Thursday

September 3, 2015
Number of results: 25,549

**physics repost**

I am still trying to solve for H in this equation but I am still lost MgH = (1/2)*k*(H-2-10)^2 + Mg*2 I was told to expand the square on the right, gather terms, put it in the standard quadratic form, and use the quadratic formula, but I don't know how. Should it be Mgh=(H-12...
*April 24, 2008 by Chris Adison*

**Precalculus**

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1 a) Put the equation in standard quadratic trig equation form. Why is it 7sin^2x - 8sinx + 1 =0?
*January 27, 2012 by Melissa*

**college**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2 + bx + c =0 The solutions are -10, 3 The equation is blank = 0
*September 4, 2009 by Dana*

**Algebra**

Solve the equation. Use factoring or the quadratic formula, whichever is appropriate. Try factoring first. If you have any difficulty factoring, then go right to the quadratic formula. (Enter your answers as a comma-separated list.) (x+2)^2 + (x-7)(x-2)=16
*April 17, 2015 by Merty*

**Algebra**

how to solve this: what is the largest rectangular area that can be enclosed with 400 ft of fencing? What are the dimensions of the rectangle? Could someone write the equation. I know how to solve it without an equation but I want to know the equation. would it be a quadratic?
*November 7, 2010 by Amy*

**algebra**

solve for x (24+2x)(10+2x) - 240 = 152 First multiply. 24(10) = ___ 2x (2x) = ____ Now subtract 240. Can you finish the problem from here? dont i need to put this in equatic equation to solve for x. cause i need to find the width of a small rectangle inside a bigger triangle. ...
*August 3, 2007 by q*

**ALGEBRA**

how do i solve this linear equation: 3x/4 + 6 = -12 (3x over 4 is a fraction) and this quadratic equation..... -4x squared = 0??
*September 10, 2009 by ggift*

**maths**

The following quadratic equation has the integer solutions x^2+5x-6=0 what is the positive solution of the equation
*March 29, 2011 by elizabeth*

**Math**

Could someone help me with this equation? Use the quadratic formula to solve the equation... 2x^2 - x = -10
*June 10, 2010 by Punkie*

**Equation**

-4x (little 2) =0 Not sure what name the technique means. I know this is a Quadratic Equation.
*June 19, 2010 by Lisa*

**Algebra1 HELP PLEASE**

The solutions to a quadratic equation are -1 and 7. What is the equation of its axis of symmetry?
*July 3, 2013 by lisa*

**maths**

quadratic equation solve the equation by factorization 27x^2 - 126x = 0 So x=? or x=?
*August 1, 2013 by gean*

**Algebra**

The following equation is quadratic. f(x)=(x-7)(3x-2) What are the x-intercepts of the graph of the related equation y=(x-7)(3x+2)? A) -7 and 2/3 B) -7 and 3/2 C) -3/2 and 7 D) -2/3 and 7
*April 30, 2015 by Ashley*

**Algebra**

Please show me how to solve this problem. 8/x^2-16 + 3/4 = 1/x-4 multiply each of the terms by x^2, collect your like terms and bring them all to the left side. You will have a quadratic equation. BTW, since you did not use brackets I will assume your last term is (1/x)-4 and ...
*May 8, 2007 by Marie*

**Algebra help**

Match the equation 4x^6-2x^3+1=0. With a substitution from the column that could be used to reduced the equation to quadratic form: a) u=x^-1/3 b) u=x^1/3 c) u=x^-2 d) u=x^2 e) u=x^-2/3 f) u=x^3 g) u=x^2/3 h) u= x^4
*March 24, 2011 by Miguel*

**Algebra help**

Match the equation 4x^6-2x^3+1=0. With a substitution from the column that could be used to reduced the equation to quadratic form: a) u=x^-1/3 b) u=x^1/3 c) u=x^-2 d) u=x^2 e) u=x^-2/3 f) u=x^3 g) u=x^2/3 h) u= x^4
*March 24, 2011 by Miguel*

**Math**

1)If the roots of a quadratic equation are -2 and 3, the equation can be written as A) (x+2)(x+3) B) (x-2)(x+3)** C) (x+2)(x-2) D) (x-2)(x-3) Is the answer B? If someone could help me that would be great.
*April 29, 2015 by Alan*

**math,help,algebra I**

I need help can someone help me get unstuck and let me know if i am correct.thank you. solve by completing the square. 4x^2+2x-3=0 this is what i am doing: i used the quadratic equation. so where i am is in this step: x = (-2 (+-) sqrt (-44))/(8) from this point i am stuck: ...
*April 14, 2007 by jasmine20*

