Wednesday

September 17, 2014

September 17, 2014

Number of results: 110,450

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...
*March 21, 2013 by Jossie*

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...
*March 21, 2013 by Jossie*

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...
*March 21, 2013 by Jossie*

**mathematics**

The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...
*March 21, 2013 by Jossie*

**math**

can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation of the tangent at (1,4...
*December 28, 2011 by steev*

**maths**

1) Circle centre (7,-2) passes through (-2,10). Calculate radius and find equation of circle. 2) AB is diameter of circle A(9,5) B(-1,-7). Find equation of circle mid point. I know i have to use the eqn (x1+x2)/2 and (y1+y2)/2 3) Find the equation of circle with centre (-8,5...
*February 24, 2008 by Anonymous*

**steev**

can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation of the tangent at (1,4...
*December 28, 2011 by math *

**Math**

Hi guys, In the question "It is given that P (0, 3), Q(7, 5), R(9, -2) and S are vertices of a square. A circle A passes through the points P, Q, R and S. Find the equation of this circle. Hence or otherwise find the equation of circle B which is the image of A under the ...
*October 17, 2008 by Joshua*

**math**

-a circle with center at the point O(0,0) also has the point P(-2,3) on it. The equation of this circle is? and a second question: -A circle has a center of square root 5. The equation of this circle is? Please help me.
*October 9, 2008 by Garrick*

**math**

Write an equation of a circle with the center (-5,-4) and radius 6. The general equation for a circle is (x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle and (a,b) are the (x,y) coordinates of the center. Make the appropriate substitutions and you will have the ...
*May 7, 2007 by James*

**NEED MAJOR HELP! *QUADRATIC EQUATIONS***

Write the equation for the circle with center at (- 8, - 6) and radius of 10. (x+8)² + (y + 6)² = 10 (x+8)² + (y + 6)² = 100 (x-8)² + (y - 6)² = 100 Find the standard equation for the circle with center on the positive x-axis and passing through the origin with radius of 2. x...
*March 20, 2012 by Adrianna*

**Math (Pre Cal)**

Hi, I am studying for a precalculus quiz and I do not understand this hw problem: "The tangent line to a circle may be defined as the point that intersects a circle in a single point... If the equation of the circle is x^2+y^2=r^2 and the equation of the tangent line is y=mx+b...
*August 28, 2010 by Dealie*

**Math**

I need to write the standard equation for the circle that passes through the points: (-5,0) (0,4) (2,4) I have to use the general equation for a circle: x^2+y^2+dx+ey+f=0
*June 6, 2014 by Anonymous*

**calc**

a circle is tangent to the y-axis at y=3 and has one x-intercept at x=1 1. determine the other x-intercept 2. find an equation for the circle so i know two points on the circle are (0,3) and (1,0) and the equation for a circle is (x-a)^2 + (y-b)^2 = r^2 but i don't know how to...
*September 1, 2007 by sammy*

**Math**

This question makes reference to an orthonormal basis (i,j), and an origin O. 1. Consider the triangle ABC, with vertices A(0,-2), B(9,1), C(-1,11). Find: a) a cartesian equation of the altitude from C; b) a cartesian equation of the circle which has BC as a diameter; c) a ...
*February 27, 2008 by Anonymous*

**math**

a circle is tangent to the y-axis at y=3 and has one x-intercept at x=1 a) what's the other x-intercept b) what's the equation i have no clue how to solve this! You know that the center of the circle is somewhere in the line y = 3, denote the x-coordinate by rx. Then the ...
*August 4, 2007 by Anonymous*

**Math**

Answer check please: Consider the circle (x-3)^2 + (y+1)^2 = 169. The point (15,4) is on the circle. Find an equation for the line that is tangent to the circle at this point. I got y= 5/12x-9/4.
*August 26, 2012 by KC*

**8th grade math**

circle A has a raduis that is twice the length og the raduis of circle B. Which is an accurate statement about the relationship of these areas of circle A and B and y? a.the area of circle A is 4 times the area of circle B b. the area of circle A is twice the area of circle B...
*December 16, 2010 by Court*

**Alg2**

The tangent to a circle may be defined as the line that intersects the circle in a single point, called the point of tangency. If the equation of the circle is x^2 + y^2 = r^2 and the equation of the tangent line is y = mx + b, show r^2(1 + m^2) = b^2 Hint: The quadratic ...
*October 22, 2009 by Allen*

