Thursday
November 27, 2014

Posts by Student


Total # Posts: 571

ALGEBRA
-32x^5y^4-24x^4y-16x^3y= _ _ _ _ Factor out: -8x^3y
September 17, 2013

ALGEBRA
-32x^5y^4-24x^4y-16x^3y= _ _ _ _ Factor out: -8x^3y
September 17, 2013

Poetry/British Literature/12th grade
Which of the following poems is a dramatic monologue? (A) "My Last Duchess" (B) "Love Among the Ruins" (C) Childe Roland to the Dark Tower Came (D) all of these
August 27, 2013

College Algebra
what is the equivalent logarithmic form of 6^z=244
June 26, 2013

algebra
I have no idea totally lost haven't done any type of math in almost 30 years f(x)= x^4-x^3-7x^2+x+6 all the real roots are bounded by -3 and 4. Explain why these are the upper and lower bounds
June 24, 2013

algebra
how do I find the relative maximum and minimum values of x^4-x^3-7x^2+x+6
June 24, 2013

algebra
solve x^4-8x^3+64x-105=0 given that 2-i is one solution. must be tired cause my steps are not calculating correctly
June 24, 2013

math/algebra
find the domain of the function 1) f(x)= log2( 49-x^2) 2) f(x)=In [1/x+5]
June 23, 2013

math/algebra
solve the equation log2(3x-2) - log2 (x-5)=4
June 23, 2013

math/ algebra
solve the equation log (4x)= log5 + log(x-4)
June 23, 2013

Math/Algebra
Sketch the graph of each piecwise-defined function. Determine the domain and range. Identify each point of discontinuity. f(x)= -x if x<0 4-2x if 0 <or= x<3 2x+1 if x >= 3
May 28, 2013

Math/Algebra
Find the vertex, Focus,and Directrix of the parabola. Graph the equation. y^2=12x
May 28, 2013

Math/Algebra
Graph the ellipse and locate the foci. 16x^2 +9y^2= 144
May 28, 2013

Math/Algebra
Find an equation for the ellipse described. center(0,0); major axis horizontal with length10; length of minor axis is 8
May 28, 2013

Math/ Algebra
Find an equation for the hyperbola described: 1) Vertices at (0,+/- 10); asymptotes at y= 5/3x 2) Vertices at (-+5,0); foci at (-+6,0)
May 28, 2013

Math/Algebra
A bridge is built in the shape of a semi elliptical arch. It has a span of 96 feet. The height of the arch 29 feet from the center is to be 10 feet. Find the height of the arch at its center.
May 28, 2013

physics
Hey can you please tell the numrical answer I can`t get it :)
April 29, 2013

math algebra
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=
April 16, 2013

math algebra
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=
April 16, 2013

math algebra
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=
April 16, 2013

ALGEBRA 2
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
April 16, 2013

ALGEBRA 2
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
April 16, 2013

Biology
Humans have about 20,000 genes in our genome. Explain how cells differentiate into different kinds of cells even though they have the same set of 20,000 genes in their nuclei, so they are genetically identical.
April 12, 2013

Maths
its wrong steve
March 19, 2013

Chemistry
nevermind i got it
March 16, 2013

Chemistry
Hydrocinnamoyl chloride + AlCl3 --> ??
March 16, 2013

Chemistry Equilibrium
Which of the following conditions is always true at equilibrium? deltaG=0, Q=1, K=1, deltaG=deltaG(standard), deltaG(standard)=0, Q=0, deltaG(standard)=1 I'm so confused, please help!
March 14, 2013

~*Math Probability*~
Which expression would you use to figure out the number of ways you can arrange the letters in the word equation? (1 point) 8! 8P4 4P8 4! Five friends are having their picture taken. How many ways can the photographer arrange the friends in a row? (1 point) 150 100 120 80 How ...
March 13, 2013

Calculus
How would I solve the limit for this sequence. [n^(2)]*[1-cos(2.4/n)] I used L'Hopital's rule by putting n^(-2) in the bottom, but I got the wrong answer of -1.44 in the end. Please help, thanks!
March 8, 2013

