Friday

May 27, 2016
Number of results: 44,152

**mathematics: algebra;equations**

wuts the answer for -12 + 5u= -48
*May 23, 2008 by alisa*

**Mathematics**

Q 1 . Change the following polar equations into Cartesian equations: (a) r = a sin 2 A (b) A=π/4
*January 10, 2016 by Naushad K*

**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*

**Mathematics**

Among 500 freshmen pursuing a business degree at a university, 313 are enrolled in an economics course, 205 are enrolled in a mathematics course, and 153 are enrolled in both an economics and a mathematics course. What is the probability that a freshman selected at random from...
*February 20, 2011 by Anonymous*

**Mathematics**

x-z=7 x+y=3 z-y=6 For the above system of three equations x= ?
*July 17, 2012 by Willie*

**Maths**

what are the meanings of Mathematics of Buying and Mathematics of Selling, using language from the Business Mathematics aspect.
*December 26, 2011 by ummu*

**Mathematics**

3x - 21 = 2y 3y = 84 - 6x Using the two equations above, solve for y. A.11 B.35 C.-6 D.6
*March 13, 2012 by Elysa*

**mathematics**

how to solve exponatins equations by trial and error
*March 3, 2013 by nolusindiso*

**Mathematics**

Parametric Equations x = 9s^2 - 1 y = 1 - 8s^3 Find the cartesian equation?
*March 2, 2016 by Tony*

**mathematics **

If the line l has parametric equations x=5-3t, y=-2+t, z=1+9t, find the parametric equations for the line through p(5,4,-3) that is parallel to l.
*June 27, 2014 by malipa*

**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*

**mathematics**

use inverse method to solve the system of linear equations x+y+z-4 =0 2x-3y+4y-33=0 3x -2y -2z -2= 0
*July 28, 2011 by victor1 *

**mathematics**

Determine the equations of a straight line passing through (-6;-2) and pependicular to 3x+2y=6
*August 5, 2013 by Perfect*

**mathematics**

Determine the equations of a straight line passing through (-6;-2) and pependicular to 3x+2y=6
*August 5, 2013 by Perfect*

**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*

**probability**

out of 250 students interviewed at a community college, 90 were taking mathematics but not computer science, 160 were taking mathematics, and 50 were taking neither mathematics nor computer science. Find the probability that a student chosen at random was a. taking just ...
*October 27, 2011 by Emma*

**Additional Mathematics**

Showing your working clearly, solve the following simultaneous equations: y+5x=3 2x^2-1=3xy+y^2
*December 18, 2012 by Victoria*

**mathematics **

Solve the following differential equations: (I). Cos x dy/dx + ysin x= sec^2 x (II). Y"-10y' + 41y=0
*June 27, 2014 by mitesh*

**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*

**FOR MATHMATE**

Media services charges $40 for a phone and 20/mth for its economy plan. It says to find a model that determines the total cost, C(t), of operationg a media Services phone for t months. I think the answer should be in this equation - y = mx+b. Not sure. Algebra/Equations,...
*November 26, 2010 by AMY*

**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*

**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*

**algebra 2**

How does writing equivalent equations help you solve a system of equations?
*September 25, 2015 by cj*

**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*

**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*

**Mathematics**

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**

_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*

**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*

**algebra**

How do I do substitution equations out of the equations in the system, pick the one that has the least amount of funky numbers. then make that equation equal to either x or y(or any other variable dependin on what kind of systems youre doing, usually just x and y in algebra 1...
*November 30, 2006 by Adraen*

**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*

**Maths**

Among the examinees in an examination 30%, 35% and 45% failed in Statistics, in Mathematics, and in at least one of the subjects respectively. An examinee is selected at random. Find the probabilities that a. He failed in Mathematics only b. He passed in Statistics, if it is ...
*October 9, 2010 by Neeraj Bhanot*

**IGNOU probability**

Among the examinees in an examination 30%, 35% and 45% failed in Statistics, in Mathematics, and in at least one of the subjects respectively. An examinee is selected at random. Find the probabilities that a. He failed in Mathematics only b. He passed in Statistics, if it is ...
*October 15, 2010 by Dharmenra*

**Mathematics**

Solve the following system of linear equations using the matrix inverse method. \begin{array}{ccc} 3x+2y&=&7 \\ 4x+3y&=&10\end{array}
*September 9, 2013 by Teroataa*

**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*

**Mathematics**

How do i solve the pair of simultaneous equations y=x^2-3x-12 and y=2x-16 and epxress y=x^2-3x-12 in the form y=(x-h^2)+k, where h and k are constants Hence determine the minimum value of the function y=x^2-3x-12 I have a few of these to do, so if someone can just show me how ...
*June 25, 2009 by Raquel*

