Sunday

July 24, 2016
Number of results: 44,502

**Calculus**

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the x-axis. y=ln x, y=0, x=1, x=3 Please show the steps in your work, thanks! :)
*March 29, 2008 by Pan*

**Phy**

98N-T=10a T-18.89N=3a I worked on the problem and I end up getting two equations but now I have to find T and a. For some reason, I cant solve it. Thanks
*February 28, 2010 by Ana*

**Math**

solve the system of linear equations using the addition method. Can you please show me the steps on how you reached the answer. Thank You 2x+20y= -144 12x+5y= 56
*May 11, 2010 by Heather*

**math**

Find equations for exponential functions that pass through the given pair of points. (Round all coefficients to 4 decimal places if necessary.) (-2, 3) and (3, 4)
*October 7, 2010 by liz*

**Maths- Discriminants**

Find the values of k for which the following equations have 2 distinct roots. a)kx^2+kx+2=0 b)kx^2+3k+k=0 c)x^2-2kx+4=0 Im stumped please show working so i can see what needs to be done
*October 31, 2010 by Anonymous*

**Chemistry**

I am having some difficulties balancing the following equations: Cr2O3(s)+CO(g)->Cr(s)+CO2 Ca(OH)2(aq)+Na3PO4(aq)->Ca3(PO4)2(s)+NaOH(aq) Sb2S3(s)+O2(g)->Sb2O3(s)+SO2(g)
*November 13, 2010 by TMV*

**MATH**

Determine graphically whether each given point is a solution to the system of linear equations. y = 4x-9 y = -2x+3 (2, -1) Is there any good online graph which could help me plot the points and stuff?
*January 5, 2011 by Anonymous*

**chemistry**

Complete the following word equation and write the balanced formula equations: a. Zinc(s) + iodine(g) b. Hydrogen peroxide(l) c. Magnesium(s) + lead(IV) nitrate(aq)
*March 3, 2012 by Anonymous*

**chemistry**

3. Complete the following word equation and write the balanced formula equations: a. Zinc(s) + iodine(g) b. Hydrogen peroxide(l) c. Magnesium(s) + lead(IV) nitrate(aq)
*March 4, 2012 by Anonymous*

**Chemistry**

A compound has four pKa values (3.5, 5.8, 9, and 12). Calculate the pH of the solution when 500 ml of 0.50 M of tetrasodium X is mixed with 650 ml of 1.0 M HCl. Include chemical equations in the answer.
*September 5, 2012 by dhruti*

**Physics**

A stone is thrown from the ground with initial velocity v0 directed at angle alpha with respect to the horizon. Find equations of its motion both in x and y directions.
*November 10, 2012 by David*

**analytic geometry helps are appreciated**

For some positive real number r , the line x+y=r is tangent to the circle x^2+y^2 = r. Find r. How do we do this? Set equal equations together??
*March 1, 2013 by Knights*

**Derivative **

given that f, g, and h are differentiable functions f(g(h(x))) = x what is h'(x) in terms of f, g, f', g', and h'? I plugged in equations on my own like h(x)= x^4 g(x) = 4th root of x f(x)= x^2 i need more assistance on how to proceed thnx
*March 7, 2013 by Mary*

**math**

I am working on quadratic equations and I have worked a problem down to 3 plus or minus the square root of 361 all over 2... what next?
*March 12, 2013 by Robin*

**math**

The real numbers x and y satisfy the nonlinear system of equations {2x^2 − 6xy + 2y^2+ 43x + 43y = 174 x^2 + y^2 + 5x + 5y = 30. Find the largest possible value of |xy|.
*June 17, 2013 by jack *

**math**

The real numbers x and y satisfy the nonlinear system of equations 2x^2−6xy+2y^2+43x+43y=174 & x^2+y^2+5x+5y=30. Find the largest possible value of |xy|.
*June 20, 2013 by raja harishchandra*

