Thursday

September 18, 2014

September 18, 2014

Number of results: 45,449

**urgent alg 1**

add or subtract 2 2 (2t -8t)+ (8t + 9t) second question 3 2 3 (t +8t ) + (-3t ) please helpp its urgent i have the answer butt im not suree pleasee helpp
*February 9, 2011 by kimberly*

**chemistry... HELPP**

What is the cell potential for the reaction Mg(s) + Fe^2+(aq) -----> Mg^2+(aq) + Fe (s) at 63 degrees celsius when [Fe^2+]= 3.30 M and [Mg^2+]= 0.110 M
*November 3, 2012 by Angie*

**chemistry... HELPP**

Place charges and electron dots as needed on each ion. As Se Br K Ca Ga. I answered: As3+ Se2- Br- K+ Ca2+ Ga2+ but i got it wrong so please helppp!!!
*October 7, 2012 by joane *

**Science chemistry**

It takes 1 hour and 17 min. for a 1.000gsample of a certain isotope to decay to 0.121g. What is the half-life of this isotope? plssss helpp
*September 24, 2012 by Shay*

**chemistry**

It takes 1 hour and 17 min. for a 1.000g sample of a certain isotope to decay to 0.121g. What is the half-life of this isotope? plssss helpp
*September 24, 2012 by Shay*

**CHEMISTRY HELPP!!!!**

which of the following is not highly ionic? BeO, BaO, CaO, SrO, MgO BeO has the least ionic character of those listed.
*April 24, 2007 by Robert R.*

**chemistry... HELPP**

Chemistry Equilibrium Constant PLEASE Help!? In an experiment, equal volumes of 0.00150 M FeCl3 and 0.00150 M NaSCN were mixed together and reacted according to the equation: Fe3+ (aq) + SCN– (aq) <--> Fe(SCN)2+ (aq) The equilibrium concentration of FeSCN 2+(aq) was 2.70...
*October 16, 2012 by LS*

**chemistry**

The concentration of NaOH in a solution is 7.00 10-6 M. What is the [H3O+] in the solution? _______________M What is the [OH-] in the solution? __________M What is the pH of the solution? What is the pOH of the solution? HELPP?? i don't understand any of this...
*December 22, 2010 by jim*

**Chemistry- helpp!**

The equation for synthesis of the poisonous gas COCl2 is CO(g) + Cl2(g)COCl2 If 43.2 kJ of energy is evolved when 39.5 g of COCl2 is synthesized, what is the molar enthalpy for this synthesis? THANK YOU!
*November 2, 2010 by Melissa*

**physics need urgent helpp**

i have tried everything, please helpp A snowmobile, with a mass of 530 kg, applied a force of 410 N backwards on the snow. What force is responsible for the snowmobile’s resulting forward motion? (Hint: Think action–reaction force pairs.) If the force of friction on the ...
*October 28, 2013 by iyzi*

**chemistry**

The reversible reaction n2(g) + 3h2(g)<-> produces ammonia, which is a fertilizer. At quilibrium, a 1-L flask contains 0.15 mol H2, 0.25 mol N2, and 0.10 mol NH3. Calculate K eq for a reverse reaction? Please HELPP!
*March 1, 2010 by anonymous*

**math helpp please!!!**

2Y-1 p-1 ----- - ---- 2y+5 p+3
*September 21, 2007 by Amy*

**math**

definition of area ??? helpp :/
*February 2, 2012 by s*

**Chemistry **

An unknown salt AS x XH2O was analyzed and found to contain 16.4 percent water. If the anhydrous salt has a formula mass of 183 amu, find the water of crystallization (X) for the hydrate. I have no idea how to figure this out! HELPP PLEASE!!
*January 23, 2011 by Mariana *

**chemistry... HELPP**

Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. It is also a component of cigarette smoke. Pyridine ionizes in water as follows: C5H5N + H2O<-->C5H5NH+ + OH- The pKb of pyridine is 8.75. What is the pH of a 0.190 M solution of ...
*November 30, 2012 by joane *

**chemistry... HELPP**

A gaseous reaction occurs at a constant pressure of 45.0 atm and releases 62.5 Kj of heat. Before the reaction, the volume of the system was 8.60 L . After the reaction, the volume of the system was 3.00 L. Calculate the total internal energy change in kilojoules.
*November 5, 2012 by Ann*

**math!**

how do yuo do lcm i know i did it in like 1st grade but i need helpp!!
*December 10, 2007 by bailey*

**9th grade**

find the unit rate 3 tablespoons for 1.5 serving how do u do it??? helpp thanks
*November 19, 2008 by kelly*

