Sunday

February 7, 2016
Number of results: 9,843

**science help**

How can you describe the location of hafnium (Hf, atomic number 72) on the periodic table? choose all that apply. -Transition metals -noble gases -group 6, period 4 -group 4, period 6 pls help me damon or ms sue pls help me pls pls pls
*March 31, 2015 by Oscar*

**physics**

A man is driving his car ata velocity of 100km/h on a straight road. H e sees a traffic jam at a distance and slows down to 12.5m/s in 3.0s. What is the average acceleration of the car? pls help. I know that the formula for average acceleration is V2-V1 divided by T2-T1 but ...
*October 12, 2011 by ted*

**science**

pls. pls. pls. somebody help me...you see im on a science class and i don't want to go to the regular section, so pls.... give me an acrostic for the word "SCIENCE"
*June 11, 2008 by chris*

**geography**

hi,i have make a project on hurricane Katrina on disaster management pls help to get information pls pls help me............
*June 17, 2010 by varsha*

**Chemistry :'( **

(d) Which of the following sets of quantum numbers is not permitted? Select all that apply. 2,1,1,-1/2 1,1,0,-1/2 2,-1,1,-1/2 3,2,1,1/2 Pls pls pls help me :( x
*November 18, 2012 by Anonymous*

**Algebra1**

what are the coordinates of the vertex of the parabola defined by: f(x)=9(x-8)+8 I'm confused on how to solve this. Help pls
*July 20, 2015 by kesha*

**chem**

What does it mean by Keq? Pls need an explanation with this. I'm a little bit confused. Thanks
*December 3, 2012 by Bea Alonzo*

**Trig**

Need answer check pls. Find the rectAngular equation for the plane curve by parametric equAtions. X=t +4 , y= t^2
*April 25, 2010 by Stacey grahaM*

**Finance**

Omega Instruments has budgeted $300,000 per year to pay for certain ce- ramic parts over the next 5 years. If the company expects the cost of the parts to increase uniformly according to an arith- metic gradient of $1 0,000 per year, what is it expecting the cost to be in year...
*May 26, 2013 by Aly*

**Math**

Can u pls pls pls solve this algebraic expression?? I cant solve it although I tried many possible ways and solutions :/ 10+1/3[4k-(18+7k)]
*July 31, 2011 by Sally*

**Math**

using echelon method 4x-2y=9 20x-10y=27 pls help with problem. Once I get 24x -2y 36 I'm confused after that.
*February 27, 2010 by Marie*

**trig confused.. pls help**

A group of mountain climbers are using trigonometry to find the height of a mountain located in the Rockies. From point A, which is due west of the mountain, the angle of elevation to the top is 56 degrees. From point B, which is due east of the mountain, the angle of ...
*May 3, 2011 by Mhy*

**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*

**afrikaans (AFK503/101)**

Hi there, can anyone pls help me with AFK1503/101 - 2015. I am seeking an English version of this assignment pls, is there an English one available? if there is pls provide me with a website address to get access. Thank you. Tanya
*August 12, 2015 by Tanya*

**Physics**

A child pulls a wagon along level ground. The handle with which she pulls the wagon makes an angle of 20.0 degrees with the ground as the child pulls with a force of 78.0 Newton. What are the components of the force. Pls pls pls pls help me answer this and may God bless u!
*October 16, 2013 by Stephanie*

**(pls help) Trig**

point P and Q are respectively 24m north and 7m east of point R. What is bearing of Q and P to the nearest whole degree.(a)52(b)164(c)134(d)159
*July 7, 2013 by david*

**Calculus**

1. integral (x^3 * sqrt(x^2-4)) dx I'm confused on how to start this problem, if I am doing trig substitution.
*April 5, 2015 by K*

**math**

y=x^2e^x I am suppose to find the dy/dx of this the way i did it was x^2e^x times dy/dx of x^2 and got x^2e^x times 3x^2 this is not right and im confused on how to solve it help pls.
*August 12, 2009 by sonia*

