Friday

October 24, 2014

October 24, 2014

Number of results: 94,885

**Math - Factoring/Decomposition**

16y^2 - 4y + 1 = 0 I'm trying to find the roots for the equation. What do I do next after this step: 4y (4y - 1) + 1 = 0
*November 20, 2007 by Anonymous*

**math factoring**

6x4-5t3-200t-163000 how do you factor this it cant be done by common factor or decomposition method..help!!
*September 15, 2010 by Bobby*

**Math-Factoring**

Hey I need help factoring 5x^4-180x^2. I'm used to factoring with three numbers, and not two. How would you do just two like this? Thanks
*January 19, 2009 by Greg*

**factoring**

Factor x3 + 9x2 + 27x + 27 Factor 8a3 + 60a2b + 150 ab2+ 125b3 I tried doing them, but I just don't get how; perfect squares didn't work and neither did decomposition... someone please help me.
*December 4, 2007 by Chujung*

**GR.10 MATH.**

i want to noe what is the DIFERENCE between partial and complete factoring. an e.g of a partial factoring problem is y=2x^2+8x+5 an e.g of complete factoring is y=x^2+3x-10
*April 27, 2009 by nini*

**Factoring**

x2(squared)-4x+4 I would factor this into (X - 2)(X - 2) If you don't know the rules for factoring, post, and we can show you how to do it. I don't know the factoring rules. My algebra teacher couldn't teach.
*September 20, 2006 by Amanda*

**Math: Factoring**

I'm having a hard time factoring polynomials, especially 3rd degree. -x^3+2x^2+4x-8 -x^3-5x^2+20x+12 I don't know how to begin. I thought long division, but what would I divide by?
*December 2, 2007 by Amelie*

**factoring**

I cannot figure these out.Can someone Factor completely: 3x2 - x - 4 I suppose this is actually 3x^2 -x-4 If so: (3x-4)(x+1) Now I'd like you to look at the following website: http://tutorial.math.lamar.edu/AllBrowsers/1314/Factoring.asp
*May 23, 2007 by Jojo*

**math?? factoring**

100N/m d^2 - 57.3d= 0 sigh...I can't figure out how to find d know it's factoring but as to actual number to factor out...not so sure. Thanks
*April 14, 2008 by ~christina~*

**Math - factoring**

Solve by factoring: 1.) x^2 - x - 12 = 0
*September 9, 2010 by Anna*

**Math(factoring)**

I need help with factoring trinomials completely. My teacher's example is: 2x^2-12x+18 2(x^2-6x+9) 2(x-3)(x-3) I need help with: 6x^2-26x-20 I just can't get this stuff so if you can please help me I'd greatly appreciate it.
*February 29, 2008 by Nick*

**Math (Algebra 2)**

Factoring by Using a Quadratic Form Problem: x^4 + 8x^2 - 20 What I have so far: (x^2)^2 + 8(x^2) - 20 a^2 + 8a - 20 For some reason my textbook says to substitute the (x^2) with (a) as you can see in the las step. The next step after that is factoring [a^2 + 8a - 20].
*January 31, 2011 by Mike*

**chemistry**

The decomposition reaction, x-->products, is second-order with rate constant k=0.0183 L/(s)(mol). How long will it take for the decomposition to be 95% complete, if the intitial concentration of X is 1.25mol/L? Thanks
*June 18, 2014 by Jin*

**Algebra**

Steps to factoring this x^3 - 8 ? I'm only used to factoring out the x when the x is in the equation like x^ + x + x
*October 3, 2010 by Anonymous*

**Precalc factoring**

im stuck on factoring (x-1)(2x^3+13x^2+8x-35) do i use synthetic division? if so what zero? thnks.
*October 29, 2012 by Rebekah*

**Factoring- precalc**

im stuck on factoring (x-1)(2x^3+13x^2+8x-35) do i use synthetic division? if so what zero? thnks.
*October 29, 2012 by Rebekah*

**Algebra Question**

When I'm factoring ax^2 + bx + c, is it fine to switch signs in the factoring answer? For example: Can (2x - 5)(3x + 5) become (2x + 5)(3x - 5)?
*March 7, 2014 by Anonymous*

**Math help please**

I'm so lost on this math Hw it's over factoring variables and I don't get it. Like my teach said that we are supposed to have the number and letter in front of everything. For example: -14x^2-7x+21 For factoring I got 7x(-2x-1+3) Because my teacher told me to to combine both 7...
*February 24, 2014 by Anonymous*