**math**

Use quadratic formula to solve each equation 3k^2+6=6 I get 3/2 but I can't seem to get the other half of the equation such as x=3.7 or .26 etc...
*May 21, 2011 by beli*

**algebra2**

If the discriminant of a quadratic equation is equal to zero, how many real solutions does the equation have? A. 0 B. 1 C. 2 D. 3 please help!!
*June 25, 2012 by laltk*

**algebra1please look over THANK YOU**

The solutions to a quadratic equation are -1 and 7. What is the equation of its axis of symmetry? I GOT 3 is that right
*July 3, 2013 by lisa*

**Chemistry**

What is the pH of a 1.0E-8 M solution of HCl? Please note that you cannot simply add the contribution of H+ ions from the autoproteolysis of water and the contribution from the dissociation of HCl. You will need to use the quadratic equation to solve this problem and report ...
*September 3, 2010 by Joel*

**quadratic equation**

what's the positive root of the following equation x(square)=7x+8
*February 8, 2012 by tanya*

**quadriatic equation**

solve and check each of the following quadratic equation (1)x^+x-6=0 (2)x^+8x+15=0 (3)x^+2x+1=0 (4)x^-3x-4=0 (5)x^-4x-32=0
*February 15, 2012 by tanya*

**algebra**

Hi Dear Jiskha team, I have Algebra homework and I will need some help. The homework is following: Suppose you are using a computer to draw a face on a coordinate plane. The eyes are at (–3, 3) and (3, 3). The tip of the nose is at the origin. To make a smiling mouth, you are ...
*February 22, 2012 by Lily*

**College Algebra**

Solve the following equation in the complex number system x^4+x^3+4x^2+10x-60=0 College Algebra - Reiny, Monday, January 2, 2012 at 11:49pm hint x = 2 and x = -3 are roots so either do long division by x-2 and x+3 to get a quadratic or do it by synthetic division. Solve that ...
*January 3, 2012 by Jennifer*

**math**

Can someone explain how to label the vertex of this equation. f(x)= -(1/2)x^2. i know how to do these question but when it actually has the other components to the quadratic equation.
*April 6, 2010 by jen*

**Intermediate Algebra**

If the discriminant of a quadratic equation has the given value, determine the number and type of solutions of the equation. A.48 B.0
*April 21, 2012 by Ralph*

**Math(Please answer, thank you)**

(4.44e-2 - x) (8.06e-2 - x) / (0.331 + 2x)^2 = 1.80e-2 I need to rearrange this equation so that I can get a,b, and c, for the quadratic equation but I am not sure how to do this. Thank you for the help.
*March 24, 2012 by Hannah*

**algebra**

write a quadratic equation having the given numbers as solutions. -6 and -4 Not sure how this is to be written into an equation. Please help. Thank you
*February 3, 2015 by slomo*

**MATH**

(2,14),(1,-1),(3,35) Find the quadratic function y=ax^2+bx+c 1) 4a+2b+c=14 2) a+b+c=-1 3) 9a+3b+c= 35 equation 1&2 = 3a + b = 13 equation 1&3 = -5a +5b = -21
*May 12, 2009 by Sarah*

**Equation**

Solve the quadratic equation. 12x2 + 23x + 10 = 0 A.5/4,2/3 B. 5/12, 1/5 C. 5/4, 2/3 D. 5/4, 2/3
*June 28, 2010 by Lisa D*

**Algebra**

Use the quadratic equation to solve the equation: 4k(k+13)=13
*April 26, 2012 by Jay*

**Algebra**

1)Solve by factoring:5x^2=4-19x answer=-4,1/5 2)Which quadratic equation has roots 7 and -2/3? answer=A A.2x^2-11x-21=0 B.3x^2-19x-14=0 C.3x^2+23x+14=0 D.2x^2+11x-21=0 3)To solve 4x^2-28x+49=25 by using the square root property,you would first rewrite the equation as answer=(...
*August 12, 2007 by Marissa*

**algebra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Solution:2
*April 8, 2012 by Terry*

**algebra**

Can you use algebra to find a quadratic equation if your know the coordinates of just ONE point on its graph? Can you use algebra to find a quadratic equation if your know the coordinates of just TWO points on its graph? If so, what information is needed?
*October 6, 2011 by Sejul*

