Friday

December 2, 2016
Number of results: 69,743

**Chemistry**

I am sooo confused on how to solve this problem, can anyone help me understand? calculate the pH of 0.10 M HCI solution?

*October 1, 2009 by Jessica*

**Chemistry(I'm sooo confused here!)**

The Rydberg equation, with n1=1, predicts an ultraviolet series of spectral lines of atomic hydrogen. Which of the following wavelengths is not predicted by the equation: 1/ = (1.097 x 10(7) m - 1) x (1/n1(2)-1/n2(2) a)182 nm b)103 nm c)97 nm d) 95 nm e) 91 nm I know i posted...

*November 4, 2010 by lavonne*

**SCIENCE**

CAN PARASITES BE ANIMAL LIKE PROTISTS AND FUNGI?? PLEASE HELP I AM SOOO CONFUSED WITH THIS???

*February 12, 2008 by Mackenzie*

**college algebra**

Solve the following inequality. x^3+9x^2-108 less or equal to 0. Then write your solution in interval notation. I am sooo confused and do not have any idea how to do this. Can someone please show me step by step please??? Thanks in advance. Someone who is confused.

*December 25, 2012 by allison-please help!!!*

**COLLEGE HELP LEASE PLEASE !!!!!!!**

Is graduate tuition is tuition for graduate school? I want to become a nurse. Graduate tuition Nursing $828.00 per credit But here the tuition is $17,166 The annual total list price cost to go to Mercy was $31,928 I'm sooo confused please help. Does it cost more than $31,928?

*February 22, 2016 by Sarah*

**math**

i also have a math test tomorrow and i get sooo confused with irregular shapes in geometry

*March 29, 2012 by Sheil*

**math 2 questions this time**

Find the area of the parallelogram. A height of 8 and a base of 24 then there is a another number I think its length but its 8 and im confused because its B*H for parallelogram sooo yea can someone help me and show me how. thanks. what is the surface area of the prism? There ...

*April 3, 2016 by LOVE PHINES AND FERB*

**Geometry**

Points EC bisects points AD at C. For each of the following, find the value of 'x' and the measure of the indicated segment. Please correct me if I'm wrong! 1. AC= 3x+6 and CD=2x+14 x=_______ AC=______ Answer: x=8 AC= 30 2. AC= 5x-8 and CD=16-3x x=______ AD=_____ Answer: x=3 ...

*September 6, 2014 by Anonymous*

**Quick math help**

Points EC bisects points AD at C. For each of the following, find the value of 'x' and the measure of the indicated segment. Please correct me if I'm wrong! 1. AC= 3x+6 and CD=2x+14 x=_______ AC=______ Answer: x=8 AC= 30 2. AC= 5x-8 and CD=16-3x x=______ AD=_____ Answer: x=3 ...

*September 7, 2014 by Anonymous*

**Chem**

balance the half-reaction. (Type your answer using the format CO2 for CO2, [NH4]+ for NH4+, and [Mg]2+ for Mg2+. Use the lowest possible coefficients.) I am sooo confused (a) S(s) --> H2S(g) thanks

*May 5, 2011 by Rebekah*

**ALGEBRA**

How do i do this?? i am sooo confused. can someone please help me?? Janet, Chrissy, and Jack want to divide their grocery bill evenly. They bouoght a apples for 90 cents each, b bananas for 60 cents each, and c cantelopes for $2.10 each. Write and simplify and expression ...

*September 24, 2008 by CLARISSA*

**Chemistry :( **

Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821 kJ/mol Calculate the standard enthalpy change for the following reaction: 2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s) _______kJ PLEASE EXPLAIN IM SOOO ...

*October 31, 2010 by Lucy*

**math**

one third of the people in a convention room are seated in three-fourths of the chairs. THe rest of the people in the room decide to stand. If there are 8 empty chairs, how many people are standing? Please fully explain because i am sooo confused!!!

