Friday

July 31, 2015

July 31, 2015

Number of results: 112,722

**trig**

solving radical equations... help! 5+¡în+1= n+4
*December 8, 2010 by bob*

**algebra attn Reiny**

Thanks for your help with the solving of the three equations! Yes, it was a typo. I just finished solving it a long way, solving for the 1st 2 equations then the 2nd and 3rd and plugging in variables...etc. etc. Your way gave the same answer, but quicker, does your way always ...
*February 24, 2009 by Terri*

**MATH**

I've been having problems with solving equations that involve fractions with the following problem can I get some help for solving equations that involve fractions? x+1=2/3x Thanks for the help.
*March 14, 2009 by Jen*

**Math - Solving for Trig Equations**

For the following equation, why cannot I not solve it? I keep getting an error. -- 2cosx - 3 = 0 -- I first isolated for "x" 2cosx-3 = 0 (2cosx/2) = (3/2) x = cos^-1(3/2) x = error? why? -- My textbook answer: 30 and 330 degrees --
*November 22, 2007 by Anonymous*

**Math (Solving Equations) **

Find all solutions (answers should be given in simplified form). Some answers may involve the number i. *I will use lowercase l to represent absolute value lines.* 3 lx-1l + 4 = 19 We've never really worked with absolute value in solving equations before. Do I distribute the 3...
*May 17, 2015 by Leah*

**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*

**Trigonometic**

Solving Trigonometic Equations 1)sinx = (4/5) 2) cosx = (-12/13) Solving Trigonometic Equations 1)sinx = (4/5) 2) cosx = (-12/13) What is the question? Solve for x? x= arcsin (4/5) put that in your calculator. Same for the next. For both cases I recognize the sides of well-...
*April 23, 2007 by abdo*

**Business Algebra**

Produce an example of a system of equations to your fellow students and allow them to respond on which method (graphing, substitution, elimination, matrices) they would choose for solving your systems of equations. Be sure to reply to students' responses on their preferred ...
*June 10, 2009 by Redbone*

**Solving Equations with variable on Both Sides**

I need help solving this. I've never been really good with fractions, so, thats probably why.: 3p/8 + 7p/16 - 3/4 = 1/4 + p/16 + 1/2
*May 3, 2008 by Mitch*

**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*

**Trig**

The next two steps in solving this trig identity question are ??? 1/csctheta x costheta x sintheta x sectheta = sinsqtheta arghhh need help please
*December 17, 2011 by Don*

**Math - Solving Trig Equations**

Solve each equation for o is less than and/or equal to theta is less than and/or equal to 360 -- sin^2x = 1 = cos^2x -- Work: cos^2x - cos^2x = 0 0 = 0 -- Textbook Answers: 90 and 270 -- Btw, how would you isolate for cos^2x = 0? Would it be... x = cos^-1 square root of _____ ?
*November 24, 2007 by Anonymous*

**trig**

Solving Trig Functions: How Do You Solve For Sin 7.5 Using Half-Angle and Double-Angle Identities?
*September 22, 2010 by Spy[c]*

**Math: Solving Trig Equation**

9tan (x) - 9 sec^2 (x)/ tan (x)
*March 31, 2013 by Kristi*

**math**

help with solving the system of equations 3x+4y+z=7 2y+z=3 -5x+3y+8z=-31
*March 22, 2010 by Paula*

**Algebra**

Explain the difference between solving a linear equation graphically and solving a system of equations graphically. How would I go about doing this?
*February 18, 2009 by Suzanne*

**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**

1) Why should we clear fractions when solving linear equations and inequalities? Demonstrate how this is done with an example. Why should we clear decimals when solving linear equations and inequalities? Demonstrate how this is done with an example.
*March 21, 2012 by jess*

**math**

solving quadratic equations 8s^3=72s
*May 3, 2009 by Bryan*

**math**

a-2/6 -5 = a+3/3 SOLVE FOR A solving equations with fractions
*July 12, 2012 by jack*

**math**

any helpful hints for solving equations?
*May 18, 2013 by stacy*

**math**

What is the hardest part of solving equations?
*May 18, 2013 by stacy*

**Math 8R - help!!!!!!!!!!!!! **

Multi-Step Equations Solving Equations with Variables on Both Sides 1) 5y + 4 = 4y + 5 11a + 9 = 4a + 30 2w + 3 = 4w - 5 2) 3a - 10 = 4 + a 2x - 1 = x - 3 6n + 4 = n - 11 3) 29r + 4 = 28 + 13r 7x - 11 = -19 + 3x 4) b + 3 = 2b - 7 I'm having a bit trouble and really confused ...
*October 17, 2012 by Laruen*