**quadratic functions**

The graph of a quadratic function can have 0, 1 or 2 x-intercepts. How can you predict the number of x-intercepts without drawing the graph or (completely) solving the related equation? Suppose that the graph of f(x) = ax^2+bx+c has x-intercepts (m,0) and (n,0). What are the x...
*June 6, 2015 by anonymous*

**Math**

(2,14),(1,-1),(3,35) Find the quadratic function y=ax^2+bx+c 1) 4a+2b+c=14 2) a+b+c=-1 3) 9a+3b+c= 35 equation 1&2 = 3a + b = 13 equation 1&3 = -5a +5b = -21 i know you take those two equations now 3a + b = 13 -5a - 5b = -21 multiply the top by 5 and the bottom equation by 3 ...
*May 12, 2009 by Sarah*

**algebra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0 -sqrt3, 3sqrt3
*March 28, 2012 by Terry*

**AlgebraB-2**

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = 0.04x+ 8.3x + 4.3, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ...
*March 26, 2013 by Jennifer W.*

**algebra**

Write a quadratic equation in the variable x, having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. The soluation is 8 and is the only solution.
*November 9, 2011 by Jones*

**Quadratic Functions**

Please explain to me how to do the following problems, I dont understand them. Thanks! Find the x-intercepts (if any) for the graph of the quadratic function. 1.f(x) = (x + 2)2 - 4 Find the y-intercept for the graph of the quadratic function. 5.y + 9 = (x + 3)2 Find the domain...
*October 13, 2007 by Carmen*

**math**

2.Define the shape of the rectangular area by establishing a relationship between the length and width of the rectangle. For example, L = 2W + 5, or W = 3L – 4. Be sure to include the appropriate units (inches, feet, yards, miles, or meters). 3.Using the fact that A = LW, ...
*October 11, 2011 by Anonymous*

**College algebra**

Given a quadratic equation in the form y = ax2 +bx +c , and four choices of graphs representing that equation, how can you tell which choices could be eliminated right away by looking at the equation and looking at the graphs and doing some minimal calculations and not ...
*June 6, 2011 by Belle*

**add maths**

Given that the quadratic equation is (2m+3)x^2+(4m-2)x-(m+1)=0.Find the value of m,if •one of the root of the equation is negative •one of the root of the equation is reciprocal of the other
*February 2, 2014 by mandy*

**questions**

1.) Why are there usually two solutions in quadratic equations? 2.) Under what situation would one or more solutions of a rational equation be unacceptable? If putting the found "solution" cannot be put back into the original equation without violating fundamental math rules...
*August 8, 2005 by leleirvin*

**MATH**

Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.
*September 15, 2009 by Anonymous*

**math**

Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.
*July 7, 2011 by candy*

**Quadratic equation...**

Hi Can anyone help me solve the quadratic equation for the following:- The motion of a two stage rocket is stated by it height y in metres above the ground since t seconds since launch. Flies vertically Ist stage burns for 5 seconds and cuts out. 2nd stage rocket is under ...
*December 1, 2007 by Leo*

**Math**

Solve the following quadratic equation(as exact values) using the quadratic formula. x^2-10x-15=0 I got 5+-2sqrt10/2. ^ Sorry hard to write it out. But basically there is a 5 there, the negative sign is supposed to be under the positive sign, then there is a two outside of the...
*December 5, 2011 by -Untamed-*

**Math quadratic function **

Jose bautista hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the Horizontal distance the ball has travelled away from jose, and h(x) is the height Vertical distance of the ball at that ...
*July 23, 2015 by Sandy*

**Math**

One student studied for 8 years in college and her tuition bills are recorded. Years. One semester tuition 1. 4680 2. 4960 3. 5510 4. 6060 5. 6845 6. 7600 7. 8435 8. 9250 Construct the scatter plot for the data with the scales.choose 3 points,find a quadratic equation in ...
*December 15, 2012 by Praphul*

**math,algebra,help**

Is this right: Solve: x^2+16x+60=0 this is what i did: i used the quadratic formula and this is what i ended up with. x = -8 +- (sqrt(16))/(2) Which is -8 +-2 Or you could have factored the quadratic (x+10)(x+6) Which is -8 +-2 Or you could have factored the quadratic (x+10)(x+6)
*April 14, 2007 by jasmine20*

**Math 3**

Solve by factoring: One of the solutions to the quadratic equation x^2 - 13x + 30 is 3. What is the other solution? Is it:(x+3) If 3 is a solution, then the quadratic contains a factor (x-3). The other factor is thus (x-10), and it follows that the other root is x = 10. thanks...
*January 30, 2007 by Margie*

