Saturday

November 29, 2014

November 29, 2014

Number of results: 91,073

**chemistry-Please confirm this**

I'm pretty sure that OH- has a bond order of 1. OH+ has a bond oder of 1. confirm this please.
*May 25, 2008 by Tom*

**Chemistry**

Does SF5 exhibit hypervalency? I believe yes as it has an extended octet...please confirm this for me, thanks for your help!
*September 28, 2011 by Cassie*

**Chemistry**

Find the pH of 1.0E-8 M H2S04 (H2SO4 <==> 2H^+ + SO4^2-) I have got answer to be 7.70, can you confirm the answer for me please? If it is not good, i'll be very grateful if you could leave some guides.
*September 6, 2014 by Matt*

**Chemistry**

At a certain temperature, the Kp for the decomposition of H2S is 0.832 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.121 atm in a closed container. what is the total pressure in the container at equilibrium? Please tell me how to do it ...
*March 9, 2012 by Kylie*

**Chemistry**

At a certain temperature, the Kp for the decomposition of H2S is 0.832 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.121 atm in a closed container. what is the total pressure in the container at equilibrium? Please tell me how to do it ...
*March 9, 2012 by Jerry*

**Chemistry - PLEASE CONFIRM ANSWER.**

determine the mass of CO that is produced when 45.6g of CH4 react with 73.2g of O2. 2CH4 + 3O2 ---->2CO + 4H2O nCH4 = 45.6 g/16.05 g/mol =2.84 mol nCO=2.84 mol mCO=n*M =2.84*28.01 =79.5 grams
*May 25, 2008 by Nicole*

**calculus derivatives**

Please confirm: {(5x+2)^4/x^2-3x+1)^3}= 20(5x+2)^2(x^2-3x+1)^3 -3x^2(5x+2)^4 (x^2-3x+1)^2/(x^2-3x+1)^6
*July 19, 2012 by Laurie*

**Computer science**

Hi, Can someone please confirm the following for me .. This realtes to PSK or phase shift keying. Is it right that 8PSK uses eight different phase shifts each representing one of the eight patterns of three bits ... ?? Does it ehn follow that 256PSK uses 256 different phase ...
*April 3, 2011 by Oddie*

**Chemistry**

How do we use 2 indicators to confirm the pH of a solution?
*November 4, 2014 by John*

**Physics/Boyles Law**

Please confirm/tidy up my fragile understanding as follows: Boyles Law is apparently now known by another name???? If I compressed the air in a room into a cylinder obviously everything that was in the room is now in the cylinder including the heat. As the heat out of a large ...
*October 12, 2007 by Mike*

**Chemistry -Please help! **

Using MO theory (but w.o drawing a MO diagram) predict whether HHe or HHe+ would be more stable. I believe HHe+ would be more stable as the bond order would be 1 (i.e. BO=(2-0)/2) while BO for HHe is 1/2. Please confirm! thanks!
*September 28, 2011 by Cassie*

**Differentiation**

Could someone confirm that the derivative of: ln(2x) is: 1/2x No answers please, just yes or no. Thanks if u= 2x d/dx ln u= 1/u du No. if u= 2x d/dx ln u= 1/u du No. Got it, thanks.
*June 30, 2007 by CharlieGolf*

**Pre-Calculus**

How do you confirm that f and g are inverses by showing that f(g(x))=x and g(f(x))=x ? Problem: f(x)=3x-2 and g(x)= x+2 --- 3 Please help, don't know where to begin?
*September 16, 2008 by House*

**algebra**

What is 4,756 divided by 32? I got 148.625 please confirm?
*March 17, 2011 by Jeannie*

**Chemistry**

At 389K, this reaction has a Kc value of 0.0682. 2X(g) + 2Y(g) <-> Z(g) .. Calculate Kp at 389K. Kp= this is what I did.. can somebody confirm or find any mistakes in my thought process? Kp = Kc(R)(T)^Delta n Delta n = (1)-(2+2) = -3 Kp = (0.0682)(0.08206)(398K)^-3 = 0....
*March 5, 2012 by Tracy*