**math**

The real numbers x and y satisfy the nonlinear system of equations 2x^2−6xy+2y^2+43x+43y=174 x^2+y^2+5x+5y=30. Find the largest possible value of |xy|.
*June 21, 2013 by anonymous*

**Pre-Cal**

How do you find the number of solutions(not all the answers) for each of the following equations 1) 2sec^2 4x - 3sec4x =5 2) 2tan^2 12x +3tan12x -7 =0 3) 2sin^2 5x + 3sin5x +1 =0
*November 18, 2013 by Lilly*

**Calculus 2**

Find Mx, My, and (x, y) for the laminas of uniform density ρ bounded by the graphs of the equations. y=sqrt(x)+4 y=(1/2)x+4 The I keep getting 20/3 for Mx but webassign acts like it is wrong.
*February 5, 2014 by Dominic*

**Math (Calculus)**

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the y-axis. (Use Disc Method) y=3(2-x), y=0, x=0
*May 8, 2014 by Sherman*

**Math**

Which of these equations would not be in quadratic form? A.X^4-13X^2+36=0 B.2X^(2/5)+X^(1/5)-6=0 C.6x^3+2x^2-8X=0 D.3(2/x-4)^2+5(2/x-4)-2=0 I think its between C or D. C because the exponents are different not doubled and D because its set up is completely the opposite from ...
*September 3, 2014 by M*

**Chemisty **

The aqueous solution of two soluble salts are mixed to precipitate an insoluble salt. Give four different equations to support this statement.
*May 3, 2015 by Saurav ; please help*

**English 1**

What did the author of “The Cold Equations” most likely want you to believe? What examples from the story make you think this? Explain your answer in three to five sentences.
*June 17, 2015 by Anonymous*

**Logarithm help please**

Express y as a function of x. What is the domain? Explain your answer. log4y = x + log4 Solving exponential equations with logarithms Solve to the nearest thousandth. 5^1+x = 2^1-x
*September 18, 2015 by Joe*

**Chemistry**

Construct a Born Haber cycle for the formation of calcium oxide showing clearly using equations, the steps of the enthalpy stages involved
*January 28, 2016 by Demario*

**Pre-Calculus**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x - y + 3z = 12 x + 4y + 6z = -32 5x + 3y + 9z = 20 Please help me..
*June 2, 2016 by Liz*

**algebra**

Solve the inequality. |2x+3|< 26 So there are two answers to this problem? Do you switch the inequality sign for the second answer? This is the absolute value of some quantity I suppose. We have |2x+3|< 26 Thus we want numbers such that -26 < 2x+3 < 26 You can ...
*August 30, 2006 by anonymous*

**Mathematics for Liberal Arts**

absolute value symbol l l First look at some small finite sets: Let A={1,5,9} B={U,V,W,X,Y,Z} C={Barrak Obama, Joe Biden, Hillary Clinton} Fill in the blanks with one of the symbols <,>,= lAl lBl lAl lCl lAl lAl lBl lCl Describe how you decided the comparative sizes of A...
*November 7, 2010 by Jamie*

**Algebra1!Plz help I have test 2morrow!!!**

so would the new eqaution be... 2x+8=10 then.. 2x=2 x=1? We know that y = x + 8. So if x + y = 10, then x + x + 8 = 10. but what about the y?ANd what do I do afetr that? If you know what x equals, then you can calculate what y equals. Once you've solved for x and y, you are ...
*November 4, 2006 by Sammy*

**Help help help!!!!!!!!!**

Simplify 18. -(-4)+3= Solve equations of the form x+a=b solve 26. 6.3=t+2.9 30. -8=14+(d+-6) 32. 312.9+163.4+b 34. - 11/5+w=-4/5 Thank You very much!!!
*December 9, 2007 by Alex*

**PreCalc**

How do I verify that the following equations is an identity: 1+ sec x sin x tan x = sec^2 x
*July 30, 2008 by Glen*

**PreCalculas**

How do I verify that the following equations is an identity: 1+ sec x sin x tan x = sec^2 x
*July 30, 2008 by Glen*

