Monday

February 20, 2017
Number of results: 138,207

**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*

**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*

**Algebra I DONT KNOW HOW TO DO 3 VARIABLES**

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*

**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*

**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 (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*

**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*

**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*

**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, that's 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*

**Algebra SOLVING LINEAR EQUATIONS AND INEQUALITIES**

Please help Im am Grade 5 and my teacher is letting me do this. 1. Solve the solution by using elimination and substitution 3/x - 2/y = 14 6/x + 3/y = 7 2. Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) ...

*April 25, 2016 by Clyde*

**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*

**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*

**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*

**math**

help with solving the system of equations 3x+4y+z=7 2y+z=3 -5x+3y+8z=-31

*March 22, 2010 by Paula*

**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*

**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 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**

Solving system of equations by substitution. 52. {5x-2/4+1/2=3y+2/2;7y+3/3=x/2+7/3

*November 20, 2016 by Carly*

**solving equations fractions**

how do i go about solving equations fractions?

*September 7, 2010 by danique*

**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*

**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**

2.6(m+1.9)=6.5 Solving equations involving distributing property

*October 22, 2016 by Wossum*

**math**

1 1/2(n-4 1/2)=12 Solving equations involving the distributing property

*October 22, 2016 by Wossum*

**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 - 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**

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 rational equations solve check your answer 5/3x+1=2

*October 10, 2016 by Steve*

**math (trig)**

Im having problems solving this equation: 2sin(x) = cos(x) + 2 I keep getting an imaginary number..:/

*December 18, 2007 by jess*

**Silmultaneous Equations**

Need a bit of help solving the following equations. sqrt(5/8-(sqrt(5)/8))LH+cos (43pi/180)RH = 0 and 1/4(1+sqrt(5)LH+sin(43pi/180)RH-2g=0 What is the best way to start when trying to combine these equations? Thanks

*December 5, 2016 by Mat*

**math**

Anthony has 7 bills. All the bills are tens or twenties. The bills Anthony has total $100 in value. How many of each hill does Anthony have? Pretty sure the solving method is solving systems of equations but you have to isolate the variables and stuff.. please help!!

*April 19, 2016 by claire*

**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*

**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*

**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 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**

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**

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*

**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**

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*

**Trig**

Help with solving radical fractions.

*September 15, 2009 by Anonymous*

**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**

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*

**Math**

PLEASE CHACK MY ANSWER!!! Discussion for Applications of Linear Systems When solving a system of equations, how do you determine which method to use? My answer: I determine which method to use by looking at the equations. If both equations are in slope-intercept form, I choose...

*December 15, 2016 by Matthew*

**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*

**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*

**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**

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*

**Math**

So I'm doing solving system of equations, 2x+y=5 4x+2y=10 I found no solution that would fit it therefore they are parallel to each other. Am I correct?

*April 18, 2016 by Steven*

**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*

**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*

**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**

Hello, I need help solving two systems of equations. I'm not sure how to solve them. They are: 7w+e=8 e+5=9 And the second one is: 7e=107-6d 7e+8d=117 Thanks!

*September 8, 2016 by Julie*

**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*

**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*

**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*

**solving polynomial equations**

please help 3(n+1)=5(n-3) thank you

*March 27, 2010 by dan*

**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*

**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*

**Algebra**

Create a system of equations that includes one linear equation and one quadratic equation. Part 1. Show all work to solving your system of equations algebraically. Part 2. Graph your system of equations, and show the solution graphically to verify your solution.

*June 9, 2016 by Sally*

**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*

**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*

**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*

**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*

**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*

**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*

**Solving Trig Equations**

Solve for x in the interval [-pi,0] a) sin^2x = 3/4 I know that you have +root3/2 and -root3/2 and the positive one gives you an error when doing the inverse of sin, but im confused about the -root3/2. I found that one of the answers of x is -pi/3 (-60 degrees) which fits my ...

*November 27, 2015 by Mandy*

**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*

**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*

**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*

**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*