*April 4, 2012 by Audrey*

**Geometry help**

Points EC bisects points AD at C. For each of the following, find the value of 'x' and the measure of the indicated segment. Please correct me if I'm wrong! 1. AC= 3x+6 and CD=2x+14 x=_______ AC=______ Answer: x=8 AC= 30 2. AC= 5x-8 and CD=16-3x x=______ AD=_____ Answer: x=3 ...

*September 7, 2014 by Anonymous*

**Chemistry**

Determine the mass of NH2CH2CO2Na and the volume of 0.150 M HCl solution required to make 1.35 L of a buffer solution at pH=10.75 and at a total concentration of 0.33 M. pKa(NH2CH2CO2H)=9.88. a.Mass of NH2CH2CO2Na: b. Volume of HCl solution: Hi Im sooo confused. 9.88=10.75+log...

*November 16, 2016 by J*

**Chemistry**

Determine the mass of zinc sulphide,ZnS which is produced when 6.2 g of zinc and 4.5 g of sulphur are reacted. This question is really confusing me, and I'm not sure where to start. I think I have to calculate the moles of each given reactant first in which case I have: nZn = ...

*October 17, 2010 by Dan*

**Chemistry**

What's the highest occupied molecular orbital of I-? I'm really confused here, I thought you could only find HOMO for the first two rows of the periodic table.

*April 5, 2010 by echem*

**Any chance I cud get Dog Training help on here???**

If any1 can help me with training my dog that would be FANTASTIC! I know "dog training" isnt a school subject but... i've looked everywhere for help & i cant afford a pro dog trainer. I also cant find any kind of free help..... Thank you SOOO much for ur help on this!

*January 2, 2016 by Scarlett*

**Algebra**

Im sooo confused!! can someone please help me step by step?? In a 4- team tournament, the winner gets 1/2 of the proceeds, the second-place team gets 1/4 of the proceeds, and the remaining proceeds are shared equally among the other two teams. Write the expression that shows ...

*September 18, 2008 by BOBBY*

**Algebra**

Im sooo confused!! can someone please help me step by step?? In a 4- team tournament, the winner gets 1/2 of the proceeds, the second-place team gets 1/4 of the proceeds, and the remaining proceeds are shared equally among the other two teams. Write the expression that shows ...

*September 18, 2008 by BOBBY*

**chemistry**

How many milliters of a 6.ooM HCl solution are required to react with 21.0 grams of Mg? I'm so confused. I know how to get the Molar mass of Mg and HCl but, does that even matter here?

*May 6, 2016 by christine*

**US History**

kay um. my teacher's not very good at teaching. great guy, but not meant to teach..sooo I have 6 questions that aren't even in the chapter and the index is of no help to me right now... sooo here goes: Describe the basic population structure and social life of the 17th century...

*August 21, 2008 by me*

**Math**

Prove that the following Trigonometric Identity is valid: 1/(sin(y)-1)-1/(sin(y)+1)=-2sec^2 (y) Please any help or clues on how to do this is needed. I have a sheet that tells me valid identities but nowhere on it has info on -2sec^2 (y) I am sooo clueless here :(

*June 7, 2016 by kat*

**chemistry**

the half-life of the reaction, at 34 degrees celsius and Ppan=13.2 torr, is 164.0hr. Calculate the rate constant for the reaction. confused on what to do here

*February 10, 2015 by mar*

**math**

I am supposed to use patterns or linear equation to fill in the graph but I just cant figure this one out.. can someone give me a hint or help me out on this on. p /2/88/8 /10 /? q/22/?/110/110/330 How can I use a linear equation or patterns when each there is not an equal ...

*September 20, 2009 by sam*

**chemistry**

(ppm and ppb are sooo not easy for me to get)c A saturated solution of PbCO3 contains 0.00011 g PbCO3 in 100. g of water. What is this concentration in parts per million?

*April 26, 2012 by john*

**Chemistry**

Okay, so here's the question: A 60.0 mL sample of 0.100M CH3COOH is titrated with 0.200M? What is the pH at each of the following points... After 30.0 mL of NaOH: This part...I'm getting confused on. I keep getting a number close to 13 and my friend is insisting that the pH is...

