Monday

December 22, 2014

December 22, 2014

Number of results: 5,238

**Chemistry**

When solving Hess law problems,do we need to use all the equations given to get the Htotal or just choose the relevant equations that are related to the final equation required? Let's say there r 5 equations given,but the relevant equations are 3 only ,so we can neglect the ...
*March 23, 2012 by Meenaakshi*

**Math 116**

Consider the following system of equations. y=2x-2 y-2x=9 What can you conclude about the system of equations? a. The system of equations is inconsistent. b. The system of equations is dependent. c. The system of equations is independent. d. none of these.
*June 21, 2013 by Queta*

**Math 1**

Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations? A) The system of equations is inconsistent. B) The system of equations is dependent. C) The system of equations is independent. D) none of these
*October 20, 2013 by sam*

**math**

Consider the following system of equations. y = 2x - 2 y - 2x = 7 What can you conclude about the system of equations? The system of equations is inconsistent. The system of equations is dependent. The system of equations is independent. none of these
*September 8, 2014 by robert*

**Chemistry**

What are the equations for these two equations? Not net ionic equations. a) Nickel (II) chloride and iron b) Sodium and water
*October 12, 2013 by Matt*

**math**

Explain why the simultaneous equations y=1/2x+2 and 2y-x:4 have an infinite number of solutions. What is diffrent about these equations compared with the equations in the first question ( the equations were y=2x+3 and 5y-10x=5)? What is similar? ( include work to prove why and...
*February 24, 2011 by CJ*

**math**

Consider the following system of equations. Y = 3x – 7 Y - 3x = 5 a) The system of equations is inconsistent. b) The system of equations is dependent. c) The system of equations is independent. d) none of these
*January 27, 2013 by monet*

**Algebra**

Translate to a system of equations. DO NOT SOLVE. A nontoxic scouring powder is made up of 4 parts baking soda and 1 part vinegar. How much of each ingredient is needed for a 16-oz mixture? What are the two equations? For most problems, I can easily find the info for the two ...
*February 19, 2009 by Tessa*

**math**

solve the simultaneous equations to find the coordinates of the point of intersection for the pair of lines of the simultaneous equations. Then check the answer by graphing the equations 3x-y=-4 2x-y=0
*October 16, 2010 by Lauren*

**Algebra 2**

1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11
*October 3, 2007 by Audrey*

**Algebra 2**

1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11
*October 4, 2007 by Audrey*

**Algebra 2**

1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11
*October 5, 2007 by Audrey*

**math**

How do you solve system of equations and tell if they're consistant and independant,consistant and dependent,and inconsistant? If you find no solutions then the system is inconsistent. Suppose you have N variables and M equations (N larger than or equal to M). Then, if you ...
*July 27, 2007 by maddie*

**math**

please anwer these: 1) how can i multiply and divide polynomials containing radicals? 2) how can i solve radical equations? 3) how can i solve qudratic equations by factoring ? 4) how can i solve quadratic equations graphically ? thank you !!!!!
*August 13, 2014 by chen*

**algebra**

solve the system of equations by graphing. Then classify the system as consistent or inconsistent and the equations as dependent or independent. x+y=14 x-y=2 What is the solution of the system of equations?
*March 23, 2008 by anaya*

**alegebra**

solve the system of equations by graphing. then classify the system as consistent or inconsistent and the equations as dependent or independent. 3u+v=13 3u=v+29 What is the solution of the system of equations?
*March 23, 2008 by anaya*

**Math**

How do I write the Symmetric Equation of a line given the following parametric equations: (where t is a scalar) x=0t y=0t z=1+1t I know normally I would solve each equation for t and set the equations equal to one another. However, I can not solve for t in the first two ...
*November 3, 2010 by Dwight*

**Math**

How do I write the Symmetric Equation of a line given the following parametric equations: (where t is a scalar) x=0t y=0t z=1+1t I know normally I would solve each equation for t and set the equations equal to one another. However, I can not solve for t in the first two ...
*November 4, 2010 by Dwight*