**Chemistry**

Dr Bob Can you please confirm for me that only NH3 has a boiling point that does not fit the general trend from these choices NH3 PH3 SbH3 AsH3 many thanks andy I am picking NH3 because of the reason that the larger the compound the greater the boiling point Am I right with my...
*May 11, 2010 by Andy*

**Chemistry**

Are there any chemical reactions or observations that involve sodium hydroxide or any other bases, but cannot be used to confirm its basic nature?
*November 16, 2014 by John*

**Chemistry**

What is the pH of a solution prepared by dissolving 1.23g of 2-nitrophenol (FM 139.11) in 0.250 L? Well so, i calculated the no.moles of 2-nitrophenol, and divided it by 0.250, to get the molarity which was 3.53E-2. Since the molar ratio of dissociation is 1:1, i assumed [H+] ...
*August 31, 2014 by John*

**Algrebra**

How do you insert grouping symbols to make this equation true? 14 divided by (5+2) +8=10 14/7=2+8=10 Please confirm, I really have an issue with Algebra
*March 20, 2011 by Jeannie*

**Chemistry**

How do I know which of these .1M solutions will have a pH less than 7? KF, NH4I, NaH2PO4, Fe(NO3)3 I am guessing all but KF is acidic...but if someone could confirm this and explain why that would be helpful
*February 24, 2010 by Mark*

**Chemistry**

which of the following compounds dissolve in water?? -Sodium Nitrate (NaNO3) - Sucrose (C12H22O11) - Sodium Chloride (NaCl) - Potassium Sulfate (K2SO4) - Ethanol (C2H5OH) - Sodium Bicarbonate (Baking Soda)(NaHCO3) - Calcium Sulfate (CaSO4) i did an experiment, but I was not ...
*September 25, 2009 by Liz*

**chemistry**

can someone confirm that the functional group of cocaine is the ch3n group. thanks
*January 11, 2009 by Valerie*

**chemistry**

A reaction has ÄH = -378 kJ and ÄS = -37 J/K. Calculate ÄG at 25°C to confirm that the reaction is spontaneous. in kJ
*May 15, 2012 by maddy*

**Chemistry**

Using MO theory (but w.o drawing a MO diagram) predict whether HHe or HHe+ would be more stable. I believe HHe+ would be more stable as the bond order would be 1 (i.e. BO=(2-0)/2) while BO for HHe is 1/2. Please confirm! thanks!
*September 28, 2011 by Cassie*

**chemistry**

Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) -----> PCl3 (g)+ Cl2(g) Kc= 1.80 at 250 degrees C A 0.463 mol sample of PCl5(g) is injected into an empty 4.80 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g...
*March 9, 2012 by Sarah*

**Stats**

Think I know the answer, but can someone please confirm... Find the value of a that corresponds to a confidence level of 84%. Answer: 0.16???
*September 13, 2008 by Cassy*

**algebra**

is there even a solution to this problem: x^2 − 10x + 20 = 0 I think this answer is no solution , please confirm I am right...
*October 21, 2013 by Anonymous*

**Chemistry**

Can someone confirm that I'd be doing this right? If an 0.520 m aqueous solution freezes at -3.00 C, what is the van't Hoff factor, i, of the solute? It says I can find the Kf values on a table. I had no idea which Kf value to use... so i just used water... is that right? If ...
*February 16, 2012 by David*

**Algebra**

Write 27/4 as a mixed number, I keep getting 6.75 but it does not seem correct, please confirm if it correct or if I am missing something.
*March 19, 2011 by Jeannie*

**math**

please confirm this answer also: [(4+20)/(4*2)]+[(2*8)/4]=7 is the answer 7?
*October 22, 2013 by Anonymous*

**alegbra**

Which of the following are examples of inferential statistics? Check all that apply. A.Finding the average (mean) of a set of numbers B.Testing every lightbulb produced by a company to confirm that each one works C.Testing random samples of lightbulbs produced by a company to ...
*April 17, 2012 by daryl*