**Computer science**

How can i use the 'Adobe Photoshop'? I am really confused how to use/edit a photo. Will ypu pls help me to know about it? Thank you
*December 10, 2014 by Jahanara*

**trig**

The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s= 2 sin pi t + 3 cos pi t, where t is measured in seconds. (a) Find the average velocity during each time period: (i)[1,2] (ii) [1,1.1] (iii) [1, 1....
*September 23, 2008 by Sarah*

**Trig**

Verify and identify, I am so confused on how to do this? this is an extra credit but I am lost, please help. cot(-/2)=-tan
*October 22, 2014 by Maxine*

**Chemistry**

PLS HELP ME(1)Write a balanced equation in each case dilute hydrochloric reacts with[i]ZnCO3[ii]CuCO3 (2)Discuss how hydrocarbons contribute to the formation of ozone in the atmosphere.I'M CONFUSED I NEED HELP!
*June 18, 2015 by Anonymous*

**chem**

Describe in detail by words how to prepare 200ml of .150M HCl from a 1.00 M HCl stock solution? Need help with this please? i used C1V1=C2V2 and got volume 2 = 33L or 0.33mL. to prepare the solution i need to weigh 1 gram of HCL (from 1.00M HCl stock solution)lets say i put it...
*November 27, 2012 by vince11*

**Algebra 2/Trig**

Solving Multivariable Linear Systems: 3x-5y+5z = 1 5x-2y+3z = 0 7x-y+z = 5 I am confused on how to solve this. I'm supposed to use the Row-Echelon form. Thanks.
*February 26, 2009 by Chris*

**Physics help**

A 90 kg parachutist in free fall has an acceleration of 6.8 m/s^2. What is the frictional force provided by air resistance when she is accelerating at this rate? For this question i got 612N but the text book answer says it is 270N. Pls help!! I'm confused
*March 21, 2013 by Ted*

**MANIPULATION OF DNA**

can anyone describe to me what this is pls? also can anyone pls explain how dna manipulation works and what it does pls?
*April 1, 2009 by GLORIA*

**chem**

4HCl+O2=2Cl2+H2O Detremine the Kc expression for the reaction above by identifying what belongs in the numerator and what belongs int he denominator? pls do help trying to understand the concept but still confused.
*November 19, 2012 by byke*

**vectors **

Show that a(b c) = (ab) (ac), given that a =(A B), b =(B C), c =(C A). WORKINGS ... given, a(b c) = (ab) (ac) :. imputing the values of a, b and c (A B)[(B C) (C A)] = [(A B)(B C)] [(A B)(C A)] solving for a(b c) a(b c) = (A B)[(B C) (C A)] = This where...
*January 26, 2015 by Francis *

**physics.pls help**

How do you know what element is chemically active on the periodic table? PLS HELP
*October 5, 2011 by ted*

**math help**

1/4 divided by 3/8 pls help me im confuss i forgot the ste pls explain
*October 27, 2012 by Anonymous*

**pre algebra**

2x^2 + 8 - 4x + 3x - 6x^2 + 7 what does this simplify to A)-8x^2 - 7x + 15 B)-4x^2 - x + 15 C)4x^2 + x + 15 D)8x^2 + 7x + 15 pls help me reiny steve or damon pls help me
*March 23, 2015 by Oscar*

**math pls help me **

(-2y + 5 )(y + 3) what would this simplify to? A)-2y^2 + 8y + 15 B)-2y^2 - y + 15 C)2y^2 + 8y + 8 D)2y^2 - y + 8 pls help me steve or damon or ms sue
*March 23, 2015 by Oscar*

**math**

Pls i want you to teach me the 5 90 lotto formular pls i need it now
*September 30, 2015 by abiodun*

**food science**

pls give me an idea on the formulation of bavarian cream filling. pls. thank you
*January 4, 2008 by vcq*