**FACTORING HELP ASAP**

i dont know how this works.. but im helping my friend with some factoring and i have a few questions
*February 11, 2006 by Cait*

**Math**

My son's homework asks us to find the product by factoring the tens. The problem is 6 x 2, 6 x 20 and 6 x 200. I see how to do 6 x 2 (memory factor) and the 6 x 20 would be (6 x 2) and (1 x 10) then 12 x 10 = 120 but how does he show his work for 6 x 200 factoring by tens? Help
*September 16, 2013 by Denise*

**Math**

2x(x+3) = 0 Is there a way to solve that using the below methods? Substitute zero for f(x) and find the roots of the resulting equation, or graph the function and determine the x-intercepts of the graph. Finding the roots of a single variable equation may involve factoring. ...
*December 5, 2011 by -Untamed-*

**Chemistry**

The following reaction represents the decomposition for water: 2H2O - 2H + O How many molecules of hydrogen are produced from the decomposition of 12.2 grams of water into its elements?
*March 25, 2010 by Stacey*

**MORE MATH**

What is the factoring by grouping? When factoring a trinomial, why is it necessary to write the trinomials in four terms? I will be happy to critique your thinking on this. I do not understand to even answer it? (Broken Link Removed) (Broken Link Removed) How do we determine ...
*June 14, 2005 by jenn*

**Sally**

I have a factoring question; what is 8a^2-8a-30? I've been working on this for a while and I think I understand factoring, but I'm not getting the right answer, which is supposed to be 2(2a-5)(2a+3). Any help would be so appreciated! :)
*September 23, 2008 by Math*

**Chemistry**

How many liters of oxygen gas at 153 degrees celsius and 0.820 atm can be produced by the decomposition of 22.4 g of solid KClO3? (The other decomposition product is solid potassium chloride)
*January 29, 2010 by Fred*

**factoring**

Factor completely: 2x2 – 50 To indicate x squared, use this notation — x^2. 2x^2-50 = 2(x^2-25) You should be able to continue the factoring with the site that Lance has given you. I hope this helps. Thanks for asking.
*May 23, 2007 by Jojo*

**math (factoring quadratic trinomials)**

i am doing factoring with quadratic trinomials, And I dont understand any of it! The problem im working on is 5p2-22p+8 I factored it out to be (5p2-20p)(40p2-2p) I am so stuck, can anyone help
*March 10, 2009 by Tiffany*

**chemistry**

Suppose you do not know the enthalpy of decomposition of the process: CaCO3 = CaO + CO2 Explain in terms of thermodynamic parameters why heating to a high temperature might turn this decomposition to a spontaneous process.
*April 18, 2013 by Catherine*

**Chemistry **

The ¡°air¡± that fills the air-bags installed in automobiles is actually nitrogen gas produced by the decomposition of sodium azide, NaN3. Assuming that the decomposition of sodium azide produces both nitrogen and sodium metal (Na), what volume, in litres, of nitrogen gas is ...
*November 2, 2012 by Jim *

**chemistry**

Oxygen can be produced by the thermal decomposition of mercuric oxide: 2 HgO(s) → 2 Hg(l) + O2(g) How many liters of O2 are produced at 50.0°C and 0.947 atm by decomposition of 57.0 g of HgO?
*May 18, 2011 by Mike*

**chemisty**

Use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 is also a product of the decomposition.
*September 24, 2009 by cheryl*

**science**

Use the mole ratio of CuO produced per mole of malachite to write a balanced equation for malachite decomposition reaction. Assume that CO2 is also product of the decomposition.
*April 16, 2010 by Jen*

**chemistry kinetics**

Decomposition of an organic compound A follows first order kinetics. Initial concentration of A is 2 M. If rate constant of the decomposition is 3.58 × 10^−6 min^-1 , calculate the rate after 3 hours.
*May 24, 2012 by swa*

**chem**

The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5 10-2 s-1. (a) If we begin with an initial SO2Cl2 pressure of 425 torr, what is the pressure of this substance after 74 s? what is the equation to ...
*February 2, 2013 by Hannah*

**Decomposition reaction**

List the number of reactants and the number of products in a decomposition reaction; 2H2O(I)=2H2(g)+O2(g)
*February 26, 2014 by Eric*

**Chemistry**

The thermal decomposition of potassium chlorate can be used to produce oxygen in the laboratory. What volume (L) of O2 gas at 25 °C and 1.00 atm pressure is produced by the decomposition of 7.5 g of KClO3 (s)? Here is my work: V=nRT/P .0611995 mol of O2 x .0821Latm/molL x298....
*June 17, 2009 by Gweedo*