**College Algebra**

Solve the system of equations with ROWOPS program. I know how to do the first step but after that it gets difficult for me, this is the system of equations: 3x + y - z = 1 x + 2y - z = 0 2x - y + z = 4 I used to be able to do these but now I'm getting a little rusty. Thanks ...
*August 2, 2007 by Rebecca*

**Predicting products for electrolysis**

when you have your 4 different equations to form 4 different possible equations, what two equations do you use for water, O2(aq) + 4H+ + 4e- ----> 2H20 (+1.23) 02 (g) + 2H2O (l) + 4e- ----> 4OH- (+0.40) 2H20 (l) + 2e- ---> h2 (g) + 2OH- (aq) (-0.83) I'm not quite sure...
*January 16, 2007 by Sienna*

**engineering**

Using mechanics of materials principles, (i.e. equations of mechanical equilibrium applied to a free-body diagram), derive the following equations: s’ = s cos2q = s[(1+ cos 2q) / 2] t' = s sinq cosq = s [sin 2q / 2] s=sigma, q=theta, t=tau I have looked in "Theory of ...
*October 18, 2010 by Bob*

**Math - system of equations**

write two other equations that have the same solution as this system od equations. 3x-4y=-14 -x+3y=18 I found the solution to the system it is (6,8) there after how do i go about it?
*September 7, 2010 by Shaila*

**algebra 1**

I'm stuck on this problem. Can you help? -4x-9y=1 -x + 2y =-4 WHat is x and y? Two equations in two unknowns. Here is a quick way to solve them -4x - 9y = 1 4x - 8y = 16 (I got that my multiplying both side so the secind equation that you provided by -4) Now add the two ...
*December 5, 2006 by kyle*

**alegebra**

Solve the system of equations by graphing. Then classift the system as consistent or inconsistent and the equations as dependent or independent. 3x-y=14 3x+4y=-26 What is the solution of the system of equations? Type an ordered pair.N for no solution R for the solution if real...
*March 23, 2008 by anaya*

**Math**

Write two equations that have your two integers as solutions. Show how you built the equations using your integers, numbers used 5 and 8. Solve your system of equations by the addition/subtraction method. Make sure you show the necessary 5 steps.
*September 28, 2011 by Klint*

**Math**

I am stuck on trying to figure out how to do this question. Could someone please show me 5 necessary steps ? Thank you. Here is how the assignment question is worded. Select any two integers between -12 and +12 which will become solutions to a system of two equations. Write ...
*February 9, 2011 by Tiffany*

**Algebra **

To solve the following system of equations by elimination, which step would best to perform first? 1/2a - 1/4b = 1 1/3a + b= 3 A. Add the two equations. B. Subtract the two equations. C. Multiply the first equation by 4. D. Divide the first equation by 3.
*December 17, 2014 by Anonymous*

**math**

how do i solve two step equations? Do you mean two equations in two unknowns? The method of substitution is one way. There is a good tutorial here: http://www.themathpage.com/alg/simultaneous-equations.htm
*January 18, 2007 by megan*

**Trig**

How do you convert rectangular equations into polar equations? If x4−y4=xy , then r2=atan(b); What is a? What is b?
*December 13, 2010 by Audrey*

**Math 8R - HELP!**

Multi-Step Equations Systems of Equations x + y = 0 5x + 2y = -3 this is what i got so far.... x + y = 0 ----> x = 0 - y 5x + 2y(0-y) = -3 please help!!!!
*January 31, 2013 by Lauren *

**PLEASE HELP WITH DIFFERENTIAL EQUATIONS QUESTION??**

Which of these equations have an equilibrium solution. What are they? How are their DE's different? dy/dx=6y-y^2 dy/dx 15-3y
*December 3, 2014 by Francine*

**biology**

I need help figuring out how to balance scientific equations well what are the equations?
*October 30, 2006 by ccw*

**Vectors**

How to solve a system of equations if there are FOUR equations with THREE unknowns?
*August 28, 2013 by vectors123*