**Science(Help NOW, Pls)**

wat elements make up water? pls help! i will be very happy if you do! :S
*December 15, 2010 by GirlSense*

**physics.pls help**

Why is it important to asaume that a rope under tension is taut and does not stretch. pls help
*November 14, 2011 by ted*

**Science(Help NOW, Pls)**

organisms in which domain live in every environment? pls help, im stuck on this one. :S
*December 15, 2010 by GirlSense*

**physics.pls help**

A 100g bird sits in its nest. what is the Fnet(net force) in this case? pls help
*November 10, 2011 by ted*

**physics.pls help**

can you help me to isolate the ''t'' in this formula. d=V1t+1/2at^2 pls help
*November 5, 2011 by ted*

**(pls help) algebra**

4x+y-32=1, 6x-y-4z=7, 10x+2y-6z=5 pls show me how to solve for x,y,z. Ans:xx=1.5,y=-2,z=1
*July 8, 2013 by david*

**e commerce or marketing, help pls**

hi,good evening everyone can you help me on finding a clothing manufacturer resource system??? pls thank you
*December 6, 2011 by need ASAP*

**Algebra help pls fast**

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls
*January 8, 2016 by Laura*

**Chemistry**

rank the following atoms and ions in the order of expected increasing radius: Ca, Ca2+, Ar Pls pls help me kindly... Anyone?
*November 18, 2012 by Anonymous*

**Pre-Algebra Help pls fast**

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls
*January 8, 2016 by Laura*

**english,zulu,math lit,geography,life sciences,life orientation and history**

2016 is my last year at school but am still confused about my career couse i dont know what i want to be in life so pls help
*February 4, 2016 by pretty presant*

**PLS HELP ME WITH ONE MATH QUESTION!!???**

pllllsssss help me!!!!!!! 5. How many lateral edges are there in a triangular prism? (1 point) 6 3 9 12 I dont know if its 6 or 9 or even 12!!??? pls help asap!!!!!
*February 19, 2014 by TTR+S<3*

**Help pls. **

Compute the acceleration of the block sliding down a 30 deg inclined plane if the coefficient of kinetic friction is 0.20. Show solution pls.
*August 23, 2014 by Yan-yan*

**LA --- 1 question pls help!!!**

hi, one question based on the short story called, "Cyber Chitchat" this one confuses me, pls help if u know the book! 8. The tone of "Cyber Chitchat" is (1 point) serious. humorous. depressing. angry. i think its humorous but im not so sure..... pls help asap!!!!! thanx in ...
*March 2, 2014 by TTR+S<3*

**Math **

This one confused me since it revolved around what seemed like dividing trig function by another function Write the following expression in terms of the tangent function 2 / ((cos(r^2 - s^2) / (sin(r^2 - s^2)) = ? I know tan t = sin t / cos t. So would I multiply by the ...
*November 14, 2014 by Taylor*

**CHEMISTRY> HELP QUICK! pls**

I GOT THIS WRONG IN AN ASSIGNMENT. I HAVE AN EXAM IN 2 DAYS. CAN YOU SHOW ME HOW TO DO IT PLS. What is the pH of a 2.62 x 10 -1 M NaNO2 solution ? NB the pKa for HNO2 = 3.153. 12.13 13.42 1.87 8.29 0.58
*June 4, 2010 by Lucinda*

**Math Precal/Trig**

Solve for n. 7((1-(-3)^n)/(1-(-3))=3829 I was confused on distributing the number 7, because we've always had problems with the number 1 on the outside.
*September 18, 2014 by Samee*

**trig**

I'm trying to see if the teacher didn't give us the right problem or if I'm just not getting it. The problem is "re-write the expression without a fraction: 4/(1-sin x)". I can do it if the problem is sin squared x but I don't know how to solve the problem given. Pls help. thx
*September 19, 2009 by Priscilla*