**CHEMISTRY HELLPPPP**

WHich of the following elements are semiconductors? Ge, Si, Te, Po, S, Al, Se, Ca i believe only Ge, Si, Te, and Se are semiconductors, can someone confirm this? did i miss or over look something
*April 22, 2007 by Anonymous*

**Maths-Vectors Help!**

Please help confirm if I got this problem correctly; 1)2jx(3i-4k) sol>> 2x3jxi - 2x4jxk = 6jxi - 8jxk = 6k - 8i 2) (i-2j)xk Solutn>> ixk - 2jxk = -j - 2i 3) (2i-4k)x(ix2j) solutn>>2ixi Please do help with this ONE yes, correct. On the third, break recheck if ...
*April 16, 2007 by Segun*

**Chemistry**

What is the net ionic equation of reaction of MgCl2 with NaOH? I got the equation and then balanced it and then omitted the spectator ions and ended up with: Mg(OH)2(aq)--->Mg(OH) (s) I wanted to confirm to see if that was correct, thanks.
*September 26, 2012 by M*

**chemistry hw**

SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied ...
*February 19, 2012 by Ariel*

**Algebra**

Please confirm if I did the follow problems correctly: A) Find the sum or difference. (5a – 3b) + (2a + 6b)= 7a + 9b Answer: = 7a + 9b B) Let’s work a few of these (FOIL) 1) (x+2) (x+8) = x 10 Answer: x10 2.) (x+5) (x-7) = x + 11 Answer: x + 11 3.) (2x+4) (2x-3) = 4x + 7 ...
*April 3, 2011 by Jeannie*

**Algrebra**

Please confirm if I did the follow problems correctly: A) Find the sum or difference. (5a – 3b) + (2a + 6b)= 7a + 9b Answer: = 7a + 9b B) Let’s work a few of these (FOIL) 1) (x+2) (x+8) = x 10 Answer: x10 2.) (x+5) (x-7) = x + 11 Answer: x + 11 3.) (2x+4) (2x-3) = 4x + 7 ...
*April 3, 2011 by Jeannie*

**Business Math**

Please confirm if I did this correctly: What is the Principal? Principal $21250 X 10% 2,125 What is the total amount paid by the consumer? 2,125 x 3.5 years 7,437.5 +21,250.0 28,687.50
*June 4, 2011 by JC*

**Navigation/maths**

I am curious to know what "sight reduction tables" are: I assume they give distance and bearing (azimuth) from one known (or assumed)location on the surface of the earth to another to the accuracy of the tables. Please can someone confirm or correct my assumption. Thanks Mike
*January 11, 2008 by Mike*

**Math - check answer**

Given v = 4t - 9t3, find the acceleration when t = 1 s. acceleration in m/s2 = My Answer V'=4-27t2 V"= -54t V"(1)= -54 acceleration in m/s2 = positive 54 Can you please confirm this is correct???? Thanks
*January 29, 2013 by Brownie*

**Chemistry**

The value of delta H for the reaction below is -1107kj. 2Ba (s) + O2 (g) -> 2BaO (s) How many kJ of heat are released when 5.75 g of BaO (s) is produced? Here is how I approached this problem: 1. Converted 5.75 g of BaO to mol: 5.75g x (1mol BaO/153.3g BaO) = 0.0375 mol BaO...
*May 23, 2011 by Thao*

**Math - check answer**

Given v = 2t3 + 87t2 - 636, determine the acceleration for t= 1 s. acceleration in m/s2 = My Answer v'= 6t^2+174t V"= 12t V"(1) = 12 acceleration in m/s2 = 12 Can you please confirm this is correct.. Thanks!
*January 29, 2013 by Brownie*

**Math - check answer**

Given s = 4t + 11t3, find the velocity when t = 1 s. velocity in m/s = My Answer: S'=4+33t^2 =4+33 =4+33 =37 velocity in m/s = 37 Can you please confirm this is correct. Thank you
*January 29, 2013 by Brownie*