**geo HELP!!**

what are examples of formal economic activities? helpp plz and thanku :)
*February 26, 2009 by beecca*

**algebra**

evaluate the expression n + (-5) for each value of n. n=312 i dont know how to do this..please helpp..
*August 31, 2010 by paloma*

**Algebra2**

Helpp? Graphs of functions !! I need to determine if these are odd or even? 1. f(x)=x^5-x 2. f(x)=5 3.f(x)=x^4+2x^3
*August 29, 2012 by Unknown*

**simple easy math question PLEASEEE HELPP!!!**

is this true? log^2 x = (logx)^2
*January 6, 2011 by Sabrina*

** Biology **

Sponge bob notices that his pal Gary is suffering form slimotosis , which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that drinking Dr.Kelp will...
*September 5, 2011 by Aja *

**--->CHEMISTRY<--- HELPP**

(a)107.868 - (2.113e02) + (5.623e03) Calculator Result: 5519.568 Correct Result:________ * The correct result would be in .001, right? If yes, shouldn't it just be 5519.568??
*August 10, 2013 by Anonymous*

**Math**

Find all x, -4pi < x < 6pi, such that [cos(x/3)]^4 + [sin(x/3)]^4 = 1 PLEASEEE HELPP! :(
*May 27, 2008 by Megan*

**Literature**

I still havn't figured out where the exposition of The Miracle Worker is. Please helpp! Thanks -MC
*January 9, 2010 by mysterychicken*

**pre-algebra-mathhhh**

two fractions equivalent to the given factor 18/21 and the other 3/27:) please helpp
*January 26, 2011 by PLEASE HELP :)*

**SCIENCE. I NEED HELPP**

How do trees change the environment, making it less favorable for grass to grow?
*February 8, 2012 by A Girl.*

**trig. identities**

sin2x+sin2y=2sin(x+y)cos(x-y) Please helpp mee!! thank you sooo much really!!
*November 9, 2010 by Sabrina*

**MATH Is there no one who can helpp???????**

how do i simplify -9/2x^-3/2??? please help i dun need a answer necessary just an explanation is fine :)
*February 15, 2012 by Anonymous*

**science**

the making of polymers is an example of the category of work done by chemists calledd ________ fill in the answerr. please helpp!
*April 22, 2008 by christina*

**Science **

Cannabis tricks nerves in the brain into sending distorted messages. Which of the drugs effects on the body could this explain??? Helpp!
*October 22, 2010 by Anna*

**MATH**

HELP? Exam in 20 mins -dont' have any idea how to do this question; please helpp.. anyone! PLEAZE A.S.A.P. minimize p= 15x +18y subject to x+2y<=20 3x + 2y>= 36 x>=0 y>=0
*October 22, 2012 by GARNEL*

**I HAVE A MATH TEST TOMORROW HELPPP PLEASE!**

im not sure how to find the first four terms of each arithmetic sequence tn=4+(n-1)(3) helpp me pleasee!
*May 27, 2008 by Mandy*

**I HAVE A MATH TEST TOMORROW HELPPP PLEASE!**

im not sure how to find the first four terms of each arithmetic sequence tn=4+(n-1)(3) helpp me pleasee!
*May 27, 2008 by Mandy*

**algebra**

Find the x-intercept and the y-intercept of the graph of: 4x-2y=8 a. (2, -4) b. -4;2 c. (4, -2) d. 2;-4 I'm stuck between a and d. anyone helpp?
*November 30, 2010 by sonya*

**algebra 2**

Find the x-intercept and the y-intercept of the graph of: 4x-2y=8 a. (2, -4) b. -4;2 c. (4, -2) d. 2;-4 I'm stuck between a and d. anyone helpp?
*November 30, 2010 by sonya*

**Sciencee**

Whoopss! Okayy, So does a change in direction change acceleration? I think it does, But i'm not suree. Helpp! :))
*June 1, 2009 by Michelle<3*

**Algebra helpp i am going to fail**

The length of a side of a square is 3x+2 . What is the area of this square in terms of x ?
*February 28, 2012 by Cassie *

**Stupid Algebra**

13a squared times b(-4a cubed b cubed c) and no, I am not making this up. PLEASE HELPP POOPOO
*January 13, 2011 by Poopoo*

**math log PLEAseee helpp pretty please!!!**

determine the point of intersection y=logbase 10(x-2) and y=1-logbase 10(x+1)
*January 20, 2011 by Sabrina*