Chem Problem
Nevermind, I figured it out!
March 1, 2013

Chem Problem
I need help solving this question, I have no idea what I'm supposed to do. What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.165 M in sodium chloride and 0.029 M in magnesium sulfate? Assume ...
March 1, 2013

Chem Problem
I need help solving this question, I have no idea what I'm supposed to do. What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.165 M in sodium chloride and 0.029 M in magnesium sulfate? Assume ...
March 1, 2013

Language Arts
That's what I thought too, but what if you only had to select one? Which one is more of a fact?
February 28, 2013

Language Arts
What fact does the author use to support her opinion about bleach? (1 point) 1. Bleach is a poison. 2. Bleach is an expensive part of processing water. 3. Bleach isn’t terrific to have around. __________________________________________ Note: This is not a question about ...
February 28, 2013

Organic Chemistry
thank you!!
February 22, 2013

Organic Chemistry
NMR: What can be said about proton spin decoupling? a) It depends on the number of attached protons. b) It slows the deshielding effects of π -electron circulation. c) It is the same as Distortionless Enhancement with Polarization Transfer. d) It is an instrumental ...
February 22, 2013

ALGEBRA
use the pythagorean theorem to find b when a=14 and c=y (triangle) b=
February 17, 2013

ALGEBRA 2
the airline cost for x thousand passengers to travel round trip from nyc to atlanta is given by C(x)= radical 0.3x+1 where C(x) is measured in millions of dollars and x> 0. find the airline's cost for 15,000 passengers (x=15) to travel from new york to atlanta. round ...
February 17, 2013

ALGEBRA 2
the airline cost for x thousand passengers to travel round trip from nyc to atlanta is given by C(x)= radical 0.3x+1 where C(x) is measured in millions of dollars and x> 0. find the airline's cost for 15,000 passengers (x=15) to travel from new york to atlanta. round ...
February 17, 2013

algebra
5 radical 5 and 9 radical 5 ____like radicals. a. are b. are not
February 15, 2013

algebra
the length of a rectangular photograph is 5in. more than the width. If the area is 50 in^2 what are the dimensions of the photograph? the width is__in. and the length is ____in.
February 15, 2013

Chemistry
How much energy as heat is removed from the hand when 5.00 grams of Ga initially at 20 degrees C melts? The value of Heat Fusion is 5.576 kJ-mol and the specific heat of Ga is 0.374 J-g-K. Take the final temp to be 29.76 degrees C.
February 8, 2013

Chemistry
How much energy as heat is removed from the hand when 5.00 grams of Ga initially at 20 degrees C melts? The value of Heat Fusion is 5.576 kJ-mol and the specific heat of Ga is 0.374 J-g-K. Take the final temp to be 29.76 degrees C.
February 7, 2013

Physics
A 69990 kg locomotive is traveling at 9.86 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? (The coefficient of rolling friction is 0.002.)
January 22, 2013

English
I can't find anything wrong. I know that an author isn't listed, but I don't see an example of how to properly cite with no author.
January 22, 2013

English
Is the below the correct way to cite an artical from a website in APA? I got marked off on my assignment for having it this way. Researchers at national institute of technology release new data on ethanol. (2013, Jan 18). Drug Week. Retrieved from (website URL)
January 22, 2013

Physics
A sailor climbs to the top of the mast, 12.55 m above the deck, to look for land while his ship moves steadily forward through calm waters at 4.63 m/s. Unfortunately, he drops his spyglass to the deck below. Where does it land with respect to the base of the mast below him?
January 21, 2013

Physics
A ball thrown horizontally at 22.76 m/s travels a horizontal distance of 46.81 m before hitting the ground. From what height was the ball thrown?
January 21, 2013

English
Thanks so much I was worried I would get hate posts you rock!!!!
January 10, 2013

English
HI, I need help on a question I have read both books 50 times now what is the difference between Barrio boy and no gumption please help. And if your going to hate please dont state thanks!!!!
January 10, 2013