**Chemistry**

COMPLETION AND BALANCING OF EQUATIONS Complete and balance the following equations: 1. ZnCl2 + AgNO3
*March 7, 2007 by Muhammad Ahsan KHan*

**Chemistry**

COMPLETION AND BALANCING OF EQUATIONS Complete and balance the following equations: 1. ZnCl2 + AgNO3
*March 7, 2007 by Muhammad Ahsan KHan*

**Math**

Find parametric equations and symmetric equations for the line of intersection of the given planes. x + y + z = 2, x + z = 0 X=1 y = Z= x=, y=
*April 13, 2010 by Mike*

**algebra 2**

Solve system of equations.Describe each step if your solution. W+X+Y+Z=2 2W-X+2y-Z=1 -W+2x-y+2z=-2 3w+x+y-Z=5 Please help I only know how to do this with 3 equations.
*October 16, 2013 by erick*

**Math**

How would I expand this two quadratic equations and find a & x for both of them? Here are my equations: y=a(x+1.5)^2+0 y=a(x+2)^2+1.5
*November 28, 2014 by Alex*

**Algebra Quadratic Equations**

What are the pros and cons of completing the square as a way to solve quadradic equations?
*February 15, 2008 by Marysvoice*

**Math 8 HELP!**

Multi-Step Equations Systems of Equations y = 2x - 4 y = x - 1 please help!!! :'(
*January 30, 2013 by Laruen *

**Math**

My math teacher said to use the FOIL (First Outer Inner Last) property to simplify these quadratic equations I have made from looking at two parabolas. Here are my equations & how would you use the FOIL property on each of the equations and also can someone help me with ...
*December 4, 2014 by Alex*

**quick question regarding equations**

I know there are methods out there but what do you think is the best or easiest method(s) of solving a system of equations. Depends on the coefficients of the equation. If in one of the equations I can solve for one of the variables without having to express it in fractions, I...
*August 14, 2007 by Shawn*

**math,correction**

I have to determine which two equations represent parallel lines. equations are (a) y=(-4)x+2 (b) y=(4)x+2 (c) y= (1/2)x +2 (d) y=(-4)x+3 so the answer would be: A and D yes
*January 28, 2007 by Jasmine20*

**math**

1. Select any two integers between -12 and +12 which will become solutions to a system of two equations. 2. Write two equations that have your two integers as solutions. Show how you built the equations using your integers. Your solution and equations should not be the same ...
*March 31, 2011 by John*

**Vectors - Reiny**

Thank you for the help! "When I solved equations 2 and 3 I got u=0 and t=-1, giving me r = (-2,-3,0) in both r = ... equations." Ok I'll check that. I just have a question...how would you get r = (-2,-3,0) when u = 0 and t = -1?
*April 7, 2008 by Alex*

**Algebra**

Find the number of solutions for this system of equations. 3x + 5y = 20 -2x +5y = 20 How can I do this (and for other systems of equations) without taking all day? Thanks!
*February 26, 2009 by Bella*

**Chemistry**

Write balanced equations for the formation of K4[Ni(NCS)6] starting from an anhydrous sample of nickel(II) nitrate. (3 equations necessary)
*March 11, 2009 by Alice*

**Equations**

Please I want this equations The result K3 P4+S=. ? Where I receive the answer ?
*November 27, 2014 by Safaelhomosany *

**Math**

You are given two equations which are both true, and you are asked to solve for both x and y. You plan to solve this set of equations by substituting part of one equation into the other so you end up with an equation that contains only x's or only y's. The first thing you need...
*October 7, 2008 by Jen*

**Algebra **

40 =15 x x - 20 This is a three part question>> first find the lcd method of solving this equations, and the second ones about cross-multiplying method to solve this equations ,The next question asked would the cross- multiplying method work for all rational equations?? ...
*December 4, 2011 by JERSEYGIRL*

**algebra**

_2__ = ____2___ x-9 x^2-6x-27 Solve the equations Check solutions to the equations (plug the answer back into the original equation.)
*February 19, 2011 by Julie*