**Math **

Math - Tyler, Wednesday, May 14, 2014 at 2:51pm Solve (z +2)^ 4/3 = 4 where z is a real number please helpp
*May 14, 2014 by Anonymous *

**vocabulary**

i need to put 20 vocabulary words in a story helpp!!
*October 6, 2011 by love*

**math**

37 is what percent of 144, to the nearest percent? please helpp
*February 5, 2013 by Oscar*

**urgenttttttttttttttttt please helpp??**

how did the involvement of the u.s in the politics of southeast asia,korea, and vietnam impact the u.s political climate of the 1950's? any help is appriciated history is my worst subject
*March 7, 2010 by sam*

**sara**

which of the following is an example of capital? A. money in a Swiss bank account. B. a bulldozer C. a CD by Metallica D. a Dracula costume for Halloween not sure which one to choose? helpp
*December 10, 2010 by social studies*

**math,,,,helpp**

describe strategies you have found for deciding whether a fraction is between 0 ans 1/2 or between 1/2 and 1???????????????????
*September 10, 2013 by rosa*

**Chemistry**

Calculate the percent yield of iron if 950 g of Fe3O4 underwent the reaction shown in the chemical equation below and 533 g of Fe was isolated from the reaction mixture. Fe3O4 (s) + 2 C(s) ----> 2 CO2 (g) + 3 Fe(s) 1). 25.9% 2). 77.5% 3). 56.1% 4). None of the above. Based ...
*April 11, 2007 by Van jan*

**physics please helpp **

Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·108 N/m2
*October 25, 2011 by melisa*

**Probability Please helpp**

For each integer n ≥ 4, let an denote the base-n number 0:133n. The product a4a5 : : : a99 can be expressed as m/n! where m and n are positive integers and n is as small as possible. What is the value of m?
*November 24, 2011 by maria*

**Probability Pþease helpp**

Select numbers a and b between 0 and 1 independently and at random, and let c be their sum. Let A, B, and C be the results when a, b, and c, respectively, are rounded to the nearest integer. What is the probability that A + B = C?
*November 24, 2011 by maria*

**social studies**

Between 1850 and 1950 the productivity of the average American farm worker: A. declined B. remained about the same C. doubled D. quadrupled I'm unsure which choice to choose? helpp
*December 10, 2010 by sara*

**calculus**

limit as x approaches 2 where f(x)=5x-5 Find a δ such that | f (x) - 5 | < 0.01 if | x - 2 | < δ. (Give your answer correct to 4 decimal places.) Need helpp!!! I have no idea how to do it. and nobody that can help!!
*January 30, 2011 by kelly*

**Physics helpp**

Newtons 2nd law The force of earths gravity is about 10 N downward. Whats the acceleration of a 15kg backpack if lifted with a 15N force??
*May 14, 2013 by Kate*

**english**

In the memoirs, “Barrio Boy” and “No Gumption”, how are these two memoirs similar? How are they different? In what ways are the authors’ choices and depictions related to the subject matter of their stories? pleeeaaaasssseee helpp.
*December 13, 2010 by Vanna*

**MATH HELPP!!**

FRANCIS PACKED A BAG FOR HER VACATION.SHE TOOK 4 T SHIRTS,2 SWEATERS, 3 PAIRS OF JEANS, HOW MANY COMBINATIONS OF 3 COULD SHE MAKE USING EACH ITEM ONCE.MAKE A TREE DIAGRAM ---->>> THNX!!
*March 10, 2011 by alexis*

**Help!!!**

Caring,Responsibility,Effort, Respect,Honesty,and Choices..............What are they? Please Helpp!!!!!!!!!!! Could it be character traits? Political slogans? Abstract nouns? =) Words we can expect to be bombarded with every day from now until Nov 7th??
*September 6, 2006 by passion12*

**U.S.History**

In the Declaration of Independence what reference is there to Native Americans? What attitude toward Native Americans does this express? pleease helpp!!!
*January 25, 2009 by y912f*

**Math**

For math, I have to find the area of a hexagon when all I know is that each side equals x. I also know that I have to use 3 thereoms. HELPP!
*April 26, 2009 by Missmoo*

**math~ helpp pplease**

(3,5) is a point on the graph of y = f(x). Find the corresponding point on the graph of each of the following relations a) y=3f(-x + 1) + 2 what do I do with the negative sign before the x (-x)?
*November 24, 2011 by Jay*

**physics PLEASE helpp **

Find the net change in entropy when 213 g of water at 0.0°C is added to 213 g of water at 96.9°C.
*January 6, 2012 by melisa*