**math --- 2 questions!**

help pls!!! i am confused!! can you check to see if these are right!?? 4. List all of the quadrilaterals with exactly one pair of parallel sides. (1 point) parallelogram; trapezoid rhombus; parallelogram; rectangle trapezoid rhombus; square; rectangle 5. List all of the ...
*January 30, 2014 by TTR+S<3*

**physics**

pls explain this to me ? "momentum is inertia....but inertia is NOT momentum" :S confused
*December 9, 2012 by Anya *

**Trig**

Find all the solutions in the interval [0,2pi). 2sin2x - sqrt(2) = 0 sin2x = sqrt(2)/2 I'm confused by the double angle. Please help.
*December 2, 2008 by Travis*

**ss --- one question pls help!**

pls help!!! What kept the price of cotton high in the years before 1860? a. cotton gin b. demand in Great Britain c. slavery d. large plantations I origionally thaught it was a. cotton gin, but after research, it looks like it was b. demand in GB my textbook doesnt say ...
*February 27, 2014 by TTR+S<3*

**trig**

can you please show me in steps how to find f(1+a) in this equation f(x)=-2x^2+4x+6 i know that you will plug in 1+a anywhere there is x. but after that i get confused. also can you tell me how to find the domain and range of a relation for ex. 2x+5y=10 thanks for your help!
*November 14, 2008 by y912f*

**physics- TEST TMRW PLS HELP!**

how would i do this? -----------------A-----------B-------- I<----1.5m------>l<--0.6m-->l<-0.3m->l a carpenter carries a 6kg board . the downward force he feels on his shoulder (A) is .... ? (B is where his hand is) pls help!! i have so much difficulty with ...
*December 9, 2012 by Anya *

**History**

The Transcendentalism movement most directly affected the development of American politics literature popular culture painting and sculpture Is it c. Pls help me ms sue or dr.bob or steve or anyone pls help me
*March 20, 2015 by Oscar*

**geometry**

Write a paragraph proof. Given: A is congruent to B. B is congruent to C. and D is perpendicular to C. Prove: A is perpendicular to D im reallllyyy confused pls help me write this out
*December 1, 2015 by HELENA*

**physics**

pls explain to me how you add 65km{North 85 degreesWest], 3500m[South 10 West}, 6000m{East 70 degrees South], 54km[North 60 degrees East]. pls explain to me how i should add these vectors. I really need help. pls help
*October 26, 2011 by ted*

**Math**

Pls help .[1] Solve the eguation 4*=28. [2] change 1/20 to decimal [3] change 60% to a common fraction . Pls i need the solving thank you
*February 23, 2012 by Bright*

**calculus**

After solving with A=(-1,2) x^2+2x^2+x+1 got 119/12a pls where did i get it wrong. And with -[(-55)] x^2-25dx i got -50 pls am i correct
*September 7, 2013 by grace*

**Lotto game**

This is winning Number, 55-80-83-65-3, pls can you help me out of the next number on 1th feb 2014, pls,
*January 30, 2014 by Adekunle*

**math pls help!!!!!**

these are the few i dont know/im not sure. pls help! The distance from Newtown to Oldtown on the highway is (6x^2 + 2x 2) miles. Using the back roads, the distance is (5x^2 8x 6) miles. How many miles shorter is the second route? A. 11x^2 + 10x - 8 B. -x^2 - 6x + 4 C. x^...
*May 31, 2014 by zumai*

**physics**

help pls. i need to find the best animation of the movement of electrons and protons... the best one... pls send me the link. thanks so much.
*April 24, 2015 by Lucy*

**social studies---check 1 question pls**

6. Whose mill launched the factory system? (1 point) James Monroe Eli Whitney ***Samuel Slater*** Francis Cabot Lowell help pls
*January 29, 2014 by TTR+S<3*

**english**

need some ideas for a classification essay on advertisement pls I have submitted three different options to my teacher and he has declined them either saying there is overlap or they are not distinct. i am stumped! pls help
*September 13, 2014 by c*