**maths..plse helppppppp**

Please help me to find the separate equations of the line represented by following equations: a) x^2+2(cosec a)xy-y^2=0 b) x^2+2xy. tan a-y^2=0
*December 7, 2012 by ragini*

**chemistry**

complete and balance the following molecular equations and then write net ionic equations for each reaction. BaCl2(aq) + K2SO4(aq) KNO3(aq) + HCl(aq)
*June 21, 2011 by chelsea*

**MATH**

system of linear equation The sum of 3 numbers is 14 the largest is 4 times the smallest the sum of the smallest and twice the largest is 18 what are the 3 numbers? show work? A. how many unknowns you have? -how many equations need to be solve for that many unknown? B. what ...
*November 1, 2011 by YANETH*

**College algebra**

system of linear equation The sum of 3 numbers is 14 the largest is 4 times the smallest the sum of the smallest and twice the largest is 18 what are the 3 numbers? show work? A. how many unknowns you have? -how many equations need to be solve for that many unknown? B. what ...
*November 1, 2011 by YANETH*

**Chemistry**

Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) delta H1? MgO(s) + 2HCl(aq) ->MgCl2(aq) + H2O(l) delta H2? To make these equations add up to the formation reaction of MgO, you will need to include the following: H2(g) + 1/2O2(l) delta H =-241.8 kJ Using Hess's Law and manipulating...
*February 14, 2012 by Hannah*

**trigonometry**

I have the trigonometric equations: y=3+2sec(pi/8)(x-3) y=12+4cot(pi/6)(x-1) y=3+7csc(pi/4)(x-1) how do I make these into sine, cosine, and tangent equations so that I can work with them more easily?
*November 7, 2007 by kenny*

**quadratic equations - math**

Use any method to solve the following equations, giving your answers to 2 decimal places where necessary. If an equation has no real roots, state this is so. 1. x2-5x+7=0 2. (3x-4)=(4x-3)2
*August 21, 2008 by anonymos NEEDS HELP!*

**Algrebra-Systems of Equations**

The perimeter of a rectangle is 110cm. The length is 1cm more than twice the width. Write 2 equations that would be used to solve the system.
*January 19, 2012 by Resha*

**Algebra333333!!!**

Choose the ordered pair that is a solution to the system of equations. 3x - y = 9 2x + y = 6 (3,0) (3,-18) (3,-1) (3,1) Once again add the two equations to get 5x = 15 Solve for x and substitute into either equation to find y.
*October 14, 2006 by Margie*

**Chemistry**

I am learning the different types of chemical reactions synthesis, decomposition, single displacement, and double displacement I am also learning skeletal equations word equations and balancing the equations I know how to balance equations if I am given the formula in symbols ...
*March 3, 2014 by Sam*

**Pre-Calculus**

If you solve the following system of equations by substitution, which statement is true? x = z x - 2y + z = 6 2x + y - 2z = 1 A. You can substitute z for x into the second and third equations. B. You can substitute x for z into the second and third equations. C. Both methods ...
*January 22, 2013 by Caroline*

**Math**

True or false, A solution of a system of linear equations is an ordered pair that satisfies one of the equations in the system?
*March 1, 2011 by Megan Ruff*

**Algebra 2 (Diophantine Equations)**

Find all positive integer solutions for 13x + 9y = 190 using Diophantine equations.
*October 5, 2011 by Peter*

**algebra**

Can someone please help. When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? Thanks
*March 1, 2012 by algebra need help*

** math**

I'm trying to solve these equations but it seems I didn't get the correct one. please help if you still can. to solve the equations: 1. 0.4 =32z 2. 8n - 2 = 14 3. 2 (x + 3) = 4 Thanks a lot.
*September 14, 2013 by Nima*

**Math**

Can you Check my work please? Let N(t) be the number of bacteria after t days. Then N(t) = Pa^t for some constants P and a. Measurements indicate that N(4) = 5600 and N(8) = 362, 000. b. Write down two equations for P and a, one when t = 4 and the other when t = 8. c. Use ...
*February 13, 2012 by Walt*