**Math for Educators**

24five x 3five ------ 132five 27eight 65eight +43eight ------- 157eight 75eight -37eight ------- 36eight 1213five/3five??? -If someone could please confirm my answers for the others as well as help me with the last division problem thank you! these are all equating in ...
*June 17, 2013 by Kelly*

**chemistry**

This is an assesment question and im really bad at these, i did the first two questions and now i am stuck. They ask you to design a series of experiments that can be used to confirm the structure and organization of the table of relative strengths of acids and bases. the want...
*November 24, 2012 by Tara*

**Math**

A particle is projected along an inclined plane with a velocity given by the formula v = 4.4t2 + 10.1t -23.2. Determine the acceleration of the particle when t = 1.5 s. acceleration in m/s2 = My Answer V'=8.8t+10.1 V"=8.8 V"(1.5)= 8.8 acceleration in m/s2 = 8.8 Can you please ...
*January 29, 2013 by Brownie*

**accounting**

The auditors may decide to confirm accounts payable on an audit engagement. Describe two reasons why the confirmation of accounts payable is not a genreally accepted auditing procedure, describe the audit crcumstances in which the auditors are likely to decide to confirm ...
*June 7, 2009 by kew*

**Math**

For a track and field athlete who can jump vertically, his distance above the ground is given by the formula s = 3.3t - 4.9t2. What is his initial velocity? velocity in m/s = My Answer S'= 3.3-9.8t S'(0) = 3.3 velocity in m/s = 3.3 Can you please confirm this answer Thanks
*January 29, 2013 by Brownie*

**ENGLISH: types of business writing**

Can someone check gammar, punctuatiion and structure please. Draft an email of at least four complete sentences to Deb Walker the designated trainer: Confirm the arrangements for the seminar providing only the information she needs to arrive at the right place at the right ...
*April 4, 2012 by danny*

**Mathematics**

Hi, Can someone check this for me .. please A tuning fork has a wavelength 0f 136 centimetres. Given that the speed of sound is 340 metres per second what is the frequency of the tuning fork ?? Frequency = speed / wavelength Then 340 / 1.36m (136cm) = 250 Hz Thank you try to ...
*May 28, 2011 by Alan*

**chemistry**

When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? (Use data from table 20.1, and Appendix D page A28-A29 in Petrucci) 1. ) Mn(s) 2. ) MnCl2(aq) 3. ) KMnO4(aq) 4. ) MnO2(s) the answer i got was MnCl2,,,,but im not sure if its right...
*December 1, 2009 by mandeep*

**Science**

What Temperature would you get after the First 5 Minutes of Putting 4 Ices into a 99 degree warm water? After The Second 5 MInutes? YOu Might need to do this experiment at home. But May anyone Please Help and tell me it in Farenheit so i can confirm my Answers.
*December 13, 2011 by Science*

**science**

which of the following has both dispersion forces and dipole-dipole forces? Br2 HCl H2 CO2 BCl3 I reckon its HCl can anyone confirm please
*May 11, 2010 by Anonymous*

**chemistry**

When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? (Use data from table 20.1, and Appendix D page A28-A29 in Petrucci) 1. ) Mn(s) 2. ) MnCl2(aq) 3. ) KMnO4(aq) 4. ) MnO2(s) the answer i got was MnO2,,,,but im not sure if its right......
*December 2, 2009 by mandeep*

**calculus II**

I have the function f(x)=e^x*sinNx on the interval [0,1] where N is a positive integer. What does it mean describe the graph of the function when N={whatever integer}? And what happens to the graph and to the value of the integral as N approaches infinity? Does the graph ...
*February 24, 2010 by Paul*

**Statistics**

Dear Lee, Please confirm these answers to this question. your medical terminology instructor listed the following grades for the class out of a 75 point test: 33,34,43,45,45,54,55,59,60,62,64,66,67,68,67,68,68,69,70,70 a.find the 90th percentile b. your score was 59, what is ...
*November 3, 2013 by Ben*