**Chemistry (rate reactions)**

The rate constant for the thermal decomposition at 85 degrees Celsius of dinitrogen pentoxide equals 6.2 x 10 raised to -2 min. As determined by experiment this decomposition is first order-- 2 N2O5 ----> 4 NO2 + O2 Calculate the rate of the reaction when N2O5= .40 M
*September 19, 2011 by Sheldon*

**CHEMISTRY**

The following reaction represents the decomposition of hydrogen peroxide: Balanced equation: 2H2O2 -> O2 + 2H2O How many moles of oxygen are produced from the decomposition of 3.4g of hydrogen peroxide? How many molecules of O2 are produced? For the second question, is the ...
*February 23, 2012 by Emma*

**math**

6. Solve by factoring. m² + 8m + 7 = 0 (1 point)8, 7 –7, 1 *–7, –1 7, 1 7. Solve by factoring. n² + 2n – 24 = 0 (1 point)–12, 2 –2, 12 *–6, 4 –4, 6 Please Help
*February 26, 2013 by James*

**Chemistry**

a 2.16g sample of Pb(NO3)2 is heated in an evacuated cylinder with a volume of 1.18L. the salt decomposes when heated: 2Pb(NO3)2 (s)_> 2PbO (s) +4NO2 (g) +O2 (g) Assuming complete decomposition, what is the pressure in the cylinder after decomposition and cooling to a final...
*January 3, 2012 by mary*

**chemistry**

Lime, CaO, is produced by the decomposition reaction CaCO3(s) ® CaO(s) + CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?
*August 9, 2012 by Anonymous*

**chemistry**

3. Use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO₂ is also a product of the decomposition. CuCo3*Cu9OH)2 -----> 2Cuo+Co2+H2O 0.004522431 moles of malachite 0.01257071 moles...
*May 3, 2010 by Sally*

**Chem**

An electrochemical cell based on the decomposition of H2O2 can be constructed based on the half-reactions in the table below. Half-Reaction | Standard Reduction Potential, E° H2O2+ 2e- => 2 OH- | 0.88 V O2+ 2 H2O + 2e- => H2O + 2 OH- | -0.15 V (d) Calculate the value of ...
*April 23, 2013 by Jess*

**algebra,math**

My qustion is for the following the problem reads as follows (x-1)^2 = 7 x-1=+- sqrt 7 x= 1+- sqrt 7 the method they use was factoring in order to simplify the equation to make it easier is this correc? x^2-9x-4=6 x^2-9x-10=0 (x-10)(x+1)=0 What method did they use here I think...
*April 2, 2007 by jasmine20*

**Algebra**

What is factoring by grouping? When factoring a trinomial by grouping, why is it necessary to write the trinomial in four terms?
*February 22, 2009 by Bo*

**Chemistry**

The following reaction represents the decomposition of hydrogen peroxide: 2H2O2 -> O2 (g) + 2H2O (l) How many molecules of water are produced from the decomposition of 3.4g of hydrogen peroxide, H2O2? Please help, I got 0.02 molecules of water but need to verify my answer (...
*October 17, 2010 by Dee*

**Chemistry**

I don't understand these two questions. Any help on how to figure this would be great. Thanks. 1. Write the equation for the decomposition of the hydrate, MgC*XH₂O 2. Write the equation for the decomposition of the hydrate, CuSO₄*XH₂O.
*February 15, 2010 by Matt *

**factoring**

let f(m)=m^3 + 3m^2 + 3m + 1 notice f(-1) = 0, so m+1 is a factor. Using division, the answer is m^2 + 2m + 1 which factors once more to (m+1)(m+1) so you have (m+1)^3 = 0 and then m = -1 Are you familiar with Pascal's triangle? Did you notice the pattern in the coefficients 1...
*March 11, 2007 by Reiny*

**Algebra**

I am having issues with factoring. I am trying to check my work using a TI84 Plus calculator but I don't know how to plug in a problem to check its factoring. Can anyone help? for example 44y^3+55y^2-11xy how can I go about plugging that in to check my work?
*March 27, 2014 by Christopher*

**College Chemistry**

The following data are obtained for the decomposition of N2O5 at a certain temperature: 2N2O5(g)↔4NO2(g) + O2(g) Time(s) 0 200 400 600 800 N2O5 (atm) 2.10 1.85 1.63 1.43 1.26 Find the rate constant kobs for this first-order decomposition reaction in sec-1 So far I have ...
*February 6, 2011 by cara*