**QUADRATIC EQUATIONS**

How do i solve this, by factorizing... 4x(squared)-196=0 Example: 3x(squared)-12=0 (3x+6)(x-2) THNX
*October 15, 2008 by Sam*

**alegbra**

Need help with this problem 8x-5y=20 5y-8x=-20 Please help me with this problem Solve the system of equations by graphing.
*April 5, 2009 by jspurlock*

**intro. to chemical equations**

Al2(SO4)3 does the 3 apply to everything or just the SO4. thank you.
*May 31, 2009 by Geff*

**math**

Are all linear equations functions? Is there an instance in which a linear equation is not a function?
*June 2, 2009 by scooby9132002*

**Math logs**

Solve the system of equations: y= (lnx)^2 + 2 (lnx^2) y = 3ln(1/x^2)+24 Im not sure what to do..
*October 14, 2009 by Mike*

**Geometry**

Triangle ABC has vertices A = (0,6) B = (-2,3), and C = (2,1). Find the coordinates of its vertices if it is translated by the equations: x' = x - 4, y' = y -3
*December 4, 2009 by Lenora*

**math**

6x-4y=20 and 4y-6x=-20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions
*March 27, 2010 by KiKi*

**Vectors **

Given each scalar equation, write a vector equation and the parametric equations. 8x + 9y = -45
*June 5, 2010 by Anonymous*

**math**

Solve the following system of equations x + 4y=6 x= 4-4y A. The solution is an ordered pair ( , ) B. No Solution
*July 9, 2010 by christy*

**math**

how do you find all real and non real solutions to these type of equations?: (x+3)^2 - 81=0 (x+1)(x-2)=18 THANKS!
*August 22, 2010 by Alex*

**calculas**

Find the equations for the tangent line and normal line to the curve for f(x)=(x^4)+(2e^x) at the point (0,2)?
*September 28, 2010 by john*

**math**

I need help on this math problem Solve the systems of equations by elimination. -2x+y=7 6x+12y=24
*February 6, 2011 by pdub*

**science/chemistry**

what does these equations mean metal+water=metal hydroxide+hydrogen
*February 16, 2011 by chloe*

**chemistry**

Write molecular, ionic, and net ionic equations. AgNO3(aq) + KBr(aq) -->
*June 20, 2011 by Brea*

**chemistry**

what is the balanced molecular, total ionic, and net ionic equations for HC2H3O2 + Mg(OH)2 ??
*June 27, 2011 by chelsea*

**Math-System of Equations**

1. Solve for x, y, z in the following system: 2x-3y-2=z y-x+z=1 -y-2z=7 The answers are: x=-7 y=-5 and z=-1 however I don't know how to go about this.
*November 3, 2011 by Lilly*

**Polar equations**

write 3x-6y=-14 in polar form. round phi to the nearest degree
*April 20, 2012 by Please Help Me!*

**math**

Solving Equations with Fractions 1/2 x - 1/3 x = 7/3 solve for X i need help step by step process anyone?
*July 12, 2012 by nain*

**calculus**

Find parametric equations for the line that is perpendicular to the plane 2x-y+3z=7 and intersects the plane when x=1 and y=1.
*January 15, 2013 by Zac*

**calculus**

Find the parametric equations for the line that contains the point (3,1,-4) and is parallel to the line r(t)=(1+2t)i+(-3-t)j+(5+5t)k
*January 15, 2013 by Zac*

**math**

Identify the solution(s) of the system of equations, if any. -2x-4y=1 12y=-6x-3 a) no solution b) (0,-1) c) (-1,0) d) infinitely many solutions
*January 27, 2013 by monet*

**Chemistry**

why is it important that the equations be balanced when performing mass-mass stoichiometry problems?
*March 18, 2013 by Lindt*