**Math - Equation of the circle**

Find an equation of the circle whose endpoints of a diameter are (−3,6) and (5,−14). I tried to figure it out, but I'm not sure if my answer is correct. I got.. (x-2)^2 + (y + 4)^2 = 116 Any help would be great. Thank you!
*September 9, 2014 by Layna*

**Geometry**

Within an orthonormal system consider points A(1,4) B(5,1) C(4,8) (a)Calculate the angle ABC (b)Show that 3x+4y-19=0 is an equation for line L which passes through A and B (c)Find a vector equation for line L (d)(i)give an equation for the circle with the line segment AB as ...
*May 4, 2008 by Anonymous*

**Math**

The points (4, 5) and ( 4, 1) are endpoints of a diameter of a circle. (a) Find the center of the circle. (b) Find the length of the radius of the circle. (Note that this is a distance.) Give the exact answer. Show work. (c) State the equation of the circle (in standard form...
*June 24, 2009 by Kate*

**geometry**

The equation of a circle is(x-3)squared plus (y+2)squared.The point (8,-2)is on the circle.What is the equation of the line that is tangent to the circle at (8,-2)? y=8 x=8 x=3 y=3
*January 18, 2012 by Dana*

**Algebra 2**

Consider a circle centered at (2,4). What are the coordinates of the center of the translated circle if we replace x with x-3 and y with y+5 in the equation of the circle?
*January 15, 2012 by Peter*

**equation for circle**

find the equation of a circle. the endpoints of the diameter of a circle are (3,-2) and (7,-6).
*February 5, 2012 by Declan*

**Math**

The point (-4.3) lies on a circle whose center is at (2,1). Find an equation of this circle.
*February 5, 2011 by Adam*

**geometry**

Circle O is defined by the equation x2 + (y - 2)2 = 25. Plot the center of Circle O and type in the coordinates of one point with integral values that lies on Circle O.
*August 5, 2012 by sara*

**math**

circle has a center at (-8,-4) and circumference of 32.determine equation of the circle
*March 29, 2011 by Anonymous*

**Math**

If the coordinates of the center of a circle are (-3,1) and the radius is 4, what is an equation of the circle
*September 7, 2013 by Kiki*

**College Algebra**

using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3 points each create an ...
*December 15, 2011 by Kevin*

**College Algebra**

using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3 points each create an ...
*December 15, 2011 by Kevin*

**Math**

Write the standard for of the equation of the circle that passes through the points at (0,8),(8,0),and (16,8). Then identify the center and radius of the circle.
*July 2, 2009 by Sally*

**Math**

write the equation of the circle in standard form. find the center, radius, intercepts, and graph the circle. x^2+y^2-6x-8y+25=36
*May 27, 2012 by Rachel*

**Math**

Find the equation for the following circle: The circle that passes through the origin and has intercepts equal to 1 and 2 on the x- and y-axes, respectively.
*August 8, 2008 by fishbowl*

**Math**

The endpoints of a diameter of a circle are (3, 4) and (7, 2). What is an equation of the circle?
*February 16, 2014 by Kiki*

**Trigonometry**

1) Find the coordinates of the point (-1,3) after the transformation T (to the -3,2 power) 2) What are the coordinates of point (-3,4) under D (to the 3rd power)? 3) Which of the following transformations could map the point (1,2) onto the point (3,6)? a)T (to the 2,3 power) b...
*February 24, 2010 by Tyler*

**Algebra II**

In this set of eight problems, we have to match each equation with the correct description of its graph. However, these are test corrections I'm doing and I do not have the previous multiple choice answers so I can deduct from it, but can someone help me? The equation is xy = ...
*February 4, 2009 by Emily*

**math**

A circle has an area of 25 pi cm^2.If a circle is drawn within that circle with a diameter equal to the radius of the first circle, what is the area of the second circle? a. 2 1/2 pi cm^2 b. 4 1/4 pi cm^2 c. 5 1/4 pi cm^2 d. 6 1/4 pi cm^2 e. 7 1/2 pi cm^2 please answer and ...
*January 5, 2014 by Thomas*

**Math**

A circle has a radius that increases at a rate of 10cm/s. Find the equation of the outermost circle 6 seconds after it starts to expand. Using x2 +y2=r2
*March 30, 2013 by Amjs*

**Math**

A circle has a radius that increases at a rate of 10cm/s. Find the equation of the outermost circle 6 seconds after it starts to expand. Using x2 +y2=r2
*March 30, 2013 by Amjs*