*October 19, 2011 by Anonymous*

**Chemistry**

I'm so confused!!!!!!!!!! I need to write out the equation for the reaction between (+)-tartaric acid and (+_)-1-phenylethylamine. I know tartaric acid is C4H6O6 and 1-phenylethylamie is C8H11N. Where do I go from here?

*October 27, 2008 by Andrew*

**Algebra**

I need help with this like really badly sooo yeahhhh:) here it is: Hugo withdrew some money from his bank account. He spent one third of the money for gasoline. Then he spent half of what was left for a haircut. He bought lunch for $6.55. When he got home,he had $13.45 left. ...

*August 22, 2012 by Emily*

**pre calc**

I am sooo confused on my homework. #1 Two cars lave an intersection at the same time. One is headed south at a constant speed of 30mph. the other is heading west at a constant speed of 40mph. Build a model that expresses the distance (d) between thec ars as a funtion of time (...

*September 18, 2012 by Rebekah*

**Chemistry CONFUSED**

Ok I'm really confused on the question I asked how many CO2 molecules can be made with 0.500 mol of oxygen atoms. Please help with setting this up

*September 29, 2011 by Monique*

**Chemistry **

Help please am kind of confused on this problem, am mostly confused on what state the products will be. Find net ionic equation? 2Al(s)+ 3CuCl3(aq)-> 2AlCl3(?)+ 2Cu(?)

*October 4, 2010 by John*

**chemistry**

Iron-59 has a half-life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new sample of iron? Show all calculations leading to a solution. I am really confused on how to find t here? Can someone help? I can set up the rest of the equation

*May 10, 2015 by Student101*

**Statistics**

Need major help on this one. Sooo confused... Binomial distribution to solve the problems. There is a 60 percent probability that a store will sell one of Red bags to any customer who comes into the shop and views the bags. Out of the next 7 people who come into the shop, what...

*August 24, 2008 by Student*

**Titrations (chem)**

In the titration of a 0.101 M sodium hydroxide solution, 19.02 mL of 0.130 M sulfuric acid solution was required to neutralize the sodium hydroxide in reactions that replace both hydrogen ions of the sulfuric acid. Calculate the number of milliliters of sodium hydroxide ...

*April 3, 2011 by Sarah*

**chemistry**

so i know that one mole is 6.022*10^23 particles in 12g of a carbon 12 isotope. im confused in finding the amount of moles in a particular substane. there is a formula that determines it, i think its n=m/M, yet im confused with what it means..

*May 19, 2010 by leana*

**Chemistry **

Help please am kind of confused on this problem, am mostly confused on what state the products will be. Find net ionic equation? I BELIEVE ITS BALANCED NOW. 2Al(s)+ 2CuCl3(aq)-> 2AlCl3(?)+ 2Cu(?)

*October 4, 2010 by John*

**Chemistry**

What would be the product of a reaction between methanal and pyrrolidine in acid? I know that normally a reaction between a carbonyl and a secondary amine would form an enamine. Here I am confused because there are no hydrogens that can be removed to form the enamine as this ...

*April 7, 2010 by Alice*

**Math**

ln(y-9)-ln7=x+lnx Thank you sooo much for helping:))))

*August 8, 2015 by Lucas*

**Chemistry**

What is the enthalpy change (in kJ/mol) for the following process? Na+(g) + Br-(g) --> NaBr (s) Hint: use the Born-Haber cycle Note: the reference state for Br2 is Br2(l) not Br2(g) Data (in kJ/mol): enthalpy of sublimation of Na(s): 107 standard enthalpy of formation of ...

*February 1, 2011 by Crystal*

**Science 8**

IN science we are talking about chemical prefixes and compound names. For homework there are some questions where I have to "Name the Ionic Compounds" He talked about it but I am still confused, here is one of the questions. ht tp*:/ / img101.imageshack.us/my. php?image=...

*December 17, 2008 by Micheal*

**Math**

Solve for y x-2y/5=3(y+2)/4 +3 This is what I did and I don't know if it's right or what to do next. Find the Lcd which is 20. I get: 4x-8y=15y+30=60 I don't know what to do from here. I'm so confused.