**math algebra 1**

Who is the inventor of the FOIL method? some one answer me!! The history of mathematics in India is ancient. The Hindu Vedic tradition is an oral tradition of knowledge passed down in short verses, dating to before the invention of paper. The Vedas encompass a broad spectrum ...
*May 21, 2007 by amy*

**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*

**mathematics-abstract equations**

x+y+√z=148 x+√y+z=82 √x+y+z=98 find x,y,z given that x,y,z are all positive integers. Please i need the solution #thanks
*April 20, 2016 by P1*

**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 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*

**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*

**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*

**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*

**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*

**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*

**Algebra**

Given the equations y=16 and y=3. Determine the slope and y-intercept if any exist. I have determined that the slope is 0 for both equations because it is a horizontal line, but I don't know what the y-intercepts are?
*February 6, 2016 by David *

**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**

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 *

**Algebra**

I can find no solution to this system of equations. Solve the system of equations using the substitution method 2x + 4y = -2 2x - y = 4
*January 7, 2015 by slomo*

**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*

**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*

**algebra 2**

for the equations y=x and y=|x|....i need help on give one similarity and one difference for the equations and graphs
*January 18, 2008 by logan*

**Algebra (Quadratic Equations)**

Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < - X ^ 2 X^2 + Y^2 < 16
*April 27, 2011 by Christina*

**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*

**Mathematics**

write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.
*July 10, 2012 by INDIANA*

**Mathematics**

write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.
*July 11, 2012 by INDIANA*

**Mathematics**

write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.
*July 12, 2012 by INDIANA*

**Mathematics **

write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.
*July 16, 2012 by SAMARA*

**Mathematics**

write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.
*July 20, 2012 by Samara *

**Algebra**

Please help me to solve these two equations step by step. They are quadratic equations 1).2x^2+9x+4=0 2).5x^2=-7x
*January 18, 2012 by Daleda*

**Algebra**

Solve the system of equations: First:x+3y=5 Second:3x-y=5 multiply the second equation by 3 then add both equations(I know I have it wrong somewhere I just guessed at the solution and it worked. I got (2,1)
*February 26, 2008 by Jon*

**mathematics**

how can you do the lcm to somethimg like 12000 without having to do all of that mathematics just to make it quicker?
*September 10, 2007 by alana*

**University studies**

According to the Center for Mathematics Excellence, which of the following is a math myth? A. Knowing the rules and how to use them is the most important part of math. B. Even people who are highly skilled in mathematics and science find these subjects to be challenging C. ...
*November 3, 2011 by lil Bee*

**mathematics**

how do I cope with intermediate mathematics e.g log rhythms?
*October 16, 2012 by Aron*

**Algebra**

Find the number of the solutions to each system. a. 4x-y+1=0 4x-y+3=0 b. 2x-y+4=0 4x-2y+8=0 Write a question that can be solved using a system of linear equations. Solve the following system of equations by graphing: y=x+3 and y=-2x-3
*January 13, 2016 by LadyPhantomhive*

**Math**

In a class of 550 students, students may take all, none, or a combination of courses as follows.? Draw a Venn diagram to find how many students are not in any of these courses. Mathematics-280 Science-200 Technology-230 Mathematics and Technology-110 Science and Technology-100...
*June 9, 2009 by Angie*

**Discrete Mathematics**

The augmented matrix A represents a system of three real-valued equations in three unknowns. Which of the answer choices would result from the usual first step of applying Gauss-Jordan elimination?
*July 30, 2013 by Joy*

**Discrete Mathematics**

15. The augmented matrix A represents a system of three real-valued equations in three unknowns. Which of the answer choices would result from the usual first step of applying Gauss-Jordan elimination? A = (1 4 2 3) A = (2 9 13 18) A = (3 10 8 15)
*July 30, 2013 by Joy*

**algebra 1**

Got a test tomorrow... Say you have a system of equations (linear), that you can solve using substitution, graphing, or elimination. Without solving the equations, can you tell if there is one solution, many solutions, or no solution?
*February 27, 2008 by Lily*

**Algebra 2 (Diophantine Equations)**

Solve 5x + 12y = 47 using Diophantine equations.
*October 7, 2011 by Peter*

**Algebra**

Help Pleasee! Rational Exponet equations 1. 3x^5/2- 9 = 0 2. (2x+3)^1/2=4 Equations With rational expressions: 1. 3/x+3 - 1/x-2 = 5/2x+6
*August 21, 2012 by Unknown*

**algebra uno help + check?**

So, I've got these other sets of problems, that are telling me to write equivilant equations for the equations given, heres what I think. 1) x+y=-10 -5+5=10 -5(2)+10 2) 5x+10y=15 5x(3)=15 5x+10=15 3)-x+2y=9 y=3(3)=9 3+6=9 Heres what I need YOU tutors to help me with: Could you...
*November 29, 2010 by Allyson*