**chemistry**

Given the thermochemical equation SO2(g) + ½ O2(g) ---> SO3 (g) DH = -99.1 kJ calculate the enthalpy change (DH) when 89.6 g of SO2 is converted to SO3. 1. 69.3 kJ 2. -111 kJ 3. -139 kJ 4. 139 kJ 5. -69.3 kJ i got -139 kj but im so unsure may some one confirm it for me?
*November 24, 2009 by paneet*

**Math - check answer**

Given s = 10 - 10t2 + 45t3, determine the velocity when t = 1 s. velocity in m/s = My Answer S'= 0-20t + 135t^2 S'(1) = -20+135 = 115 velocity in m/s = 115 Can you please confirm this is correct. Thanks!
*January 29, 2013 by Brownie*

**Calculus**

int(dx/(x^2+9)) u = x/3 Use the indicated substitution (above) to evaluate the integral. Confirm answer by differentiation. Okay, so I found that du/dx is 1/3. dx is 3du. Just by looking at the integral I can tell this is some form of tan^-1(x), if we change it to int(1/(x^2+9...
*October 23, 2010 by Nikki*

**chemistry**

For the following: i) H3PO4 > H3AsO4 > H3SbO4 ii) H2Te > H2Se > H2S > H2O iii) HCl > HBr > HI iv) SbH3 > AsH3 > PH3 > NH3 The order of acidity is correct for which series? 1. ) all are correct 2. ) i and ii 3. )i, ii and iv 4. ) ii, iii 5. ii, iv...
*November 24, 2009 by bob*

**Math**

An atomic particle moves in a linear motion according to the formula s = 19 - 14t2 + 4t3. Determine the particle's velocity at the end of 2.9 seconds. velocity in m/s = My Answer S'= 0-28t+12t^2 S'(2.9) = 0-28(2.9)+12( 2.9)^2 = 0-81.2+100.92 =19.72 Can you please confirm this ...
*January 29, 2013 by Brownie*

**American Government**

Miranda v. Arizona (1966) A. Example of voting rights B. Example of racial - discrimination C. Example of criminal defendant case D. Example of a states rights case I think the answer is D. Please confirm
*December 4, 2013 by Sharon *

**chemistry-confirm please**

Only a chemist can be trusted with the combination to the safe containing a ton of money. The combination is the pH of solution A, followed by the pH of solution C. (for example: is the pH of solution A is 3.47 and the pH of solution C is 8.15 the combination to the safe is 3-...
*May 25, 2008 by Tom*

**URGENT! PLEASE HELP QUICK PHYSICS**

Summarize two observations that are contrary to the predictions based on Newton’s laws but that confirm Einstein’s explanation of gravity. Indicate how the predictions based on Newton’s theory differ from Einstein’s.
*January 15, 2014 by Anon*

**regitration**

I did register but still cant post a question can you help how I confirm my registration
*April 10, 2009 by john*

**Biology **

Among protostomes, which morphological trait has shown the most variation? A. Type of symmetry (bilateral vs. radial vs. none) B. Type of body cavity (coelom vs. Pseudocoelom vs. acoelom) C. Number of embryonic tissue types (diploblastic vs. triploblastic) D. Cephalization (...
*May 18, 2011 by axb*

**pharmacy**

suggest a technique , other than tlc, to confirm the purity of the samples
*April 19, 2012 by pavan*

**english**

I confirm revised assigned rooms as of today, Friday, May 17, 2013.
*May 17, 2013 by Marlena*

**ENGLISH: types of business writing**

Draft an email of at least four complete sentences to Deb Walker the designated trainer: Confirm the arrangements for the seminar providing only the information she needs to arrive at the right place at the right time. Copy both to Mr, Dittmer and Ms. Hopkins Create an ...
*April 4, 2012 by danny*

**Grandpa need Math help**

Gettin to old to help a 13 yr old. I think I know the answer to the below but need to confirm it. Anyone that could assist this ol man would be much appreciated!!! How do the volume of prisms compare as the number of faces in the prisms increases? Does the volume remain the ...
*April 7, 2013 by Grandpa*