**Math/ Algebra**

Post your responses to the following. Answer each question in a separate paragraph: Techniques that can simplify solving equations and inequalities are to clear fractions and decimals when solving linear equations and inequalities. 1. Demonstrate how fractions are cleared with...
*June 14, 2010 by Amanda*

**solving equations fractions**

how do i go about solving equations fractions?
*September 7, 2010 by danique*

**trig**

Getting ready for trig semester finals. Can't figure out how they are simplifying these equations. (these are the review not actual test) tanx-sqr3=2tanx and 2sin^2+sinx=0
*December 11, 2011 by Josh*

**Math - Solving Trig Equations**

Solve each equation for 0 is less than and equal to "x" is less than and equal to 360 3sinx = 2cos^{2}x ----- I don't know how to solve this equation...this is what I have, but I don't know if I'm on the right track or not 3sinx = 1 - 2sin^{2}x 3sinx - 1 + 2sin^{2}x = 0 2sin^{...
*November 21, 2007 by Anonymous*

**Math - Solving for Trig Equations**

Solve the following equation for 0 less than and/or equal to "x" less than and/or equal to 360 -- cos^2x - 1 = sin^2x -- Attempt: cos^2x - 1 - sin^2x = 0 cos^2x - 1 - (1 - cos^2x) = 0 cos^2x - 1 - 1 + cos^2x = 0 2cos^2x - 2 = 0 (2cos^2x/2)= (-2/2) cos^2x = -1 cosx = square ...
*November 22, 2007 by Anonymous*

**Math**

Why is it necessary to perform a check when solving rational equations?
*August 5, 2010 by Jayde*

**Math**

Solving quadratic equations by graphing? 3. x2-4x + 6 = 0 4. x2-4x-1=0 5. 4x2-12x + 3 = 0 6. x2-2x-4=0
*February 27, 2011 by Erin*

**Math help **

I need help on these problems. There over solving equations by factoring. 1.4x^2=8
*March 5, 2014 by Anonymous*

**Math - Solving Trig Equations**

What am I doing wrong? Equation: sin2x = 2cos2x Answers: 90 and 270 .... My Work: 2sin(x)cos(x) = 2cos(2x) sin(x) cos(x) = cos(2x) sin(x) cos(x) = 2cos^2(x) - 1 cos(x) (+/-)\sqrt{1 - cos^2(x)} = 2cos^2(x) - 1 cos^2(x)(1 - cos^2(x)) = 4cos^4(x) - 4cos^2(x) + 1 5cos^4(x) - 5cos^...
*November 24, 2007 by Anonymous*

**algebra**

Explain the difference between solving a system of equations by the algebraic method and the graphical method. Someone also wants to know why there are different methods for solving the same problem-what would you tell him? Tiffany Oakes
*July 12, 2010 by kiMBERLY*

**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 *

**math (trig)**

Im having problems solving this equation: 2sin(x) = cos(x) + 2 I keep getting an imaginary number..:/
*December 18, 2007 by jess*

**Math**

I am having probles with solving systems of equations by graphing please help!! y=4+2/3x 2x=3y
*May 13, 2009 by Gaby*

**math**

I'm doing solving quadratic equations.I need help with couple of problems. k(k+5)=0,4r^2=100
*April 7, 2010 by lauren*

**Math**

Solving systems of equations with three variables? What is the solution to the system? 1] x+y+z=-3 2] 3y-z=4 3] 2x-y-2z=-5
*May 30, 2011 by Kori*

**Math help**

I need help on these problems. There over solving equations by factoring. Don't get it at all. 1. (Y+5)(Y-7)=0 2. 2n(n-20)=0 3. (2t-3)(3t-2)=0 4. (2u+7)(3u-1)=0
*March 4, 2014 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*

**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*

**math**

what is.7 of 39.4????? 39.4*.7=27.58 Having trouble solving equations with two variables..both unknown
*March 20, 2007 by Caitlyn*

**math**

im solving nonlinear equations they are y = x^2 y - 2 = x so i plugged in the x^2 to get x^2 - x = 2 then i factored out an x to get x(x-1) = 2 now what would i do?
*October 4, 2009 by lyne*

**Math C30**

Solving Equations Containing Circular Functions : Solve 2cos sq x =1
*November 1, 2011 by don*

**Math C30**

Solving Equations Containing Circular Functions ... Solve 2cos^2=1
*November 2, 2011 by don*

**Math- Urgent**

Solving Equations -7+b/15=-6 What does b equal? Please show all work.
*August 12, 2013 by j*

**Math- Urgent**

Solving Equations 3=r/16+4 What does r equal? Please show all work.
*August 12, 2013 by j*

**Algebra**

I am solving for sytems of equations using the elimination method. Book says answers are 0,-1. I have tried solving for both x & y using both the 5 and 25 . I am not getting the 0,1 as my answer. 5x-5y=5 25x-25y=22
*April 1, 2008 by G*

