g(x)=xe^-x i think the derivative is xe^-x*-x^2e???
*October 23, 2008*

**calc I**

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*

**calculus I**

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.
*October 23, 2008*

**english**

thank you!
*October 22, 2008*

**english**

what exactly does this phrase mean.... such discourse facilitates the praxis of hope??? i think it means that discussion facilitates the practice of hope...but i looked up the definition of praxis and i'm not sure which one fits the context of this sentence.
*October 22, 2008*

**Chemistry**

How do I convert the atmospheric pressure = 30.17in to mmHg? also how do I convert to mm H2O?
*October 21, 2008*

**ap biology**

what are two examples of roles of predation in population control (tundra biome)
*October 21, 2008*

**college biology**

why is autophagy not considered endocyctosis?
*October 19, 2008*

**Pre-calculus**

This is a right triangle. Therefore the Pythagorean Law applies. 150^2+300^2= Distance^2 22500+90000=D^2 112500=D^2 335.41=D Rounded to the nearest tenth, D=335.4 feet
*October 19, 2008*

**Biology**

What is an adenosine triphosphate? I don't understand the fancy definitions. Can some one please simplify it for me? Thanks!
*October 8, 2008*

**6th grade**

They are lines that run next to each other, but can go on forever and never meet or intersect.
*October 8, 2008*

**Current events**

Does anyone know pakistan's current position on russia/georgia, the environment,and the status of permanent refugees?
*October 5, 2008*

**Math**

Can you explain that?
*October 2, 2008*

**Math**

what is the answer if, for example, the base number is 8 and the exponent is 0?
*October 2, 2008*

**Math**

S = 11 + 18 + 27 + 38 + 51 + 65 + 82 + .........+Tn S = 11 + 18 + 27 + 38 + 51 + 65 + ................ + Tn --------------------------------------... 0 = 11 + (7 + 9 + 11 + 13 + ....(n-1).terms.................) - Tn 0 = 11 + (n - 1)/2 [14 + 2(n - 2)] = 11 + (n - 1)(n + 5) - ...
*October 1, 2008*

**math**

Determine if there exists a real number that is exactly one less than its cube. If so, find the value of the number. (Hint: IVT)
*September 30, 2008*

**Science**

A girl is pulling a sled up a hill with a force of 5N. The wind is blowing at her back (uphill) with a force of 15N. The force of gravitity is 20N and friction between her boots and the snow is 5N. What is the net force, including direction, of this situation?
*September 30, 2008*

**Math**

You have 84 coins, in dimes or nickles that equal $7.15, how many dimes and nickles
*September 30, 2008*

**Science**

A car is driving up a hill with a force of 40N. The wind is blowing downhill with a force of 10N. Gravity is affecting th car with a force of 20N. The force of friction is 9N. What is the net force, including direction, of this situation?
*September 30, 2008*

**Pre-calculus**

x = r cos(45) ...(1) y = r sin(45) ...(2) Dividing (2) by (1): y / x = tan(45) = 1 y = x.
*September 30, 2008*

**math**

WHAT EVER YOU DO TO ONE SIDE YOU DO TO THE OTHER SIDE
*September 29, 2008*

**math**

-10h-6=24 +6 +6 10h 30 _--- _----- 10 10 h=3 SADS =same sings add different subtract
*September 29, 2008*

**math**

can you put patterning questions up on your website like youdidfor algebra an arthemitics?
*September 28, 2008*

**Philosophy - Logic**

I keep getting different answers from different sources on these questions... I'm still not sure. Anyone else who can lend their opinion? #1 I need to know if this is a real or apparent argument. A: I saw Bob with Mary last night. B: You saw Frank, Bob's identical twin...
*September 14, 2008*

**LOGIC**

Oops. In the first set of statements, both statements should read "Mary."
*September 10, 2008*

**LOGIC**

I keep getting different answers from different sources on these questions... I'm still not sure. Anyone else who can lend their opinion? #1 I need to know if this is a real or apparent argument. A: I saw Bob with Mary last night. B: You saw Frank, Bob's identical twin...
*September 10, 2008*

**Philosophy - Logic**

#1 I'm having trouble understanding why you say it is not a real arguement. Person A is stating that he saw Bob and person B is saying that person A really saw Frank. How is it possible for the two statements to both be true and thus inconsistent? #2. Can't person A ...
*September 10, 2008*