**Algebra: factoring**

I need to find the value of x. 9x^3 + 9x = 30x^2 It's confusing because apparently I have to do 9x^3 + 9x and then add the + 30x^2 to it, and then make it equal 0, so it ends up like this: 9x^3 + 9x + 30x^2 = 0 And afterward, I would factor it. How do you factor it? I'm having...
*December 4, 2008 by Rachelle*

**Chemistry**

The following reaction represents the decomposition of hydrogen peroxide 2H2O2 -> o2 (g) + 2H2O (l) How many molecules of water are produced from the decomposition of 3.4g of Hydrogen peroxide, H2O2? Please walk me through this one, I need more then just the answer, I need ...
*October 19, 2010 by Andre*

**Chemistry**

NaN3 is used in some automobile air bags. The impact of a collision triggers the decomposition of NaN3 as follows: 2NaN3(s) to 2Na(s) + 3N2(g). The nitrogen gas produced quickly inflates the air bag between the driver and the windshield. Calculate the volume of N2 generated at...
*August 6, 2010 by HaldriecH*

**DQ**

What is factoring by grouping? When factoring a trinomial by grouping, why is it necessary to write the trinomial in four terms?
*February 22, 2009 by Bo*

**Chemistry**

Dinitrogen pentoxide, N2O5, decomposes by a first-order reaction. What is the initial rate of decomposition of N2O5 when 3.6 g of N2O5 is confined in a 0.77 L container and heated to 65°C? For this reaction, k = 5.2 x 10^-3 s-1 in the rate law (for the rate of decomposition of...
*June 28, 2013 by Sara*

**Chemistry**

For the gas phase decomposition of chloroethane, CH3CH2Cl C2H4 + HCl the rate constant at 723 K is 1.75E-4 /s and the rate constant at 769 K is 2.19E-3 /s. The activation energy for the gas phase decomposition of chloroethane is
*January 23, 2014 by Breauna*

**Science**

For carbon to move from an animal to a car, what processes need to happen? Photosynthesis, combustion, and respiration? Respiration, fossilization, and photosynthesis? Fossilization, decomposition, and respiration? Or respiration, photosynthesis, and decomposition?
*March 18, 2014 by Anonymous*

**Science**

For carbon to move from an animal to a car, what processes need to happen? Photosynthesis, combustion, and respiration? Respiration, fossilization, and photosynthesis? Fossilization, decomposition, and respiration? Or respiration, photosynthesis, and decomposition?
*March 18, 2014 by Anonymous*

**Algebra 1**

Well we are doing factoring and I don't quite understand this problem: (x+1)(x-3)=117 I simplified and got: x^2-3x+x-3=117 x^2-2x-3=117 x^2-2x-120=0 I split the middle term and got: x^2-12x+10x-120=0 What should I do next? I have no idea how to finish factoring this... thanks...
*May 6, 2009 by Meloney*

**Chemistry II (College)**

How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) What will be the total gas pressure after 2.18 h? [...
*March 12, 2010 by Tim*

**Chemistry II (College)**

How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) What will be the total gas pressure after 2.18 h? [...
*March 12, 2010 by Tim*

**8H MAth**

factoring
*November 12, 2008 by Abbi*

**math factoring**

2h^2-h-3=0
*March 9, 2009 by Debbie*

**math factoring**

2w(4w+1)=1
*March 9, 2009 by Debbie*

**math**

n^2+8n+12 factoring
*October 18, 2011 by traci*

**mATH**

x^2+3x-4=50 how do i do this by factoring
*December 22, 2011 by ADAM*

**Chemistry**

H2O2 + Heat = H2O + O2 Would this be combustion or decomposition? Since the products are H2O and O2, I thought it would be combustion but then H2O can be decompose into H2O and O2 which would be decomposition.
*January 13, 2013 by Shadow*

**chemistry**

Solid sodium azide (NaN3) is used in air bags to fill them quickly upon impact. The solid NaN3 undergoes a decomposition reaction to produce Na(s) and N2(g). a. Provide the balanced equation for the decomposition of NaN3. b. What mass, in grams, of NaN3 is needed to fill the ...
*November 6, 2013 by Anonymous*

**Physical Science**

1) Carbon dioxide is obtain from the air and changed into carbohydrates oxygen during the process of fossilization. respiration. digestion. photosynthesis. 2) Which sequence of processes must occur for an atom of carbon to go from car to tree? respiration, decomposition. ...
*January 22, 2014 by Amber*