**physics.pls help**

How much time can you save travelling diagonally instead of running 450meters south and then 650meters west. if your running speed is 5.0m/s. pls help
*November 1, 2011 by ted*

**math help pls pls**

Systems of equations with different slopes and different y-intercepts have more than one solution. Always Sometimes Never
*December 2, 2015 by Oscar*

**Science(Help NOW, Pls)**

when rock layers are pulled from opposite directions, one block tilts up, while the other block does what? answer pls, need help.
*December 15, 2010 by GirlSense*

**values...pls. help me**

can you help me please how to get an answers for this question below.. pls.give me an examples for this question. thanks God bless you.. 1.xplain a strategy wherein a liability may turn out to be an asset to ANYONE?
*August 25, 2011 by Jessie*

**science**

pls could u give me a website with all the science warning signs on in pls?
*October 13, 2009 by holly*

**sociology-pls help**

similarities between milgram's experiment and stanford experiment pls help
*November 4, 2011 by ted*

**algebra-trig**

Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.
*April 12, 2012 by missy*

**algebra-trig**

Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.
*April 12, 2012 by missy*

**Trig**

Find the amplitude, if it exists, and the period of: y=tan1/4x. no amplitude I got confused, is the period 4pi? And is that the same as saying 360 degrees?
*March 7, 2008 by does it matter at this point?*

**physics-pls help**

The ball is thrown froma height of 10 meters with an initial upward velocity of 3.0m/s. How long does it take to land on the ground? What is its maximum height? i know the formula is d=v1t+1/2at^2 but i do not know what else to do. pls help
*November 7, 2011 by ted 2*

**Trig**

How do I prove the following Identity? sec x(sec x-cos x)=tan^2x If there is a certain website or suggestion to help with these type of equations I would greatly appreciate it. I've been studying these for a while but still get pretty confused.
*May 31, 2011 by Mel*

**Chemistry**

Iron metal is formed during the reduction of iron(III) oxide: Fe2O3 + 3CO 2Fe + 3CO2 When 24.3 kg of Fe2O3 react with 14.6 kg of CO and 7.8 kg of Fe are recovered, what is the percent yield for the reaction? Pls.. help I am having a hard time finding the answer. The wordings ...
*April 13, 2011 by komal*

**epp**

pls this is just a simple question how can plants grow using the branch? using the fruit? ang using the head? pls answer in english or tagalog, thank you!!!
*February 19, 2008 by renz anthony*

**chemistry pls help**

If 10.0 mL of 1.0M HCl is added to 90 mL water, what is he concentration of the new solution? What is the pH of this solution? If the solution is titrated by 0.500M Ca(OH)2, how much volume (ml) of NaOH necessary? Need help pls.
*December 8, 2012 by Emmy*

**physics- TEST TMRW PLS HELP!**

w w w . m e d i a . c h e g g c d n . c o m / m e d i a / a c 3 / a c 3 b b 1 e 1 - 5 b a 8 - 4 1 9 e - 9 a 8 4 -a d 5 0 e 4 6 a 2 9 4 e / p h p s U O o L 3 .p n g (delete all spaces for link to work) Determine the magnitude of the resultant moment produced by the forces about...
*December 9, 2012 by Anya *

**Math**

Could someone pls. help me out on the following question: find the producers surplus (to the nearest dollar ) at a price level of p=$26 for the price-supply equation p = s(x)= 5ln(x+1) . An early response would be greatly appreciated pls. Thank you.
*January 12, 2013 by Jim*

**science help.. pls help me dr.bob22**

A metal from group 1 and a nonmetal from group 17 are? A. Not likely to bond B. Likely to form a covalent bond C. Likely to form a ionic bond D. Likely to form a metalloid is it c pls help me pls help me
*March 31, 2015 by Oscar*