**pre calc**

Solve: (x+5/x)+(6/x-4)=(-7/x^2-4x) I multiplied the entire function by x and x-4 and after doing that I got down to the quadratic equation x^2+7x-13=0 I did the quadratic and got x=1.525 and -8.525 I feel like I made a mistake because when I plug in both of those answers for x...
*October 24, 2009 by Muffy*

**Pre Calc still confused**

Solve: (x+5/x)+(6/x-4)=(-7/x^2-4x) I multiplied the entire function by x and x-4 and after doing that I got down to the quadratic equation x^2+7x-13=0 I did the quadratic and got x=1.525 and -8.525 I feel like I made a mistake because when I plug in both of those answers for x...
*October 24, 2009 by Muffy*

**cal**

find the equation of a quadratic function whose graph is tangent at x=1 to the line whose slope8, tangent at x=-2 to solve the line with slope-4 and tangent to the line y=-8 find the equation of the tangent lines at x=1 and x=-2 graph the quadratic function obtained and the 3 ...
*February 28, 2011 by erika*

**algabra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard from, as^2+bx+c=0 the solutions are (-3,1)
*February 21, 2011 by Mary*

**Math**

Can someone please explain how to solve 3x^2+7x-15=0 by using the quadratic equation? I know that the equation is: ax^2+bx+c=0 but I get confused about how to set the problem up and solve. Thanks.
*September 26, 2009 by B.B.*

**trigonometry**

Complete the square to Solve Quadratic Equation: Solve the equation. Express the answer in simplest radical form. -x^2-7x=-11 Please Help!!!! Thanks.
*November 12, 2009 by Sarah*

**trigonometry**

Complete the square to Solve Quadratic Equation: Solve the equation. Express the answer in simplest radical form. -x^2-7x=-11 Please Help!!!! Thanks.
*November 12, 2009 by Sarah*

**Math**

Find the discriminant of the quadratic equation and give the number and type of solutions of the equation. s^2√5 + s + √5 = 0 I'm confused because of the radical...
*November 18, 2011 by Linda*

**quadratic equation**

(x + 6)2 = 49
*April 14, 2011 by Anonymous*

**Math**

How can I find the point of intersection of the graphs x^2=y=4 and 2x-y=1 by hand? I can do the problem using a calculator, but I don't know how to do it by hand. I tried using substitution, but I ending up getting x^2+2x-5=0. It would not factor evenly. Should I use the ...
*June 28, 2007 by Corin*

**Algebra-Please help-I'm confused**

This deals with quadratic functions-If I have a graph with h = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you only take the opposite...
*September 21, 2010 by Tom*

**8th Grade Algebra**

You know how to solve quadratic equations using algebra, graphs and the quadratic formula. Sometimes one method of solving is more convenient than another method. Describe how you would solve each equation. Give reasons for you answers. A) 16x^2 = 1600 B) x^2 - 350 = 0 C) x^2...
*March 30, 2009 by Joy*

**math**

Jenny wanted to solve the quadratic equation x2 - 11x +18 = 0 by factoring. Which of the following equations would lead her to solve the given equation?
*August 30, 2014 by cam*

**trig**

how do you start this equation i've been tryng it for 20min. sec^6x(secxtanx)-sec^4x(secxtanx)=sec^5xtan^3x ec^6x(secxtanx)-sec^4x(secxtanx)=sec^5xtan^3x Factor out a sec^5 tan and divide thru. Left is sec^2 x = Tan^2 x Then this should reduce to sin^2 x = cos^4 x take the ...
*November 6, 2006 by berhana*

**Algebra**

This deals with quadratic functions-If I have a graph with he = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you only take the ...
*September 21, 2010 by Tom*

**Algebra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2+bx +c = 0 The solution is 6 only solution.
*May 5, 2009 by aaron*

**algebra**

write a quadratic equation in the variable x having the given numbers as the solutions. type the equation in standard form ax^2+bx+c=0 solution 6, only solution
*July 11, 2010 by sam*

**algebra**

write a quadratic equation in the variable x having given the numbers as sollutions type the equation in standard form ax^2+bx+c=0. solution 4 only solution
*February 8, 2011 by ella*

**algebra**

Can someone please help me with this one? Solve (5x+4)^1/2-3x=0 Just so you know, it is to the 1/2 power. Add 3x to both sides of the equation, then square both sides. That should enable you to gather terms and factor. Yeah, that's the part I understood. Could you help me with...
*March 10, 2007 by Lydia*

**College Algebra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2 +bx+c=0 The Solution is 7, only solution!
*August 12, 2010 by Alejandro*