*August 24, 2010 by Laura*

**AP English**

What did the author intend to do with Adventures of Huckleberry Finn? Keep in mind I mean the AUTHOR (Mark Twain) not Huck...I'm just really confused by this question...I could say, "Write a novel about-insert plot here-. It outlined the values and society of the American ...

*September 2, 2012 by Joey*

**English THE GREAT GATSBY**

1. Fitzgerald creates purpose in Chapter 1. What was his purpose and how does he go about doing it? 7. Write a Gatsby-esque sentence. Make it colorful. My sentence is below... does it make sense? Life to some in New York may seem very Gatsbyesque, what with their tall ...

*November 26, 2012 by Andrea*

**Chemistry**

"Solid dinitrogen pentoxide is added to water." I got this as my answer: N2O5 + H20 -> 2HNO3. Do I need to break 2HNO3 apart since it's a strong acid? I thought it wouldn't since I thought it was a synthesis problem. I read online that this was the answer (N2O5 + H2O ->H...

*May 6, 2007 by Rachael*

**soical studies**

I need help checking my question. Explain why the Confederacy spared Washington d.c from being destroyed? my answer. Washington was surrounded by strong fortifications and was filled to the brim with Union troops and because they did it to scare the northerns to make them ...

*February 19, 2015 by dude*

**are these correct**

Here is the questions it says to simplify: xyy^2 x^3 and here is the answer x^4 y^3 ---------------------------- here is another one m^3 pmxm^2 x^3 p^5 and here is the answer m^6 p^6 x^4 ---------------------------- and here is another one xm^2 xm^3 x^3 m and here is the ...

*August 2, 2005 by Benita*

**Organic Chemistry**

I realize this is a general chemistry stoichiometry question, however I can not fully grasp it. I am supposed to calculate the theoretical amount (volume) of 3M sodium hydroxide (NaOH) needed to convert 1.5g of benzoic acid to its salt. I got 0.012 moles of bezoic acid present...

*January 20, 2011 by Me*

**English**

1. For here or to go? - For here. 2. Here or to go? - Here 3. Is this for here or to go? - For here. 4. Is this here or to go? - Here. (Which ones are grammatical?)

*March 25, 2014 by rfvv*

**Spanish-8th grade**

This is in regard to my earlier post about the conversation- Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother not the person but I'm ...

*October 12, 2011 by Marissa*

**mat 117/ algebra**

My question is about scientific notations. Here is the problem. What I need clarification on is the power signs. When to add, subtract or multiply? (2.4 x 10^-5)(4 x 10^-4) is the anwer 9.6 x 10^-9 or 9.6 x 10^20 The answer is NOT 9.6 x 10^20. Rember your rules of exponents: ...

*June 30, 2007 by Diana*

**chemistry**

I am a freshman in college, and am taking a placement test soon, but haven't seen chemistry since 10th grade. I'd appreciate any help I can get from anyone here to help me solve this problem: Hydrogen and sulfur chemically combine to form the gas hydrogen sulfide, according to...

*January 5, 2012 by John*

**history**

i need a thesis for a report about the problems in cuba, please help me!!! thanks sooo much!

*November 8, 2010 by amy*

**chemistry**

I'm kind of having difficulty with a question involving dimensional analysis. I'm confused how I would convert some units into others and what to divide. Here's the question. One 5lb Hershey's kiss is equivalent to how many little Hershey's Kisses? (1 Hershey Kiss is equal to ...

*October 30, 2010 by Nick*

**Chemistry**

Sorry still confused. Here's the problem: 0.249g of a diatomic element occupies a volume of 125mL at 120 degrees Celsius and 2.00 atm. This element IS? I used PV/RT =n so: 2.00 atm (.125L)/0.0821L*atm/mol*K (393K) = 11.96 then 0.249/11.96 =20.1 which is Neon. It isn't diatomic...

*December 8, 2011 by Lisa*

**chemistry**

so here i am doing my hw worksheet on the ideal gas law/ghram's law ad i have gotten to this one problem where i am totally stuck and confused. Please help me by telling me how to set this up and giving me tips, if necessary. What is the mass(in grams) of ammonia gas(NH{tiny #...