**pre-algebra help**

Determine which two equations represent perpendicular lines. (a) y = 3/10x -3 (b) y= - 10/3x -3 (c) y = -1/5x + 3/10 (d) y = 1/5x – 3/10 Equations (a) and (b) are perpendicular t one another, because the product of the slopes is -1.
*June 10, 2007 by carol*

**Write the equations**

Write the equations that show the processes that describe the first, second, and third ionization energies of a tellurium atom.
*August 17, 2010 by gabyj*

**pre algebra**

Check whether (-4, -12) is a solution of the system of equations. y = 6x + 12 2x - y = 4 When the graphs of two equations are parallel, there are infinitely many solutions. y = x + 4 y = 3x solution: ( , )
*April 11, 2014 by berta*

**algebra ll**

solve the system of equations 4x - 3y= 8 2x+ 5y= 9 mutiple choices are (1,1), (5,2) 1(-4,-10) or (2,-2)and choose the correct description of the system of equations. 2x+3y=10 and 4x+6y equals 20 thank you for the help
*August 11, 2008 by barba*

**MAT101**

Why is it important to understand linear equations in business? What are some examples of how the concept of linear equations are used.
*March 2, 2010 by SEMA , WHY!!!!!!ME*

**precals**

find the equations of the lines to the line whose equations is y-17 / x -13 = -3 /2 If these lines each pass through the point (6,-5) Gracias`
*April 25, 2010 by treeema*

**Calc 3**

Find the parametric equations for the tangent line to the curve with the given parametric equations at specified point. x= e^t y=te^t z=te^(t^2) (1,0,0)
*November 10, 2010 by Rebecca *

**Calc 3**

Find the parametric equations for the tangent line to the curve with the given parametric equations at specified point. x= e^t y=te^t z=te^(t^2) (1,0,0)
*November 10, 2010 by Rebecca *

**Chemistry**

I understand how to balance equations when the full equations are given to me but I don't understand how to write a single replacement reaction. Help Me??
*January 24, 2011 by Jessica*

**algebra**

Try graphing the following two equations. Eq 1 y = 2x + 3 Eq 2 y = 2x + 1 How are these two lines related? What is the solution for this systems of equations?
*March 15, 2011 by bianca, pleeease help i'm lost*

**Quantitative Analysis**

Using Equations Word-process the following five equations: Using Drawing Tool
*March 30, 2013 by Helen*

**Math**

Sustem of equations. I have to solve the system of equations by graphing and solving. Ther are thirty-three students in the Chess Club. There are five more boys than girls in the club. Write and solve a system of equations to find the number of boys and girls in the chess club.
*January 29, 2013 by Alexis *

**College Algebra**

solve systems of equations by graphing... I get how to graph and solve equations but i just dont understand why its coming out wrong u=v 4u=3v-3
*September 23, 2008 by RomanRamirez*

**Math - Quadratics**

Hey, I have some questions. How would I find the domain and range for these equations: y = -5x^2 + 1 y = 3x^2 + 3 x = -x^2 + 5 Also, how would I solve these equations: (2x + 2)^2 = 1 7x = 3x^2 - 1 Thanks for the help!
*January 8, 2009 by G*

**Math**

Please help me about solving kuadratic equations: X^2-2(1-3m)x+7(3+2m)=0 Find m parametter that equations to have the same solves x1=x2,so Discriminant D=b^2-4ac D=0. Please Help me.
*February 3, 2011 by Defrim*

**Alg 1 quadratic equations**

I'm doing quadratic equations x^2 +bx+c =0. I know how to questions like x^2 +17x +42 =0 but this one says, j^2-9jk-10k^2. I have no clue on what I need to do
*October 11, 2011 by Austin*

**algebra**

Can someone help me figure this out please? when you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent? thank you anyone
*March 18, 2012 by don*