**Philosophy - Logic**

I have a few logic questions that I am having difficult with and would be greatful for any insight... #1 I need to know if this is a real or apparent argument. A: I saw Bob with Mary last night. B: You saw Frank, Bob's identical twin, with Marsha last night. I'm ...
*September 10, 2008*

**Math/Calculus**

Find k so that the following function is continuous on any interval: f(x)= kx 0 (less than or equal to) x (less than) 2 3x^2 2 (less than or equal to x) i know the answer is 12 but i don't know how to arrive at that. could you please walk me through the steps? thanks.
*September 9, 2008*

**HELP! MATH**

cold yam is put into a hot oven, the temperature of the yam begins to rise. The rate R in degrees per minute at which the temperature rises is governed by Newton's Law of Heating, which says that the rate is proportional to the temperature different between the yam and the...
*September 7, 2008*

**Math**

A cold yam is put into a hot oven, the temperature of the yam begins to rise. The rate R in degrees per minute at which the temperature rises is governed by Newton's Law of Heating, which says that the rate is proportional to the temperature different between the yam and ...
*September 7, 2008*

**Calculus**

A cold yam is put into a hot oven, the temperature of the yam begins to rise. The rate R in degrees per minute at which the temperature rises is governed by Newton's Law of Heating, which says that the rate is proportional to the temperature different between the yam and ...
*September 7, 2008*

**French**

1. j'ai un ordinateur. 2. vous n'avez pas de chaise. forms of avoir j'ai tu as il/elle a nous avons vous avez elles/ils ont
*September 7, 2008*

**earth science**

how does radioactive decay provide heat energy within the earth
*July 19, 2008*

**Algebra**

A guy wire reaches from the top of a 24 ft. pole to a point on the ground 8 ft. from the pole. Find the length of the wire.
*June 18, 2008*

**geometry**

i didn't understand the concept of symmetry in maths ? what is its use in the field of mathematics? what is tha aplication of symmetry of symmetry in various fields. somevdy please answer
*June 14, 2008*

**Spanish 2**

Write correct preterite forms of the verbs ir and estar to complete conversatin. Claudia y yo ______a comprar sellos; _______ en el correo por quince minutos. Elías _________ a cobrar un cheque; ______ en el banco por veinte minutos. Irene y Marcos ______ a comprar unos...
*June 13, 2008*

**civics**

what amendment number restricts the president in regards to treason, bribes, and being impeached?
*May 27, 2008*

**Italian**

How do you say "twin town" in Italain. I know its "Une ville jumelle" in french. A.s.a.p X
*May 26, 2008*

**science**

How is sickle cell anemia maintained in our world (why doesn't it eradicate itself)?
*May 25, 2008*

**science**

can someone help me answer this question? How is the sickle anemia gene maintained (why doesn't it destroy itself)?
*May 25, 2008*

**science**

I dont understand what this question is asking (what does it mean by physiology) Explain the physiology of sickle cell anemia.
*May 24, 2008*

**french**

Ok thank-you! I also have a question: I said the address was 34, rue.... and that still is the address. Should I use the imparfait for that or is it o.k.? Nous sommes allées au Musée des Tissus et des Arts Décoratifs à onze heures. L’adresse a...
*May 23, 2008*

**french**

CAn someone proof read this? Nous sommes allées au Musée des Tissus et des Arts Décoratifs à onze heures. L’adresse a été 34, rue de la Charité, Lyon, France 69002. Nous avons vu des textiles du dix-huitième si&...
*May 23, 2008*

**english**

nevermind
*May 22, 2008*

**english**

how can i use the word caustic in a sentence that relates to the book "A Separate Peace"
*May 22, 2008*

**science**

I do not understand this question. I tried to answer it but I am completely at a loss. Can someone help? Describe how the number of antibodies produced and time it takes to produce such antibodies differs between first time exposures and all subsequent exposures.
*May 20, 2008*

**Pre-Algebra**

I am having problems with graphing inequalities how do you do them for example x + y < 3 or x> -2
*May 18, 2008*

**Organic Chemistry**

I just wanted to get these checked. I think 1 is b, 2 is a, 3 is d, 4 is c, 5 is e and 6 is a
*May 13, 2008*

**Organic Chemistry**

I got some multiple choice questions to practice and I'm not sure of how to get the answers... 1). Which of the following corresponds to the COC bond angle in dimethyl ether?-94 degrees, 110degrees, 180 degrees, 122 degrees, or 60 (i think it's 110 2). classify the ...
*May 13, 2008*