*January 11, 2010 by hellogoodbie *

**chemistry A level**

hello my teacher has really confused me. can anyone tell me how you can figure out the shapes of molecules and what types of shapes there are??? i am really confused! thankyou xxxx

*December 5, 2008 by yasmin xx*

**PreCalculus**

i am confused about what approach to take for (limit as x goes to 0) of (ln(1+x))/x if i had x going to infinity, i could do l'hospitals, but here?

*December 9, 2009 by Kay*

**chemistry**

so here i am doing my hw worksheet on the ideal gas law/ghram's law ad i have gotten to this one problem where i am totally stuck and confused. Please help me by telling me how to set this up and giving me tips, if necessary. What is the mass(in grams) of ammonia gas(NH{tiny #...

*January 11, 2010 by hellogoodbie *

**chemistry**

So here I am doing my HW worksheet on the ideal gas law/graham's law ad I have gotten to this one problem where I am totally stuck and confused. Please help me by telling me how to set this up and giving me tips, if necessary. What is the mass (in grams) of ammonia gas (NH {...

*January 11, 2010 by hellogoodbie *

**English-Urgent please!**

What phrase structure rule creates coordinate structures? I am confused here. Is it prepositional phrases?

*December 21, 2013 by Student*

**integration by parts**

s- integral s ln (2x+1)dx ? = ln(2x+1)x - s x d( ln (2x+1)) = ln(2x+1)x- s x [(2x+1)'/ (2x+1)] dx = ln(2x+1)x- s x [(2)/ (2x+1)] ?... then i'm confused... "ln(2x+1)x- s x [(2)/ (2x+1)] ?... then i'm confused..." x [(2)/ (2x+1)] = 2x/(2x+1) = (2x+1-1)/(2x+1) = 1-1/(2x+1) B.t.w...

*February 17, 2007 by nicholas*

**English**

1. She was confused at his error. 1-2. She was confused by his error. 2. He was confused about something. 3. He is confused in mind. (Are they all grammatical? Which prepositions are commonly used?) 4. That is very confusing to the public. 5. That is very confusing for the ...

*April 4, 2016 by rfvv*

**trig. identities**

sin2x+sin2y=2sin(x+y)cos(x-y) Please helpp mee!! thank you sooo much really!!

*November 9, 2010 by Sabrina*

**Algebra**

(3x^2+2)/(x^2-4)-(9x-x^2)/(x^2-4) Your problem: (3x^2+2)/(x^2-4)-(9x-x^2)/(x^2-4) Since the denominator is the same, just subtract the numerator: (3x^2 + 2 - 9x + x^2)/(x^2 - 4) -->remember to use the distributive property with the negative over the terms in the numerator ...

*July 19, 2007 by Sara*

**Chemistry**

Please help me with this question: Calculate the theoretical yield amount of CaCl2 that would be required to change the temp of 50ml of water from room temp 20degree to 45 degrees. Heat Capacity H20 is 4.184 Jg^-1deg^-1 and density is 1g/mL. I've already calculated: Q=mc delta...

*March 7, 2011 by Selena*

**2nd grade math**

Please help. I'm confused here's an example: 38+45=? Show how to make one added the next tens number?

*November 3, 2016 by Math*

**Grammar and Composition**

Hi, Can someone please read my huge post below and complete the last part for me (it is to be done by an adult), thank you sooo much!

*May 14, 2010 by y912f*

**Math (pre-algerbra)**

I've tried this sooo many times I have huge marks on my paper and I just can't figure it out: 3a/8-a/12+7/2=7

*May 9, 2011 by Sammy*

**Chemistry*Dr.Bob**

I keep finding all sorts of different enthalpy of vaporizations for bromine. I used: 254.66 So factoring 254.66/2 into my equation below i ended up with a lattice energy of -863.33. Can you confirm this? ____________________________________________________________ What is the ...