**chemistry**

Azomethane, CH3NNCH3, is not a stable compound, and once generated, it decomposes. The rate of decomposition was measured by monitoring the partial pressure of azomethane, in torr. Time (min) 0, 15, 30, 48, 75 Pressure(torr)36.2, 30, 24.9,19.3, 13.1 Determine the instantaneous...
*March 15, 2011 by Jazmin*

**Chemistry- Decomposition**

What is the decomposition of AgC2H3O2? AgC2H3O2->?
*November 29, 2010 by Marie*

**math algebra**

Part 1: Which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring and why? 1. −b 2. b2 − 4ac 3. 2a Part 2: Create your own quadratic equation. Using complete sentences, and your answer from part 1, determine whether ...
*August 11, 2010 by Ka'Sandra *

**math-factoring**

how do you factor this 8x^3+27
*November 6, 2008 by hailey*

**math (factoring)**

how do i factor: 4q² - 9r² ??
*February 21, 2009 by carolina*

**math**

how do you finish factoring 3x(x^2-2x-8)
*March 5, 2009 by Angie*

**math**

solve by factoring 6x - 5 = 6/x
*April 27, 2010 by Giselle*

**math**

factoring strategy 9x^2 + 4y^2
*July 26, 2010 by vera*

**math**

how do i solve by factoring x^4+2x^2y^2+9y^4
*September 22, 2010 by joe*

**math**

solve by factoring. x^2+5x+6=0
*January 13, 2011 by jenna d*

**math**

solve by factoring.. 3x^2+5x-2=0
*January 15, 2011 by tony*

**Math**

Solve by factoring: (2x+9)(x-6)=0
*February 8, 2011 by Jason*

**Math**

Will someone help me with factoring?
*May 2, 2011 by Diana*

**math**

Solve by factoring: 2a^2-3a= -5
*June 24, 2011 by Taina*

**math**

solve by factoring 2a^2+3=7a Thanks
*July 28, 2011 by Ashley*

**math**

Solve by Factoring 2a^2 - 3a = -5
*May 11, 2012 by kayla*

**Math-factoring**

factor 5m^2-m-20
*July 1, 2012 by Hank*

**Math**

Solve by factoring x^3-4x^2-3x+18=0
*October 6, 2014 by Han*

**Chemistry**

I need to write a balanced equation for this problem and am having difficulty doing so. The question is this: use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 is also a product of ...
*February 22, 2009 by Laura*

**math**

how do you integrate 30x^2/((x-2)(x+3)(x-5)) using partial fraction decomposition
*February 15, 2009 by Lauren*

**Chemistry**

What volume of nitrogen gas can be produced from he decomposition of 37.6 L of ammonia with both gases measured at 725 degree celsius and 5.05 pressure? In the reaction in 71 what total volume of gas at 667 celsius and 11.3 atm can be produced by the decomposition at 1.19 X 10...
*October 26, 2013 by Grace Peterson *

**math help**

I need help factoring this out 6a^2-5a+1 okay so now after revising (3a-1)(2a ) the last part i don't know how to actually get -5 and 1 Factoring is not my strong suit. However, by the term "+1", you know that both of the signs in your parenthesis are going to be the same (...
*March 2, 2007 by jas20*

**Chemistry**

How many half-lives have passed if 87.5% of a substance has decomposed? How many if 99.999% has decomposed? For 87.5% decomposition 1/8 is left. (1/8) = (1/2)^3 Three half lives is the answer Fot 99.999% decomposition, 10^-5 is left. Solve 10^-5 = (1/2)^n for the number of ...
*November 25, 2006 by John*

**math**

what is partial factoring and how do you do it? Please help
*September 14, 2007 by need help*

**math**

when is partial factoring used?
*January 24, 2008 by Lena*

**math**

4x^4-18x^2=0 solve by factoring
*August 25, 2008 by som*

**math: factoring**

how would i factor this 2x^2(p + q^3) - (p + q^3)
*March 20, 2009 by steven*

**Math**

Simplify by factoring. radical 90
*May 21, 2009 by Bryan Martin*

**Math-factoring**

I need to know how to do this. In steps 9x^2-3x 4x^2-9
*August 18, 2009 by Marcus*

**math**

Solve by factoring x^2+4x+5=0 need help
*May 28, 2010 by Ashley*

**math**

Help with factoring this one: x^9+1 (x^3+1) (x^3-x^3+1) Is this correct?
*October 31, 2010 by lomas*

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