**math helpp**

8. Convert the scale to a unit rate. Show your work. Interpret the meaning of the unit rate.
*January 16, 2013 by tesj*

**Math**

Find sec θ and csc θ. If tan θ =3 and cos θ>0. Please helpp, i don't get identities
*February 6, 2013 by Oscar*

**calculus--please helpp**

if the line 3x-4y=0 is tangent in hte first quadrant to the curve y=x^3+k, find k. all i know is that its related to finding a derivative and i m basically completely lost....can please someone provide me some help?????
*October 14, 2011 by krishna*

**please help!**

How do you believe computer mediated communications may affect the future of human communications? PLEASE HELPP !!!!
*January 27, 2013 by Kate*

**please help!**

How do you believe computer mediated communications may affect the future of human communications? PLEASE HELPP !!!!
*January 27, 2013 by Kate*

**mathh helpp**

kathy will babysit !@#$%^& ctas. she charges $75 for the week for supplies and $8 for each hour,h,she works. write an expression for the total amount kathy charges. -->> THNX!!!
*March 6, 2011 by alexis*

**social studies 9 **

make five observations about life in the backwoods of upper Canada. what jobs did pioneers do for themselves that we would never think of doing for ourselves today? PLLEZZZ HELPP CAN YOU ANSWER IT I DONT NO WAT TO WRITE FOR THIS QUESTION
*December 30, 2011 by amy*

**ALGEBRA...[HELPP!!]**

Arianna kicks a soccer ball off the ground and in the air with an initial velocity of 42 feet per second. Approximately what maximum height does the soccer ball reach?
*September 16, 2010 by james*

**Debating**

i reallyy need helpp and sites with information on this question and im on the negtive side so im finding it pretty hard to find information on the question. Modern media is more manipulative than informative? plesee can anyone help.
*October 18, 2008 by hays*

**HELPP !!**

Copper(I) ions in aqueous solution react with NH3 according to Cu^+ + 2NH3 --> Cu(NH3)2^+ Kf=6.3x10^10 Calculate the solubility (in g/L) of CuBr (Ksp=6.3x10^-9) in 0.81 M NH3.
*May 10, 2012 by HELPP ! *

**physics please helpp **

A 1.67-kg block of aluminum at 21.7°C is to be melted and reshaped. How much heat must flow into the block in order to melt it? use the following values: For copper: c_copper=0.386 kJ/kg.K T_fusion=1359 K L_fusion=205 kg/K
*December 11, 2011 by maria*

**PreCalculus **

Write an equation to construct a function whose graph is like that of y=x^2, except for pieces removed for values between 3 and 5, and 8 and 9. I am not sure how to approach this question. Would I make a piece wise function? PLease helpp brains about to explode!
*July 24, 2011 by Alice*

**social studies**

what did freedom to former slaves and how did their lives change in the aftermath of the civil war? also could the federal government have done more to helpp southern africa americans after the civil war? please explain
*March 14, 2010 by Dellaine*

**physics**

A car starts from rest and reaches a velocity of 8 m/s in 4 seconds. a) What is its acceleration? b)If its acceleration remains the same, what will be its velocity in 15 seconds? plsss helpp meeeeeeeeeeeeeeeeeeeeeee
*December 7, 2011 by bella*

**Ap english **

I have to write an essay that compares and contrasts the rhetorical strategies of tone, lexicon, and syntax from two sermons given by the same person. How do i do this??? Helpp please!! (the sermons are called "Beauty of the World" and "Sinners in the Hands of an Angry God" by...
*November 1, 2009 by anonymous*

**physics**

Find the Magnitude of the force exerted by each cable to support the 625 N punching bag. One cable is connected to the ceiling with an angle of 37 degrees and the other cable is connected perpendicular to the side wall (Horizontal). HELPP
*August 9, 2012 by kacey*

**physics**

Find the Magnitude of the force exerted by each cable to support the 625 N punching bag. One cable is connected to the ceiling with an angle of 37 degrees and the other cable is connected perpendicular to the side wall (Horizontal). HELPP
*August 9, 2012 by kacey*

**physics**

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
*April 26, 2012 by Romy*

**physics**

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
*April 26, 2012 by Romy*

**ratio and proportions **

a fruit punch recipe calls for 3 parts of apple juice to 4 parts of cranberry juice . how many liters would be added to 4.5 L of apple juice?????? please helpp
*November 13, 2013 by rian*

**physics please helpp **

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the ...
*October 24, 2011 by maria*