**math please help**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2 +bx+c=0 The Solution is 10, only solution!
*August 29, 2010 by Katelynn Renee*

**Algebra**

I need help doing this problem, should I not get the same answer with each technique? Please help. What three techniques can be used to solve a quadratic equation? Demonstrate these techniques on the equation: 2x² + 3x + 1 = 0
*June 17, 2012 by Vilma*

**Math-Quartic Equation**

Reduce this equation using the quadratic formula, factoring, or other algebraic method to determine the other zeros of the function. F(x)= 4x^4 - x^3 - 11x^2 -2x +6
*October 28, 2012 by Ash*

**Algebra II**

Write a quadratic equation with -3/4 and 4 as its roots. Write the equation in form ax^2+bx+c=0, where a,b,and c are integers. (x-p)(x-q)=0 (x--3/4)(x-4)=0 (x+3/4)(x-4)=0 x^2-3x+3=0(answer)
*March 1, 2008 by Jon*

**Quadratic Functions**

I need help solving this equation: y=-2x^+3 And you do need to graph this equation so can someone please help me?
*April 7, 2008 by Megan*

**algebra**

Write the quadratic equation in factored form. Be sure to write the entire equation. x^2 - 5x - 24 = 0
*January 18, 2010 by yelena*

**math**

Write the quadratic equation in factored form. Be sure to write the entire equation. x^2 - 5x - 24 = 0
*January 26, 2010 by Chelsea*

**algebra**

Given a quadratic equation in the form y = ax2 +bx +c , and four choices of graphs representing that equation, how can you tell which choices could be eliminated right away by looking at the equation and looking at the graphs and doing some minimal calculations and not ...
*March 4, 2011 by mimi*

**Quadratic Equation**

Solve s2 + 5s + 7 = 0
*November 20, 2008 by Latoya*

**Math**

Is this equation quadratic? x^2+6= -8x Thanks.
*September 20, 2009 by B.B.*

**Algebra**

x = 2 or x = -4 What is the Quadratic equation?
*May 25, 2011 by Julie Ty in advance*

**maths**

what is the quadratic equation?
*March 2, 2012 by 4611star*

**math**

How do I set up the quadratic equation for this problem? 4.0= (2x)^2 / (1.0-x)(1.0-x) I know how to use the formula, but I have a hard time setting those equation to zero. Please explain step by step. Thank you
*May 14, 2013 by Amalia*

**Solving for x**

((2X-14Cos45)/(49+X^2-14XCos45))+0.3536 = 0 Solve to find the value of X Change cos 45 to sqrt 2 and rewrite the equation in the form a x^2 + bx + c = 0 Start out by rewriting it as 2x - 9.8995 = (-0.3536)(49 + x^2 - 9.8995 x) Conimue until you get the form a x^2 + bx + c = 0...
*June 15, 2005 by Sarah*

**Math using quadratic equation**

The freight train runs 12miles per hour than a passenger train. It runs 65miles in the same time that the passenger train runs 165miles find the rate of each train. I dont really know the formula using quadratic im sorry
*September 15, 2014 by Jenn*

**Algebra II**

I am expected to use the quadratic equation for the following: x2 + 3x – 4 = (x + 4)(x – 1) = 0. Once this is plugged into the value of x (the long equation, which I am unable to copy from the internet, but it goes -3 plus or minus the square root of...) I got -8/2, but I am ...
*November 12, 2008 by Rachelle*

**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*

**Quadratic Equations**

Can anybody tell me step wise step how to solve this quadratic equation? x^3-3x^2+4=0 Please tell me step wise step as i haven't solved such type of equations before. Thank You
*April 14, 2011 by Akash*

**math**

solve a quadratic equation x2+5x-14=0
*October 14, 2007 by Houston*

**algebra**

solve the quadratic equation: 3x(3x+4)=-4
*August 21, 2008 by nicky*

**Algebra**

Solve the quadratic equation. x^2 – x = 56
*November 5, 2009 by JR*

**math**

solve the quadratic equation x^2+5x-24=0. Thank you
*December 27, 2009 by Kay Kay*

**algebra**

How do you solve the quadratic equation 7x^2-5=0
*April 23, 2010 by Dani*

**Algebra 1**

How do I solve a quadratic equation?
*June 28, 2010 by Ashley*

**Algebra**

-7 and -4 the quadratic equation is? Thank you in advance :)
*May 24, 2011 by Julie*

**Math**

how do you prove the quadratic equation?
*July 13, 2012 by Randy*