**MATH**

Solving by graphing DQ 1 Solving by substitution Solving by elimination Which method do you think would be best to solve this system? y=10x-8 y=1/2x+5
*October 19, 2010 by Anonymous*

**Math-Help**

Consider the pair of linear equations below. 4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B: Do the two equations have one solution, no solution, or infinitely many solution? Explain. Part C: How can you verify your answers to Part A and B ...
*April 1, 2013 by Jayson Angole*

**math**

Consider the pair of linear equations below. 4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B: Do the two equations have one solution, no solution, or infinitely many solution? Explain. Part C: How can you verify your answers to Part A and B ...
*April 2, 2013 by Jayson Angole*

**Math**

Can someone please explain to me exactly what type of math this is (e.g. radicals, linear equations) and how I would go about solving this?
*February 23, 2014 by Anonymous*

**Math**

Solving First degree equations. 0.2x-0.3=0.1x+5 I am having a hard time entering this into my TI-84
*January 26, 2011 by Lisa*

**Math help**

I need help on these problems. There over solving equations by factoring. 1. 4x^2=9 2. M^2-36=16M 3. R^2+9=10r 4. 6s^2=17s-12
*March 5, 2014 by Anonymous*

**math**

Hi, How could I find the line of best fit? I plotted each of the equations I had for a problem I'm solving. The equations were linear (y=ax+b) and quadratic (y=ax+b+c). I'm supposed to find out which line is the most appropriate for the data that is given to me. When looking ...
*March 17, 2008 by Irene*

**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*

**Trig**

Help with solving radical fractions.
*September 15, 2009 by Anonymous*

**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*

**math (final trig problem)**

Solve for x on the interval [0,π/2): cos^3(2x) + 3cos^2(2x) + 3cos(2x) = 4 I havent done trig for a while so what exactly does that mean in solving for x on that interval and how would i go about doing that? Where are you getting these tough trig questions?? how about ...
*April 30, 2007 by jacob*

**Math**

When solving exponential equations using logarithms. How would you sold one that has a fraction as the exponent such as: x^(1/4)-81=0
*November 19, 2009 by Preston *

**Math (Grade 9)**

Solving Linear Equations: x _ - 3 = 5 7 I know you have to add three to each side, but after that im not sure what to do,, please help!
*June 13, 2011 by Maddison*

**Math C30**

Last Question disregard .. ooops Solving Equations Containing Circular Functions .. Solve 2cos^2x=1
*November 2, 2011 by don*

**Differential Equations!**

I'm struggling solving this separable differential equations: (du/dv) = ((uv+u)/(uv+v)) I multiplied both sides by dv to get on the left side just du and cancel out dv, but after that don't know where to go. I've tried integration by parts but it doesn't look right! Any help ...
*January 13, 2013 by Massiel*

**solving equations**

I need help understanding the concept of the value of an inequality DQ 2 in week 3 of math 116. any suggestions would be great!
*August 14, 2009 by cassie11*

**math 20 system of equations**

I have been solving system of equations graphically and using addition and subtraction and now I'm being asked: Give any linear system of two equation that has a solution of (3,5). Does it have to be in y=mx+b form and if so how do I do it? I've been trying to find an example ...
*October 12, 2010 by Sandi*

**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**

Solving quadratic equations by completing the square. Could you show me every step how to do it. That way I'll know probably know how to do the other ones. With that method you use. 1/2x^2 + x -13 = 0
*October 30, 2009 by Basil*

**algebra**

solving equations -x^2, if x=-1, etc
*October 14, 2010 by mike*

**solving rational equations**

4-a-5/a+5=a^2-15/a+5
*July 9, 2011 by karen*

**solving equations by sibstitution**

-2x+6y=6 -7x+8y=-5
*January 5, 2013 by Anonymous*

**Solving Rational Equations**

4x/x-5=8/5-x
*February 27, 2013 by austin*

**Economic Math**

Suppose the supply and demand for milk is described by the following equations: Qd=600-100P, Qs = -150+150P, where P is price in dollars . Qd is quantity demanded in millions of gallons per year. A. Create supply and demand tables corresponding to these equations. B. Graph ...
*May 8, 2015 by Abraham*

**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*

**solving polynomial equations**

please help 3(n+1)=5(n-3) thank you
*March 27, 2010 by dan*

**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*

**Physics**

You are given vectors A = 5.0i - 6.5j and B = -2.5i + 7.0j. A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 15.0. Find the x and y components to vector C. Here's the step by step from the book that I'm having a...
*August 30, 2014 by Vectors*

**Math**

Can u please guide me on solving these two equations please. Thank You 3.6-7.6 (-8.3)-11.4
*August 27, 2009 by Liz*