**SCIENCE!!**

what is a fulcrum, the effort and the load? also what is a Class 1 lever, Class 2 lever, and Class 3 lever? plz helpp! thanks:)
*February 8, 2009 by beeca*

**physics to Elena please reply**

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
*April 25, 2012 by Romy*

**GERRRMAANN!**

I need help fixing these sentences, I'm supposed to conjugate the verbs and add an ariticle, pleasseee HELPP !: 1. Herr/Kommen/neun uhr 2. Wir/kenne/Computerspiele 3. Kaufen/ihr/Gitarre 4. Computer/sein/ganz neu 5. Wann/begginen/Film 6. Haben/anna/Schultasche Thankkkksss, Teutaa!
*March 17, 2009 by Teutaa!*

**Environmental Helpp!**

Why would a 1 L bottle of water cost $1.50 whereas 1 L of gasoline currently costs about 90 cents? Discuss our current consumption of bottled water with specific emphasis on its relatively cleanliness compared to tap water, where the water comes from, how it is regulated, and ...
*October 29, 2009 by Please Help*

**Helpp!!! physic...**

In the experiment Standing Waves,if you continue to lwer the water level after recording l(m) at the first sound resonance at fixed tuning fork frequency, you will hear the sound again but sound gets louder (second resonance). At this point, by what factor has l(m) increased? ...
*July 13, 2013 by khadijah*

**your preciouss helpp please**

how can you condense these cos^3x* cos2x^2 cos^3x+ cos2x^2 cos^3x- cos2x^2 Thank you soo much
*January 23, 2011 by Sabrina*

**ratio/proportions**

a geologist found that silt was deposited on a river bed at the rate of 4cm every 170 years , how long would it take for 5 cm of silt how long would it to be deposited ???? plz helpp
*November 13, 2013 by rian*

**HELPP math**

13,14,29,26,41,53,60,7,89,14 Based on the numbers above what is the variance and the standard deviation of the data set. I think 616.2 is the variance I think 24.83 is the standard deviation Am I correct????
*December 29, 2012 by Chris*

**CHEM HELPP!!!**

Imagine that you are in chemistry lab and need to make 1.00 of a solution with a pH of 2.50. You have in front of you 100 of 7.00×10−2 , HCL 100 of 5.00×10−2 , and NaOH plenty of distilled water. You start to add HCL to a beaker of water when someone asks you a ...
*March 10, 2009 by Ashley*

**Physics please someone help me**

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
*April 26, 2012 by Romy*

**physics HELPP!!!!!!!**

Two astronaut, as shown in the figure, each having a mass of 88.0 kg, are connected by a 10.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 6.00 m/s. By pulling on the rope, the astronauts shorten...
*November 14, 2012 by anon*

**Chemistry HELPP!!!!!!**

We did an experiment and I don't really know how to calculate this question. If you could show me how to do one, then I could do the rest. INFORMATION: HCl = 0.1404 M We placed 0.5 g Ca(OH)2 in 100 mL of the following solutions: Flask A: Distilled Water (8.5 mL of HCl needed ...
*March 26, 2012 by Myles*

**physics**

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m .. if needs values of these ( the speed of the wave is 58.77 m/s) (the ...
*October 25, 2011 by maria*

**Pre-Algebra: Help**

I have to do a webquest for pre-algebra and we have to make up a fundraiser thing, I need a list of things that one needs for a charity fundraiser, such as chairs, buffet tables, tables, tents, tablecloths. HELPP
*March 3, 2011 by Cheryl*

**Physics HELPP !!**

The antireflecting coating works best if its refractive index is the square root of the refractive index of the lens inthe eye glasses. a) determine the refractive index of the lens that gives the best results
*September 6, 2011 by Nelly*

**math helpp! :|**

in a bag of coloured cubes, the ratio of red cubes to total number of cubes is 5:7. If there are 105 cubes in the bag, how many cubes are red? i don't get this :|
*November 1, 2008 by jazz*

**chemistry!!!Need helpp!!!**

how do you find percent yield of a rxn, and how do you find mmol of something? percent yield = 100 * (actual yield/predicted yield) find the number of moles, and then conver it to milimeter. millimols = mols x 1000 OR mols = grams/molar mass OR millimols = milligrams/molar ...
*December 3, 2006 by day*

**helpp in physics! so tough!**

A diver springs upward with an initial speed of 2.0 m/s from a 2.5-m board. Find the velocity with which he strikes the water. Hint: When the diver reaches the water, his displacement is y = -2.5 m (measured from the board), assuming that the downward direction is chosen as ...
*September 28, 2010 by MC*

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