*February 2, 2011 by Crystal*

**chem**

Oh Dr.BOB...I am so lost..and sooo frustrated. Can you explain to me how to balance a chemical equation one more time please. Thanks Stacey

*May 11, 2010 by Stacey*

**algebra**

Verify that the functions f and g are inverses of each other by showing f(g(x)) = x and g(f(x)) = x f(x) = x^3 + 5 g(x) = 3sqrtx-5 ( 3 is inside check mark on the sqrt. I am sooo totally lost on these!

*December 18, 2011 by Alissa*

**Chemistry**

Please help me with this question: Calculate the theoretical yield amount of CaCl2 that would be required to change the temp of 50ml of water from room temp 20degree to 45 degrees. Heat Capacity H20 is 4.184 Jg^-1deg^-1 and density is 1g/mL. I've already calculated: Q=mc delta...

*March 7, 2011 by Selena*

**honors algebra II**

factoring:: i factored 15A^2B - 10AB^2 into... (15A - 10B)(15A + 10B) am i doing it correctly? because im pretty confused. thanks :] No, you are confused. This is not a difference of squares. Neither the first term or the last is a perfect square. Here, there are common ...

*January 15, 2007 by mia*

**biology**

okay im totally lost here, the question i need to answer is explain why codons can't consist of two bases instead of three for each amino acid. im so confused..help!

*January 6, 2008 by Kaitlyn*

**engineering**

Hey everyone! I have an exam on Monday and I want to know what I should do for this. Explain the sources and implications of size effect in strength of materials. Thank you sooo much ! :)

*November 29, 2014 by Ivana*

**Physics**

A 30 ohm resistor is connected to a 1.5 V battery. How much power is dissipated by the resistor? I'm confused of the formula to use here.

*December 11, 2014 by Frank*

**math**

solve for x and y when 5x-3y-2=0 and 7x+y=0. Please this is sooo hard. no clue how to do it. please show me how to do it.

*February 16, 2009 by neil hannit*

**math**

thank you so much reny! but i was wonndering how can you factor x8-2x6+x5+x4-x3+x+1 by x3+1 THANK YOU SOOO MUCH!

*October 6, 2010 by Sabrina*

**Geometry**

Solve for x. x(x+3)=2^2 I think I'm doing this all wrong. Here is the work I've done so far: x^2+3x=4 x^2+3x-4=0 ...now what? i started trying to use the equation x=-b sqrt of (b^2-4ac) but I'm just getting confused...

*May 16, 2009 by Anonymous*

**Geometry**

Solve for x. x(x+3)=2^2 I think I'm doing this all wrong. Here is the work I've done so far: x^2+3x=4 x^2+3x-4=0 ...now what? i started trying to use the equation x=-b sqrt of (b^2-4ac) but I'm just getting confused...

*May 16, 2009 by Anonymous*

**Physics (SO CONFUSED!!!)**

I think I'm using the wrong formulas or SOMETHING... Here's the question: "Two equal charges are separated by 3.7 ´ 10^-10 m. The force between the charges has a magnitude of 2.37 ´ 10^-3 N. What is the magnitude of q on the charges?" Here's my work: F = kc(q1q2/r^2) 2.37 x ...

*May 7, 2009 by Judy*

**Chemistry 111**

A gas occupies a volume of 256mL at a pressure of 250torr at 32 degrees Celsius. Calculate the pressure (in atmosphere)if the volume is reduced to 156mL and the temp is increased to 62 degrees Celsius. I really need the formula that I would be using. I am confused because ...

*December 3, 2010 by Lotty*

**Science....**

Look at my previous post.... Can anyone please answer my science question??? well what's the question? http://www.sinauer.com/cooper/4e/chapter10.html Well, did u look at my previous post??? Hey Lance!! Thanx sooo much!! I got the problem right! I owe u one! Hey Lance!! Thanx ...

*February 22, 2007 by jk1115*

**Math College**

A 6-sided die is rolled 14 times. What is the probability of seeing a "6" at least 2 times? I am sooo clueless please help!

*November 7, 2011 by Adrianna*

**5th grade**

I'm Pretty Confused About This.... Has Something To Do With Bar Graphs?! Here's The Question: Is A Data File Needed To Make A Bar Graph?