**Math**

Which ordered pair is a solution of the system of equations y=x^2-x-20 and y=3x-15? a. (-5,-30) b. (-1,-18) c. (0,5) d. (5,-1) When I solved the system of equations I got 5 and -1. What do I do next?
*May 17, 2009 by Angie*

**algebra**

when you solve a system of equations by the substitution method, how do you determine whether the system of equations is dependent?
*October 28, 2010 by Stephanie*

**algebra**

When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent?
*March 21, 2012 by algebra *

**chemistry**

How to balance a chemical equations quickly? please tell me a shortcut to balance any type of equations.
*September 23, 2012 by J.Nandhini*

**MATH**

Please help me!!!!!!!!!!!!!!!1 Instructions a. If needed, rewrite the following equations in slope-intercept form. * b. Indicate the slope and the y-intercept for each of the equations. c. Using graph paper and a straight edge, graph the equations. 1. y = 3x − 4 2. 2x + ...
*May 24, 2007 by Austin*

**Basic Math**

I forgot how to solve for two variables... Please check if I solved both problems properly! Thank you. Equations: (solve for t and z) 12t + 4z = 80 2t + 4z = 20 My answer: t = 2, z = 14 The steps: (simplified it) z = 20 - 3t, z = 5 - 0.5t (equated both sides to isolate for t) ...
*January 10, 2009 by Anonymous*

**Algebra**

Solving systems of linear equations in 3 variables... 1) 3x-2y+2z=1 2) 2x+5y-5z=7 3) 4x-3y+z=-3 I combined 1 and 3 to get -5x+4y=7 And then i combined 2 and 3 to get -13y+11z=-17. Can that be right? how would you combine those two equations?
*November 13, 2010 by Max*

**Algrebra-Systems of Equations**

Mary is twice as old as her nephew. The sum of their ages is108. Write system of equations that could be used to find there ages.
*January 19, 2012 by Resha*

**Algrebra-Systems of Equations**

Kasey is thinking of 2 munbers. The sum of the two numbers is -18. Their difference is 38. Write a system of equations that can be used to find the numbers.
*January 19, 2012 by Resha*

**Algrebra-Systems of Equations**

Kasey is thinking of 2 munbers. The sum of the two numbers is -18. Their difference is 38. Write a system of equations that can be used to find the numbers.
*January 19, 2012 by Resha*

**Physics. Error equations. Please help!**

These two equations concern a lab on the measurement of E/M by the Brainbridge Method. I need to derive the absolute error for two different equations, the first one is: e/m = 2V/B2R2 treat (e/m) as a SINGLE VARIABLE when doing the derivation. The second is B=8μ0N(I-Io...
*November 20, 2012 by Kyle*

**algebra**

1)What is the 4x^2=y^2+8y+32 answer= either hyperbola or parabola 2)The graph of which equation is a circle? answer= 5x^2+10x+5y=9 3)Solve the system of equations by graphing x^2+y^2=16 and y= -x+4 answer= (4,0),(0,-4) 4)Find the exact solutions of each system of equations x^2...
*August 20, 2007 by Marissa*

**pre-calc**

find real numbers a,b,c so that the graph of the function y=ax^2+bx+c contains the points (-11,4), (2,3) , and (0,1) Write three equations, with each point in one. Then solve the three equations.
*October 24, 2006 by Erica*

**Algebra**

Solving Linear Equations - Elimination Write whether each of these systems of equations has a common solution or not. Explain y = -x + 2 Y = 2x + 1 If you show me one and explain it, then I can probably do the rest...Thanks
*December 18, 2008 by Jessie*

**chemistry**

Metals + cold water. Li, Na, K, Ca. Notes on reactions, equations or space? <<<< dont no what space or equations means. can someone help? Also, say order of reactivity.
*March 14, 2009 by Nabiha*

**Chemistry**

Write the word equations below as chemical equations and balance. copper + sulfuric acid yield copper(II) sulfate+ water + sulfur dioxide
*December 1, 2010 by Pedro*

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