**chemistry**

Yup! Thank you!
*May 12, 2008*

**chemistry**

I'm reviewing for a test tomorrow, and I was wondering about this question. Convert 55 mi/gal to meters/liter. I'm not sure how to go about it, though when I tried it I got 89000.0m/4L. But, I'm not sure if that is right.
*May 12, 2008*

**chemistry**

Okay, good. I think I'm all set then. Thank you!
*May 7, 2008*

**chemistry**

I was thinking that if, for example, two different pressures were given, two different volumes were given, two different temperatures were given and only one mole, then you use P1V1/n1T1...etc to find the missing mole. But, if only one pressure, one volume, and one temperature...
*May 7, 2008*

**chemistry**

I know how to use the equations pv=nrt and P1xV1/n1xT1 = P2xV2/n2xT2, but I don't understand when to use them. I have a test tomorrow and I'm going over some word problems, but I can't figure out how decide which formula you need to use. Is there a specific way to ...
*May 7, 2008*

**Chemistry -- to Dr.Bob I need your help!!!**

how do you do this
*May 6, 2008*

**history, and your opinion**

The songs Lift Every Voice and Sing and America the Beautiful both have religious refernces in the first stanza. Our current national anthem, The Star Spangled Banner does not. Traditonally only the first stanza is sung at baseball games and events. I need to come up with ...
*May 5, 2008*

**Chemistry**

So, for KCl, using the graph... T.....mass KCl/100 mL 10....30 20....32 or 33 30....35 40....38 50....41 60....44 70....46 80....49 90....52 or 53 100...56
*May 5, 2008*

**Chemistry**

In the question above this one it says refer to a solubility chart, but my professor never taught us how to answer these questions while using a solubility chart so I have no idea what to do. I've tried going to his office hours for help, but he's only there when I ...
*May 5, 2008*

**Chemistry**

How many grams of KCl can you dissolve in 50. g of water at 70 degrees C?
*May 5, 2008*

**Chemistry**

Thank you, I made the change. My professor is very precise, so I'm glad you noticed that!
*May 2, 2008*

**Chemistry**

mols HCl = 0.750 M x 0.025 L = 0.0186 mol M = 0.0186 mol/0.500 L = 0.0372 the answer is 0.0372 mol/l
*May 2, 2008*

**Chemistry**

What is the concentration of a solution prepared by diluting 25.0 mL of HCl 0.750 mol/L to a final volume of 500. mL?
*May 2, 2008*

**Advanced Math**

Find the values of x for which the equation sin x = -1 is true 2 pi n pi/2 + 2 pi n pi + 2 pi n 3 pi/2 +2 pi n Can someone please help. I dont understand how to do this.
*May 1, 2008*

**chemistry**

If A is a non-polar chemical and B is a non-polar solvent, what type of solubility (high or low) would you expect between A and B? --Is it high solubility?
*April 29, 2008*

**Chemistry**

So, if I convert mmHg to atm I get .904 atm. When I plug that into the equation, the final answer is 67.1 L?
*April 22, 2008*

**Chemistry**

Okay... 1) 275 g NaCl ----> 4.71 mol NaCl 2) Next, 4.71 mol NaCl * 1Cl2/2 NaCl = 2.36 mol Cl 3) V= nRT/P v= (2.36 mol)(0.0821 L atm/K Mol)(313K)/687mmHg = 0.0883 L Final answer: v = 0.0883 L
*April 22, 2008*

**Chemistry**

Sodium reacts with chlorine gas according to the reaction:\ 2 Na (s) + Cl2 (g) ---> 2 NaCl (s) What volume of chlorine gas, measured at 687 mmHg and 313 K, is required to form 275 g of NaCl?
*April 22, 2008*

**Chemistry**

Is this correct? (755 mmHg)(400.0cm^3)/298 K = (P2)(50.0cm^3)/(358 k)
*April 21, 2008*

**Chemistry**

If a gas has a volume of 400.0 cm cubed at a pressure of 755 mmHg and a temperature of 25 degrees celsius, what would be its pressure (in atm) at 85 degrees celsius if the volume is reduced to 50.0 cm cubed?
*April 21, 2008*

**Chemistry**

A tank contains 0.450 kg of oxygen(O2) compressed into a volume of 2.32 L. Estimate the gas pressure (in atm) inside the tank at 5 degrees celsius. Do I convert 0.450 kg from grams to moles, and if I do, do I use the molar mass of oxygen?
*April 19, 2008*

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