**precalc**

Suppose that z1=6-8i. Find: A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2, where z2=5[cos(60degrees)+isin(60degrees)] C. The Trig Form of (z1)^4
*December 5, 2011 by Joshua*

**electronics**

pls help me guys... 1.) what is the function of cathode? 2.) what is the function of anode? pls answer it specifically and direct to the point. thanks guys. I really appreciate your big help on me. :)
*June 30, 2009 by akitsuke*

**science,details about fish HELP PLS!!!!!!!!**

Why are fish important? how do they help balance the ecosystem? how can we protect fish? what does overfishing affect other than fish? Pls and thank you
*April 7, 2009 by Jan*

**calculus**

1. what trig function has an amplitue of 1 and negative values for angles between π/2 and π? 2. what trig function never crosses the x-axis and has a value of 2 at π/6? are these correct? 3. what trig function has a period of π and is undefined for -π/...
*September 28, 2015 by anon*

**physics.pls help**

Participants in a road race take water from a refreshment station and throw their empty cups away farther down the course. If a runner has a forward speed of 6.20m/s, how far in advance of a garbage pail should he realease his water cup if the vertical distance between the lid...
*November 8, 2011 by ted*

**physics.pls help**

Participants in a road race take water from a refreshment station and throw their empty cups away farther down the course. If a runner has a forward speed of 6.20m/s, how far in advance of a garbage pail should he realease his water cup if the vertical distance between the lid...
*November 9, 2011 by ted*

**parenting**

making the decision to have a child is momentous. it is to decide forever to have your heart go walking outside your body. pls i was asked to write a one page reflection, but i don't know what to write or how to start. pls help me
*September 12, 2010 by Ted*

**CONTROL SYSTEM**

HELP,PLS HELP..I NEED ANSWER FOR ECEN 4413 AUTOMATIC CONTROL SYSTEMS SPRING 2005 MIDTERM EXAM..I CANNOT FIND ANSWERS IN THE INTERNET.PLS HELP IF YOU KNOW WHERE TO DOWNLOAD THE SOLUTION MANUAL..OR YOU KNOW THE ANSWER!!THANK YOU
*October 5, 2013 by HEEELLLLPP!*

**math(urgent)**

$1000 was invested for two years at 10% simple interest .calculate the effective rate was earned. pls check my solve (1+0.1/2)^2-1 = 0.1025 but the true answer is 9.54% pls help me to get the formula of effective rate
*May 16, 2014 by fizz*

**math**

pls help me to solved this equation 1. 6y=x+18 2y-x=6, 2. 4x=3y=13 2x-4y=1 3. y=3x-12 2/3x=2/3-1/6y pls help me now. this equation is Systems of Linear Equations Solved Algebraically.
*July 25, 2010 by joy*

**Math help check**

8t^5 x 8t^5 A)64t^25 B)64t^10 C)16t^10 D)16t^5 can u pls help me ms sue, damon, or steve, or reed.pls help me
*March 23, 2015 by Oscar*

**math help pls pls**

A system of equations is shown below: x + y = 3 2x y = 6 The x-coordinate of the solution to this system of equations is _____.
*December 20, 2015 by Oscar*

**math**

could someone please refresh my memory of the basic trig functions? ex) cos^2 + sin^2 = 1? That is a trig identity. http://www.sosmath.com/trig/Trig5/trig5/trig5.html
*April 12, 2007 by raychael*

**chem **

Can anybody explain to me how to determine the endormicity and exormicity in a reaction and where does the equilibrium shift. Pls. give an example of it. Iwas reading my book and trying to understand but i really can't comprehend it. Now I'm stuck here i can't answer my post ...
*November 29, 2012 by Angel Locsin*

**chemistry**

pls help i need the answer not jus part of it, pls im really stuck out here. A buffer was prepared by dissolving 0.100 mol of the weak acid HA (Ka = 1.00 10−5) plus 0.050 mol of its conjugate base Na+A− in 1.00 L. Find the pH.
*December 1, 2012 by canas*