APUSH
Please help! What event made the ratification of the Treaty of Versailles virtually impossible? a. The fact that Wilson had not taken any representatives from the opposition to France b. Wilson's open contempt for the opposition in the Senate c. Wilson's tactics of ...
December 28, 2012

APUSH
Race relations were _____ during World War 1: a. improved thanks to the efforts of government programs b. had moments of violence, but predominately improved material wealth for blacks in the north c.were among Wilson's top priorities; he had strong relations with W. E. B...
December 26, 2012

SUPER SUPER SUPER NEED OF HELP
What is the name of money is used in Haiti? What does the word? Why are there windows and portals on European banknotes? Look at all the countries whose money is straightforward. What they have in common? Is that the Canadian dollar has the same value as the U.S. dollar? I ...
December 16, 2012

chemistry
but answer is not right its not 5.00*10^22
December 14, 2012

chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in ...
December 14, 2012

chemistry
A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.35 kg m-3. Under these conditions the total surface area of the balloon is 0.57 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1. Calculate the rate of ...
December 14, 2012

chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 165.0 ppm and is initially uniform through the thickness of the steel. The atmosphere of...
December 14, 2012

CHEMISTRY
i cant get right answer pls help
December 14, 2012

chemistry
A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.5 kg m-3. Under these conditions the total surface area of the balloon is 0.72 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1. Calculate the rate of ...
December 14, 2012

chemistry
The diffusion coefficient of silver (Ag) in copper (Cu) has the following values: T (K) D (m2s-1) 923 5.42 x 10-16 1173 1.34 x 10-13 (a) Calculate the activation energy for diffusion of silver in copper. Express your answer in units of J/mol.
December 14, 2012

chemistry
A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.5 kg m-3. Under these conditions the total surface area of the balloon is 0.72 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1. Calculate the rate of ...
December 14, 2012

chemistry
(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
December 14, 2012

algebra
X^2 x+15 ----- * ------ = X^2+7 x
December 9, 2012

algebra
X^2 * x+15 X^2+7 x
December 9, 2012

Physics
Twice as massive.
November 13, 2012

Chemistry
the answer for b above is totally wrong, >= 3.
October 29, 2012

physics
7.09 m/s
October 21, 2012

english
Your Answer B. Figure of speech MY RESOURCE - 100% graded assignment JUST REMEMBER IT IS IMPORTANT TO UNDERSTAND WHY THAT ANSWER IS CORRECT. Look at definitions closely
October 16, 2012

precal
A pile driver pounds a steel column into the ground. On the first drive, the column is pounded 1.65 metres into the ground, and on each successive drive it moves 80% as far as it did on the previous drive. The least number of drives required to drive the column a total of 8.2 ...
October 14, 2012

Dynamics
Fricken Jeff... Stuck on this one, too. Screw this homework!
September 23, 2012

chemistry help!
Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol. How much potassium nitrate has to dissolve in water to absorb 105 kJ of heat?
September 19, 2012

AP Calc
What are the zeros (roots) of the function 2x/((x^2)-1) ? Would it just be (0,0)? Thanks in advance!
September 13, 2012

calculus
The point P(4, −2)lies on the curve y = 2/(3 − x). (a) If Q is the point(x, 2/(3 − x)),use your calculator to find the slope mPQ of the secant line PQ (correct to six decimal places) for the following values of x. 1) 3.9 mPQ= 2) 3.99 mPQ= 3)3.999 mPQ= 4) 4.1 ...
August 28, 2012

chem
no question - just thank you "drbob", you've answered a few of my questions.
July 14, 2012

CALCULUS!
When S is sales and t is time, and the original function is S(t), what does S'(24)>0 and S''(24)<0 represent?
May 24, 2012

CALCULUS!
When S is sales and t is time, and the original function is S(t), what does S'(24) and S''(24) represent?
May 24, 2012

Calculus PLZ HELP!
What is the limit as x approaches infinity of a constant? Is it the constant or zero? Thanks in advance!
May 24, 2012