**ALGEBRA**

how many permutations are there of the following word. mathematics
*November 16, 2011 by MONICA*

**mathematics-Algebra**

3^x=9x please show workings
*March 16, 2016 by p1*

**math**

500 students sat for an examination in mathematics,physics and chemistry.45 passed all the three subject,60 passed mathematics and chemistry,70 passed physics and chemistry,50 passed mathematics and chemistry,10 passed in mathematics,80 passed in chemistry and 35 passed at ...
*November 13, 2011 by damilola*

**Math Essay**

I have to write this paper over the history of math, can you please give me some other websites that I can use? So far I have one website from wikipedia. Also, can you please read my introduction? As of today, there are plenty of new developments in the area of Mathematics. ...
*November 9, 2007 by Soly*

**mathematics**

x,y and z are complex numbers that satisfy the equations x+y+z=2, xy+yz+zx=3 and xyz=4. Given that 1/(1−x−yz)+1(1−y−zx)+1(1−z−xy)=ab, where a and b are coprime positive integers, what is the value of a+b?
*April 18, 2013 by Mathsfreak*

**algebra**

Can someone please help. Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations. Thanks
*March 1, 2012 by algebra need help*

**Algebra**

6. y = 2x - 1 and y = x + 3 ***A. (4,7) B. (7, 4) C. (-7, -4) D. infinite solutions 7. y = 4x and y + x = 5 A. (-4, 1) B. (1, 4) C. (-3, 2) ***D. (2,3) 8. What will the graph look like for a system of equations that has no solution? A. The lines will be perpendicular. ***B. ...
*March 1, 2016 by Leet Speaker*

**algebra**

I need help. Can someone help me please. Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations. Thank you
*March 18, 2012 by don*

**Algebra 2 (Quadratic Equations)**

Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < -X^2 X^2 + Y^2 < 16 I'm not sure how to actually work this problem out. Can anyone help me with this problem please.
*April 18, 2012 by Greg*

**mathematics**

why would someone study mathematics
*April 30, 2009 by stac*

**algebra**

When I subsitute 5x+3 into the equation I get x=1/5 and y=2 is this correct? Try plugging in your final values for x and y into both of the original equations. If and only if the equations are true, then your answers are correct.
*March 20, 2007 by Tony*

**algebra**

Solve the system of linear equations by graphing 3x+y=0 2x-y=5 Graph the system What is the solution of the system of equations?
*March 10, 2015 by Shannon*

**Mathematics**

A survey of 100 students produced the following statics: 32 study mathematics, 20 study physics, 45 study Biology, 15 study mathematics and biology, 7 study mathematics and physics, 10 study physics and Biology, 30 do not study any of the three subjects 1, Present the ...
*November 17, 2015 by Mesh*

**Algebra**

When equations have infinitely many solutions, How would you know this? also, when working on equations that has no solutions, How would I know this? If posible can you give me examples of each. Thank you
*September 10, 2008 by Kim*

**College Algebra**

Solve the system of equations. Then classify the system. 7x-7y= -42 -7y-7x=42 What is the solution of the system? Is the system inconsistent or consistent? Is the equations dependent or independent?
*November 18, 2009 by LeAnn/Please help me*

**algebra**

Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations.
*March 21, 2012 by algebra *

**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*

**ALGEBRA/EQUATION**

I believe I have the answers already. Just need confirmation please! Solve the following system of equations. x + 2y = 5 x = 2 - 2 y; For the first equation, I canceled out the x and divided by 2 on both sides. So y = 5 - x/ y. For the second equations, this is what I got. x...
*December 14, 2010 by Amy*

**Algebra 2**

how do i do these problems???? Graph each pair of equations in the same coordinate plane. Find the coordinates of the point where the graphs intersect. Then show by substitution that the coordinate satisfy both equations. 1. 2x + 5=0 2x + y=8 Graph each equation 2. y=|x| HELP...
*August 17, 2010 by Jessica*

**Algebra**

Find all solutions to the following system of equations: x + 3y + 2z = 6 -3x + y + 5z = 29 -2x - 3y + z = 14 This just did not work out for me. Here is my work: I first solved Equation #1 for x. x = -3y - 2z + 6 Then, I did substitution, and replaced x for -3y - 2z + 6 in ...
*February 25, 2009 by Anneliese*

**Algebra**

Solving Linear Equations and Inequalities Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) 4x - 3y + 5z =3 (2) 3x - 2y + 5z=1 (3) my teacher gave me the answer she said the solution set for this should be...
*April 25, 2016 by Clyde*

**7th grade**

explain the usefulness of algebra in modern mathematics.
*November 9, 2008 by greg*