*December 9, 2008 by ...*

**chemistry**

For Hg2+(aq) + 2e -> Hg(l) E=0.851 V This means that: A) Hg(l) is more readily oxidized than H_2(g); B) Hg^2+(aq) is more readily reduced than H^+(aq) C) Hg(l) will dissolve in 1 M HCl D) Hg(l) will displace Zn(s) from an aqueous solution of Zn^2+ ion ~~~~~~ Sooo...this ...

*March 31, 2009 by someone*

**government**

I am really confused with this part of my homework. Mrs. Sue please help me. OK here is my question: Why do you think free enterprise and capitalism usually develop as economic systems under democracy?

*September 13, 2014 by Katey*

**history-Civil War**

Sorry Sra...your sites didn't help..i was in sooo many sites last two days...no discussion found on this question..you don't know the answer to this ?

*June 11, 2011 by Joanne*

**Math**

Can someone please help me figure out the mean, standard deviation, raw score, and z-score of 27,3,4,16,0.. Any help is super appriciated.. thanks sooo much.

*October 3, 2011 by Mark*

**Algebra (Re.: Reiny)**

The fact that there was that nice symmetry to the question, makes it easier than it first appears. I had it as: (a/b + b/a)÷(b/a - a/b) look at (a/b + b/a) the common denominator for this would be ab, so a/b + b/a = (a^2 + b^2)/ab similarly for (b/a - a/b) the common ...

*July 20, 2007 by Sara*

**Math **

I am trying to figure how to solve this but I am totally confused? Can someone help explain this to me? y + x = -6 I know the formula to use is y=mx+b but just not to sure how to work the problem out so I can graph this? Have any suggestions for me? Would love to here them. ...

*December 2, 2010 by Nikol *

**PreCalculus**

I'm so confused... I've always been good at math but this year I'm just not getting it. But I know i can I always get help and a REAL explanation from the people on here so... A steel drum in the shape of a right circular cylinder required to have a volume of 100 cubic feet. (...

*October 6, 2008 by Samantha*

**English Expressions**

Here you are. Here it is. Here they are. Here you go. There you go. ------------------------- Are all the expressions can be used when we hand something to another? Are they the same in meaning?

*January 15, 2008 by John*

**Chemistry **

A student mixed 15.0 mL of a solution of 0.0200 M ferric chloride FeCl3, with 25.0 mL of water. Calculate the moles of iron ion, Fe +3 in the resulting solution. (I think this is a Dilution problem, but I wasn't really sure how to start it out. Any help would be greatly ...

*January 23, 2012 by S*

**Calculus-Rationalizing Denominator**

I am very confused on how to rationalize a denominator, it just gets harder and harder.*will be using the V symbol again as a square root symbol.* I get how to rationalize something simple as V2/V7, I would get V14/7 as the answer, but I get confused on how to solve 1/V6 +2, ...

*October 3, 2011 by -Untamed-*

**Calculus**

Got a midterm worksheet. Realized how confused I am. Here are some questions: lim x^3 + 12x^2 - 5x/5x x->0 Find the indicated limit: lim 11x/absolute value x x->0+

*January 19, 2009 by Jane*

**English**

I don't understand the question???? Can somebody give an example. Complete the chart below with the present simple tense, using the verb ‘go’: PERSON I you he/she/it We you they POSITIVE I live here We eat here. QUESTION When did you move here. What do they eat. NEGATIVE ...

*October 23, 2008 by Tony*

**English**

I don't understand the question???? Can somebody give an example. Complete the chart below with the present simple tense, using the verb ‘go’: PERSON POSITIVE QUESTION I I live here When did you you We eat here move here he/she/it What do they eat We you NEGATIVE they He ...

*October 23, 2008 by Tony*

**English**

I don't understand the question???? Can somebody give an example. Complete the chart below with the present simple tense, using the verb ‘go’: PERSON I you he/she/it we you they POSITIVE I live here We eat here QUESTION When did you move here What do they eat NEGATIVE He ...

*October 23, 2008 by Tony*