**Pre-Calc**

Can someone please be kind and show me the steps on this? Thanks Find the equation of the circle centered at the origin in the uv-plane that has twice the circumference of the circle whose equation equals (u-5)^2 + y^2 =9
*December 7, 2010 by Ann*

**math (pre clac)**

so its this picture of a rectangle inscribed in a circle. the circle has a radius of 2. the vertexes of the circle are present in every quadrant, but you cant tell exactly whgat point they represent. point Q (x,y) is the vertex of the rectangle in Quadrant I and is on the ...
*April 25, 2008 by Alexis*

**math**

HELP!! the area A of the circle in the figure can be represented by A(r)=pi,r^2 where r is the radius what are the resonable domain and range for each function? explain the problme before this made me make a equation of B(r)=5^2-pi,r^2 im not sure if there asking this or A(r)=...
*November 3, 2010 by paul*

**Math**

Circle O is centered at the origin and has a radius of 5. Circle O' is the image of circle O after a translation of T1,2. What is the center of circle O'? What is the radius of circle O'?
*March 3, 2010 by Collin*

**summer math hw **

one circle has a diameter of 10 inches. a second circle has a diameter that is twice the diameter of the first circle What is the ratio of the area of the smaller circle to the larger circle
*August 31, 2014 by lesleyy *

**Equations of a Circle**

Write the standard for of the equation of the circle that passes through the points at (0,8),(8,0),and (16,8). Then identify the center and radius of the circle. I have r=8, center=(8,8). What now?
*April 21, 2012 by Some1 Help Me Plz*

**GEOMETRY**

The diameter of a circle has endpoints P(10, 2) and Q(4, 6). a.Find the center of the circle. b.Find the radius. If your answer is not an integer, express it in radical form. c.Write an equation for the circle.
*May 30, 2012 by HELP PLEASE!*

**maths**

Given that the equation of the circle is x^2 + y^2 +2x -8y+5 =0 (i)Find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle
*February 27, 2012 by mazoe*

**maths**

Given that the equation of the circle is x^2+y^2+2x-8y+5=0 (i)find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle
*March 14, 2012 by tembo*

**maths-urgently needed**

find the equation of circle if the line 2x - y +1 = 0 touches the circle at the point (2,5) and the center of the circle lies on the line x+y -9 =0
*February 14, 2013 by Anonymous*

**Gradient of circle?**

A circle has the equation x^2+y^2-4x+6y-12=0 and i have already found that the centre has a coordinate of (2,-3), and a radius of 5 units. But i need to find points on the circle that has the gradient of -4/3 when a tangent is drawn on the point. How do i do that???
*September 26, 2009 by Marrion*

**Geometry**

The equation of a circle is (x−4)^2+ (y+2)^2=16. B) Find the radius of the circle with the given equation. Can somone give me step by step explanations? Thank you in advance!
*May 25, 2014 by Jazy*

**geometry**

This one is confusing me. please help The diameter of a circle has endpoints P(10, 2) and Q(4, 6).Find the center of the circle.Find the radius. If your answer is not an integer, express it in radical form. Write an equation for the circle. Thanks
*January 12, 2012 by ryan*

**Math**

how an I tell if this is a circle or an ellipse? also, how am I supposed to solve it? -x^2+2y^2+8x+3=0 I answered a similar question for Jordan last night at 11:20 divide your equation by -1 to make it start with a positive x^2 term. At this point you should realize that it is...
*April 4, 2007 by Darrin*

**math**

A circle is tangent to the y-axis at y=3 and has one intercept at x=1. a) Determine the other x-intercept. b) Find the equation of the circle. Thanks for helping!
*August 3, 2008 by alk*

**Math (geometry)**

Line l is tangent to circle O at point P(3,4) where the center is located at (0,0). a. Find the radius of the circle. (I got 4) b. Give an equation of the circle. (I got x^2+y^2=16) c. Find the slope of line l. d. Give an equation of line l...
*April 30, 2008 by Emily*

**Math**

A circle is tangent to the y-axis at y=3 and has one x-intercept at x=1, find the other x-intercept and the equation of the circle. ...And if it's not any trouble, could you please explain how to do get there alongside showing me what to do? Thanks (:
*February 8, 2010 by Leslie*