**Pre-Calc/Calc**

Which set of parametric equations corresponds to this rectangular equation? y=2x-(x^2 / 10) A. x=4t, y=4t-(t^2 /10) B. x=2t, y=8t-(4t^2/10) C. x=2t, y=4t-(4t^2/10) D. x=.5t, y=2t-(t^2/10) E. x=t, y=t-(t^2/10)
*April 17, 2013 by Chris Math Hw Help*

**Math 116**

identify the solution (s) of the system of equations, if any. -3x-4y=2 8y=-6x-4 a. infinitely many solutions b. (-16/9, 5/6) c.(-2/3,0) d. no solution
*June 21, 2013 by Queta*

**math calculus**

convert these symmetric equations to parametric form: line 1:(x-1)/k = (y-2)/2 = (z+1)/k-1 and line 2: (x+3)/-2 = (z)/1, y=-1
*November 29, 2014 by Sarah*

**Math**

Solve the following systems of equations: -2x+y=1 -4x+y=-1 (3,1) (-1,3) (-1,-3) (1,3) Could someone please help. I'm confused on how to solve this. Thank you!
*December 3, 2015 by Mason*

**Math**

Explain how to solve the following system of equations. What is the solution to the new system? 2x + 2y + z = -5 3x + 4y + 2z = 0 x + 3y + 2c = 1
*January 29, 2016 by RedRov3R*

**Math**

Parametric Equations x = 9s^2 - 1 y = 1 - 8s^3 find dy/dx in terms of s find the coordinates of stationary points
*February 28, 2016 by Tony*

**Algebra**

I am having a problem with solving a composite function in Algebra 1 How do I solve f(x) = -2x + 1 and g(x) = 4x? Don't I need more info? No, that is all you need. I it unclear what you want to do here. see http://library.thinkquest.org/C0110248/algebra/functions_c.htm
*July 18, 2007 by Alec*

**Algebra-Please Help!!!**

You are selling rings for $7 dollars each. You have been contacted by a customer in Alaska who wants to purchase several of these rings and wants you to ship them to her. It’s only going to cost you $5 to ship these items to Alaska. Suppose another company sells the same item ...
*May 17, 2016 by Scarlet*

**Math**

use linear combinations to solve the system of linear equations. 2x+y=4 x-y=2
*February 6, 2008 by Crystal*

**mat**

Is their a free online calculator to graph linear equations? How do you graph x=y+3
*April 21, 2009 by Bryan*

**Algerbra1**

Use elimination to solve each system of equations: s-t=4 over s+t=2; -4x+2y=8 over 4x-3y=-10
*October 21, 2009 by Tyrone*

**maths**

the easiest method for simutanious equations using subsitution method is??
*October 22, 2009 by salman*

**Quadratic Equations**

If I were looking at a graph of a quadratic equation, how do I determine where the solutions are?
*September 2, 2010 by Lynn*

**geometry**

how can you tell in geometry that the equations are parallel, perpendicular , neither, either?
*September 25, 2010 by 14*

**Math**

Use linear combinations to solve the system of linear equations. 5x=4y-30 2x+3y+-12
*January 18, 2011 by Sarah*

**differential equations**

solve the differential equation by seperation of variables 5. y'=xy/2ln y
*March 17, 2011 by cathy*

**math linear equations**

how do u make a linear equation from a data table??
*May 9, 2011 by bob*

**chemistry**

Write molecular, ionic, and net ionic equations. HIO2(aq) + Ba(OH)2(aq) -->
*June 20, 2011 by Brea*

**chemistry**

Write molecular, ionic, and net ionic equations. HIO2(aq) + Ba(OH)2(aq) -->
*June 20, 2011 by Brea*

**Trigonometry**

Solve the equations secΘ - 1 = (√2 - 1)tanΘ
*December 24, 2011 by Kewal*

**math**

Identify the solution(s) of the system of equations, if any. -3x -4y = 2 8y = -6x – 4 a) infinitely many solutions b) (-16/9, 5/6) c) (-2/3, 0) d) no solution
*January 27, 2013 by monet*

**math**

Identify the solution(s) of the system of equations, if any. x=1 y=1 a) no solutions b) (0,0) c) (1,1) d) infinitely many solutions
*January 30, 2013 by monet*