Everything
Ms.Sue is 9/10 a possible teacher. As a teacher she could probably tell that this student doesn't need any help with the work. Just wanted the answers not any help. There are teachers on this site you know. If these students keep up this cheating this site could get ...
May 8, 2012

HISTORY PLEASE HELP!
I think the answer is B. Is that correct?
April 17, 2012

HISTORY PLEASE HELP!
The earliest and most enthusiastic proponents of Manifest Destiny were: A. Investment Bankers B. Eastern Politicians C. Northeast Industrialists D. Southern Proslavery Advocates E. Protestant missionary groups
April 17, 2012

HISTORY
The minister sent to Mexico in 1845 had strict orders to accomplish what as his primary goal? A. Secure Mexican approval of the annexation of Texas B. Purchase California for $25 million C. Get Mexico to grant their claims to Oregon to the US D. Settle the $3 million in claims...
April 15, 2012

chemistry
A certain first order reaction has a rate constant of 3.75x10^-2 s^-1 at 25.0C. What is the value of k at 70.0C when the activation energy is 135 kj/mol? Would I use the formula K=Ae ^-Ea/RT even though I have two temperatures?
March 14, 2012

CHEM HELP!
Thank you for taking the time to answer me on this. I used the gaw law to solve for NH3 for the mass of it to then add it to the mass of H2S to find NH4HS. I think Im still a little confused on how to go about this, but hopefully by your answer I can figure it out.
March 12, 2012

CHEM HELP!
I plugged in the values P is pressure I have for NH3 which is 2.78, 5L for V, n, R the gas constant and T 298K. to get .5684 mol to .03388 g of NH3
March 12, 2012

CHEM HELP!
after using the ideal gas law to find moles then mass of NH3 to add to the H2S I got a answer of 3.0334g This is my last attempt to enter in a answer for the program I am using and I dont want to lose points, obviously. I just want to see if anyone can check to make sure I am ...
March 12, 2012

CHEM HELP!
NH4HS<-->NH3+H2S What is the minimum mass of NH4HS that must be added to the 5.00-L flask when charged with the 0.300g of pure H2S, at 25C to achieve equilibrium?? Kp=.120 at 25C initial pressure of H2S in flask = .0431atm partial pressures of H2S and NH3 .326, .369 mole...
March 12, 2012

Calculus (Intermediate Value Theorem)
If f(x)= x^3-x+3 and if c is the only real number such that f(c)=0, then c is between ______?
March 12, 2012

chemistry help!!!!!
so this set up would be 1.6= (1-p)^2/p which then turns to p^2+1.6p-1 then solve the quadratic equation?
March 11, 2012

chemistry help!!!!!
Oops! I thought that was there. It is A(g)<-> 2B(g)
March 11, 2012

chemistry help!!!!!
Consider the following reaction: Find the equilibrium partial pressures of A and B for each of the following different values of Kp. Assume that the initial partial pressure of B in each case is 1.0 atm, and that the initial partial pressure of A is 0.0 atm. Make any ...
March 11, 2012

chemistry
could you please explain the last question, c, again. Ive tried a few times but I am still getting it wrong.
March 11, 2012

chemistry
Ah! Yes that worked out perfectly! Thank you so much for the help. That one really had me stuck!
March 11, 2012

chemistry
Oh okay that makes more sense now. Thank you for clearing that up. I tried entering in 2.78 for my partial pressure of NH3 but the program I am using is telling me that is incorrect?
March 11, 2012

business
outline the role team work or team building can play in the business planning process?
March 11, 2012

Finance
$4,000.08 4,200 * .9524 = 4,000.08
March 7, 2012

Probability
Thank you for the explanation MathMate! Would the answer to this question be A? Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her ...
March 4, 2012

Probability
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78 Explanation please??
March 4, 2012

Probability
How did you get this? = 6C4 (½)^4 (½)^2 + 6C5 (½)^5 (½)^1 + 6C6 (½)^6 (½)^0
March 4, 2012

Probability
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78
March 4, 2012

Math
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78 Is it B?
March 3, 2012

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