**Plz help Physics-bobpursley**

Bob, please confirm if I got this right and if not, please help to solve 1)A wire has a resistance of 10 ohm at 20 deg celsius and 13.1 ohm at 100 deg celsius. Obtain a value for its temperature coefficient of resistance. ans I got is this= using Rt = Ro (1 + alpha(T-To)) 13.1...
*April 17, 2007 by Charles*

**Algebra**

Do the matrixes of -1 4 3 5 2 0 -6 1 multiplyed by 2 0 1 4 3 -2 -5 1 equal -3/4? Thanks, I just want to confirm that my answer is right (or wrong)
*January 5, 2009 by Saria*

**trig**

how can you confirm the identity cos^4x = (1/8)(3+ 4cos2x+ cos4x) and sin4x = (4sinxcosx)(2cos^2x-1)
*July 18, 2009 by Sarah Kim*

**physical science**

If you know that a 1-kg object weighs 10N, confirm that the acceleration of a 1-kg stone in free fall is 10 m/s2.
*February 9, 2014 by sky*

**pre cal**

Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x. f(x) = x2 - 3 and g(x) = square root of quantity three plus x
*June 24, 2014 by jorgeee*

**Chemistry**

I did a lab in which I added ionic solutions to tap and distilled water and another ionic solution. Distilled water is the control because it does not react to any solutions since it doesn't contain ions. But one of the lab questions I need to answer is: These tests cannot ...
*November 16, 2008 by Fred*

**Chemistry - v/v versus w/w**

Thanks a lot:) So just to confirm: normally for any chemical bought from manufacturer, if it is not stated, the % usually means v/v? Seems like for conc sulphuric acid, when it is stated 97% sulphuric acid, it means 97% w/w sulphuric acid? Thank you very much. Posted by annie ...
*September 20, 2010 by annie*

**Calculus**

Find the limit. lim 5-x/(x^2-25) x-->5 Here is the work I have so far: lim 5-x/(x^2-25) = lim 5-x/(x-5)(x+5) x-->5 x-->5 lim (1/x+5) = lim 1/10 x-->5 x-->5 I just wanted to double check with someone and see if the answer is supposed to be positive or negative. ...
*January 22, 2014 by S*

**Trigonometry**

Show algebraically how to confirm that cos2x=cos^2x-sin^2x using the sum and difference identities
*July 15, 2012 by Nikki*

**Chemistry**

A hospital saline solution is analyzed to confirm its concentration. A 60.0 mL sample with a mass of 50.443 g is evaporated to dryness. (a) If the solid sodium chloride residue has a mass of 0.413 g, find the mass/mass percent concentration of the NaCl solution. % (b) Find the...
*March 26, 2014 by Harry*

**math**

Ajax is 8 km due west of Oshawa. Uxbridge is 16 km NW of Oshawa. How far is it from Ajax to Uxbridge? Explain whether you have enough information to solve this problem. my answer was 13.856 km but not confident how I found the angle oshawa to begin with. I used Cos Oshawa = a/...
*August 21, 2011 by Dee*

**CHEMISTRY**

Dr Bob Can you confirm please Given a cylinder of fixed volume filled with one mole of Ar gas,which of the following is CORRECT? (assume that all gases obey the ideal gas laws) A: if the cylinder temp. is changed from 20 to 25 deg.C the pressure will double B:a cylinder of ...
*May 10, 2010 by Andy*

**Math**

A car is projected directly up an incline and its location from its start point is given by the formula s = 9t - 5t2. Determine its initial velocity and initial acceleration. initial velocity in m/s = initial acceleration in m/s2 = My Answer s'=9-10t initial velocity in m/s = ...
*January 29, 2013 by Brownie*

**Science**

Could you please help me. When water is electrolyzed, two gases ar produced. As indicated in the chemical equation, twice the volume of one gas is produced compared to the other. a) Which gas is produced in larger quantities? Explain * I think it's hydrogen, but iam not sure ...
*April 10, 2008 by Samantha*

**science grade 9**

even though carbon dioxide puts out a burning splint it does not confirm the presence of the gas why?
*March 20, 2009 by shan*