**MATH**

Identify the solution(s) of the system of equations, if any. x=1 y=1 a) no solutions b) (0,0) c) (1,1) d) infinitely many solutions
*January 31, 2013 by Anonymous*

**maths**

The variables x and y satisfy the equations 2/x−24/y=−1 and 6/x+33/y=2. Find the product xy.
*February 13, 2013 by Rox*

**math**

(Math+lice)+ (equations+R+P- Square)= Decimal_______ I don't have a clue How to do this
*May 2, 2013 by Hanah*

**math**

Identify the solution(s) of the system of equations, if any. -4x - 4y = 4 4y = -4x - 4 A) no solution B) (0, -1) C) (-1, 0) D) infinitely many solutions
*October 20, 2013 by sam*

**Math 6**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8y=-6x-4 A) infinitely many solutions B) (-16/9, 5/6) C) (-2/3, 0) D) no solution
*October 20, 2013 by sam*

**math**

Identify the solutions of the systems of equations, if any. -4x-4y=8 4y=-4x-8 No solution (0,-2) (-2,0) Infinitely many solutions
*September 2, 2014 by amber*

**maths**

Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Solve for a
*September 12, 2014 by segzy*

**Math **

Explain how to solve the following system of equations. What is the solution to the system? 2x+2y+z=-5 3x+4y+2z=0 x+3y+2z=1
*January 21, 2015 by Veronica*

**math - linear equation**

How do I write a system of equations that is linear and graph? Thanks
*March 31, 2015 by hy*

**math**

Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Solve for a
*April 2, 2015 by azeez*

**Math**

how would I solve this on a graph? -3x-2y=18 and 3x-y=0 how would my equations look? y=-9+-3/2x y=0+3x correct?????
*November 12, 2015 by Alea*

**math: pre-calculus **

Solve the equations. Log(6x-1) = Log(x+1) + log4
*May 8, 2016 by Nicky*

**Physics **

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 200 N applied to its edge causes the wheel to have an angular acceleration of 1.048 rad/s2. (a) What is the moment of ...
*October 28, 2014 by Brittany *

**math/algebrall**

solve the system of equations:4x - 3y equals 14 and y equals -3x plus 4 i think its either 1(4,10) (2,2)
*August 13, 2008 by Anonymous,*

**calculus**

Find equations of the tangent line and normal line to the curve at the given point. y = x^4 + 2e^x, (0,2)
*October 14, 2008 by Vishnu*

**8th Grade Math**

How do you solve this equations? (xy^-3)^-5 (3x^4)(4x^12) ab^-6 ______ c^0d^-4 x^3y^0(z^-4) Can you please show it step by step? Thanks.
*September 26, 2009 by Kendall*

**math**

Select any two integers between -12 and +12 which will become solutions to a system of two equations.
*November 15, 2009 by staci mae*

**Math**

Is there a difference between solving a system of equations by the algebraic method and the graphical method? Why or why not?
*March 10, 2010 by Craig*

**math**

please can you help me solve the following equations and please can you show your method. thanks 1) 4x+3/5x-6 = x-1/x-6 2) 4x-5/1-6x = x+10/x-6 thanks once again
*October 30, 2010 by peter*

**chemistry**

What is the molecular, ionic, and net ionic equations for Copper(II) sulfate + sodium phosphate?
*November 3, 2010 by Stacy*

**Math**

Use the echelon Method to solve the system of three equations in three unknowns. 2x+y+z=9 -x-y+z=1 3x-y+z=9
*November 6, 2010 by Erin*

**math**

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!
*January 24, 2011 by HELP me please asap!!*

**math**

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!
*January 24, 2011 by HELP me please asap!!*

**need alot of help please math**

hello i need help with system of equations theres 3 only thank you 2x+3y-17 3x+y=31 2(x-3y)=24 y=3x-2 2(x+4)=24 x+y=17
*April 18, 2011 by hannia*