**Math Question**

Hi, I need help with a math question. Thank you to whoever helps me! :) When solving a system of 2 equations and 2 unknowns using the substitution method, what is the ideal value of the coefficient of the isolated variable?
*January 7, 2014 by Sara*

**math,correction**

Graph each of the following equations by first solving for y. 2x – 3y = 12 so it would be: y = 2/3x – 4 and the solutions points would be: So (-3,-6) is a solution
*January 14, 2007 by jasmine20*

**math**

How do you use RECIPROCALS to solve equations without variables. I do not want the answer to the equation. I want the steps to solving it with RECIPROCALS. Thanks! ex. 37.6 + 2.5 ----------- 48(7.8 - 10.5)
*February 23, 2009 by Lallie*

**calculus**

solve (12/t)+t-8=0 (solving rational equations)
*November 4, 2010 by carli*

**algebra**

Solving equations. PLEASE HELP! (4)/(x+2) - (4)/(x) __________________ = 1 2
*January 19, 2011 by Amy*

**equations of tangents and normals**

hi, i'd really appreciate some help solving this question! I am completely at loss here :/ The question is to: Find the equation of the normal to y=loge(x+2) which is parallel to the line with equation y+3x-5=0 I am fine at solving these sorts of equations when they give me ...
*May 20, 2007 by elle*

**Trig**

Use a cofunction to write an expression equal to csc(4ð/11). I need help solving this problem. Thank You
*May 11, 2011 by Rachal*

**Math**

Solving Equations with Grouping Symbols: 3(g-3)=6 Please explain how to do this Rules: Use Distributive Property Combine like terms Solve by using inverse operations
*January 18, 2012 by Cassie*

**trig **

1st-the reason i keep change my name because some of my friends are using my computer by their own name to asked questions. we are having a hard time solving each trig problems 2nd- if sin theta=0.6 and 90 degree <theta < 180 degree, find the exact value of sin 2 theta. ...
*May 8, 2011 by minh *

**math:(**

how do you compare the symbolic method for solving linear equations to the method of using a table? PLEASE HELP MY BUS COMES IN 30 MINUTES!!!
*April 6, 2012 by malisa*

**algebra equations**

i need help solving the following: 10h = 8h + 6 and 6x + 2 = 3x - 1
*October 21, 2008 by Natalie*

**solving systems of equations with 3 variables**

What is the solution to the system? x-2y=1 x-3y+z=0 2x-2z=18
*May 30, 2011 by Kori*

**algebra**

Solve the equations symbolically. 3x+7/4 + 3x-7/5 =-8/5 6(7x-1)+5=24+3x How do I go about solving them?
*January 31, 2013 by Anonymous*

**Algebra**

I need some help solving this system of equations: 5x - y = 18 –4x – 2y = –6
*July 20, 2014 by Math*

**Trig Proofs! **

I'm having trouble solving this proof. Can you help? cos^3+sin^3/cosx+sinx = 1-sinxcosx Thanks!:)
*March 8, 2012 by Kels.*

**Algebra**

I am solving sytems of equations algrbraically. I have tried several times and I am not comming up with he answers for the following three equations that the book gives. 1) 4x-2y=-5 -x+2y=2 Answer in book: -1,1/2 2) -5x+2y=10 5x-3y=-10 Answer in book: -2,0 3) 2x-y=2 -2y+4y=-5 ...
*March 27, 2008 by G*

**System of Linear Equations**

A medical supply company has 1150 worker-hours for production, maintenance, and inspection. Using this and other factors, the number of hours used for each operation, P, M, and I, respectively, is found by solving the following system of equations. Find P, M and I. P + M + I...
*July 8, 2011 by neeha*

**algebra**

ok, Thanks for the help on that last one but can you help me with these: solving equations with the variable on each side. 1.) 6+2(3j-2)=4(1+j) 2.) 9(4b-1)=2(9b+3) please help
*October 14, 2009 by Presley*

**algebra 1**

what are some methods of solving systems of linear equations
*January 18, 2013 by da *

**Algebra 1**

When solving a system of equations, how do you determine which method to use?
*December 18, 2014 by Steve*

**Math**

So I've been working on solving this system by addition/subtraction and I just can't get the right answer. Her is the system of equations I was given to solve by add/sub: 3x – y = –12 x + 2y = –18
*July 20, 2014 by jririfi*

**Algebra Quadratic Equations**

I am trying to define the different appraoches to solving quadratic equations. My book says using quadratic formula, completing the sqaure and factoring. I thought completing the square would be by facotring? How are these two different?
*February 5, 2008 by Marysvoice*

**bobpursly & countiblis,math**

I thought that we can solve anything with equations is it always polynomials. Isn't this the same thing as finding the unknown for an equation. As i said in my previous message or am i wrong. Also what about the rational expressions what are some challenges about working with ...
*March 5, 2007 by jas20*