**science grade 9**

even though carbon dioxide puts out a burning splint it does not confirm the presence of the gas why?
*March 20, 2009 by shan*

**ALGEBRA**

Factor each expression completely. show some sort of check to confirm your answer. (hint: think FOIL) x^2+11+30 x^2-5x-14 9x-16
*September 5, 2014 by Andra*

**Algebra**

How can I transform the equation 4=x-y into one that begins with "y="? Would I subtract x from both sides to get -x+4=-y? This doesn't look right at all. Or would I add y to both sides and then subtract 4 to get y=x-4? This way seems more correct to me. Please confirm which ...
*May 4, 2008 by Anonymous*

**math**

the line y= o.15x+ 0.79 represents an estimate of the avgerage cost of gasoline for each year. The line 0.11x-y= -0.85 estimates the price of gasoline in Jan. of each yr. a) Do you expect the lines to be intersecting, parallel, or perpendicular? Explain your reasoning. b) Use ...
*September 11, 2008 by dawn*

**Algebra Repost**

How can I transform the equation 4=x-y into one that begins with "y="? Would I subtract x from both sides to get -x+4=-y? This doesn't look right at all. Or would I add y to both sides and then subtract 4 to get y=x-4? This way seems more correct to me. Please confirm which ...
*May 4, 2008 by Anonymous*

**Math - check answer**

A rifle bullet is fired directly upward from the ground. Its height above the ground at any instant of time t is given by the formula, s = 63t - 9.8t2. Assuming there is no air resistance how high will the bullet rise? height in meters = My Answer S'= 63-19t s"=0-19.6 Height ...
*January 29, 2013 by Brownie*

**MATH**

Find the slope of the graph of the function at the given point. Use the derivative feature of a graphing utility to confirm your results. f(x) = 3/x^2 , (1, 3)
*February 13, 2012 by Anonymous*

**maths**

Graph theory question - is K1,3 the same as K4 my answer - i think yes because the numbers symbolise the number of vertices. can someone confirm and explain in detail .
*September 19, 2014 by prash*

**Math**

The voltage in a circuit is given by the formula V = 16t3 - 79t. Find the values for t for which V is a maximum or a minimum. larger t in seconds = smaller t in seconds = My Answer: V=16t^3-79t V'=48t^2-79 0=48t^2-79 Sq root of 1.645833 = t 1.2829= t V''=96t positive therefore...
*January 29, 2013 by Ashley*

**PSYCHOLOGY HELP PLEASE!!**

Psychologist Claude Steele is widely noted for his research on stereotype threat, which refers to a: a. fear of groups for which we hold negative stereotypes. b. fear that members' behavior will confirm stereotypes about their group. c. belief that threatening groups are ...
*December 1, 2011 by Anonymous*

**Physics SHM**

Am self studying SHM, so sorry for the elementary questions. Would someone check/confirm some facts i think I've learned please. 1 If a sine wave graph starts at the origin at time = 0s, the sysyem is in equilibrium? 2 The amplitude at t= 0s is zero. 3 Same system, the phase ...
*November 5, 2008 by charlie*

**SCIENCE 1**

the van der waals equation incorperates coreections for the ideal gas law in order to account for the properties of real gases. one of the corrections accounts for A.the average kinetic energy being inversely proportional to temperature B. the possibility of chemical reaction ...
*May 11, 2010 by Dave*

**Trigonometry**

Find all solutions for the following equation in the interval 0 ≤ x <2pi 3cos(3x)=6 i got cos3x=2, don't know how to go further i think it would be no solution but just want to confirm.
*May 4, 2010 by richard*

**English**

Can you check this sentence, it's really urgent. Before sending you details of my credit card, I would like you to confirm the offer made to me by Mr Smith, your Reservation Executive.
*June 3, 2011 by Henry1*

**General Chemistry**

I have two questions about this problem, I understand how it's supposed to be done but I don't understand how my teacher came to this answer, so I was wondering if somebody could confirm or deny his answer here's the problem. Below what temperature is: I2(g) --> I2(s)...
*April 22, 2007 by Vesone*

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