**Math**

I have a series of questions that I did. They lead up to the last question I can't solve. Could you check my math and help me with the last question? Thanks! a) Let a be the point (2,3). Compute the distance from Origin 0 to A answer: a^2 + b^2 = c^2 3^2 + 2^2 = c^2 c=sqrt(13...
*October 14, 2010 by Shane*

**algebra**

1)Write an equation for the parabola with focus (1,3)and vertex(0,3) answer= x= 1/4(y-3)^2 2)Write an equation for a circle if the endpoints of a diameter are at (1,1)and(1,-9) answer= (x-1)^2+(y+4)^2=25 3)Which is the equation of a circle with center (0,1)and radius 2 units? ...
*August 21, 2007 by Marissa*

**math - geometry**

Austin wants to sketch the graph of a circle represented by the given equation. (x - 4)2 + (y + 7)2 = 64 Using complete sentences, describe the steps used to sketch the circle on a coordinate grid
*August 19, 2013 by kris*

**math**

The circumference of a circle varies directly from its diameter. If the circumference of the circle having a diameter of 7cm is 7 cm, what is the circumferences of the circle whose diameter is 10cm? 18cm? 20cm? a. Write a mathematical statement that relate two quantities ...
*August 21, 2014 by =)*

**math-equation of circle**

Write the standard form of the equation of the circle that passes through the points at (4,5) (-2, 3), and (-4,-3). a. (x-5)^2+(y+4)^2=49 b. (x-3)^2+(y+2)^2=50 c. (x+4)^2+(y-2)^2=36 d. (x-2)^2+(y+2)^2=25 I'm having trouble with solving for the variables...after I make the ...
*May 13, 2008 by Lisa*

**Pre-Calc (Circles)**

Describe the conditions necessary, where circle A has a larger radius than circle B, for the two circle to have no points of intersection, while circle B is entirely in the interior of circle A.
*November 17, 2009 by Anonymous*

**Check!!!**

okay so the question is: A unit circle center at the origin undergoes a series of transformations. The equation of the resulting graph is (x-3)^2+ (y+4)^2= 25 describe the transformation the unit circle underwnt Answer: The original circle was centered at the origin and had ...
*February 14, 2007 by math*

**math**

The equation of a circle with centre O(0,0) is x^2+y^2=40. The points A(-2,6) and B(-6,-2) are endpoints of chord AB. DE right bisects chord AB at F. a)Verify that the centre of the circle lies on the right bisector of chord AB. b)Find the distance from the centre of the ...
*October 9, 2008 by Cynthia*

**Math**

These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of the following ...
*October 6, 2010 by Hannah*

**math **

Rewrite the following equation in the center-radius form of the equation of a circle. x2 - 2x + y2 + 2y - 2 = 0
*March 21, 2014 by Elizabeth*

**math**

A circle with the equation (x + 4)2 + (y - 3)2 = 9 is reflected over the line y = -1. What is the equation of the image?
*January 22, 2012 by Callie*

**Math(Please check answers)**

These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of the following ...
*October 6, 2010 by Hannah*

**math **

I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and the edge of the circle ...
*May 4, 2013 by Ed*

**math**

I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and the edge of the circle ...
*May 5, 2013 by Hannah*

**Geometry**

The equation of a circle is x^2 + 6x + y^2 - 2y = 15. What are the center and radius of the circle? Please show work.
*May 3, 2011 by Anonymous*

**Algebra**

The point (-1,0) lies on a circle whose center is at (-6,5). Find an equation of this circle
*May 17, 2011 by Jennifer*

**maths**

the equation of the circle is x^2+y^2+2x-8y-1=0. Find the coordinates of the point where the circle crosses the x-axis
*March 30, 2012 by mumba*

**Math**

The standard form of a circle is Ax^2+Cy^2+Dx+Ey+F=0. Write the equation for the circle: Center (1,2), point on the circle (-2,-1). Okay, I've always put circles in the form (x-h)^2+(y-k)^2=0. I got this: r^2=(x-1)^2+(y-2)^2 then I substitute the point to find the radius: r^2...
*February 6, 2010 by Anonymous*

**geometry**

Given the equation of the circle (x 9)2 + y2 = 484 , where is the center of the circle located at?
*November 12, 2013 by jose*

**Math Trig**

At what two points on the unit circle is the x-coordinate equal to the y-coordinate? Hint:Use the equation for the unit circle (x^2+y^2=1) but this time, replace y with x.
*October 28, 2009 by John*

**Algebra**

Write the equation of the circle. Center at (4,2) and the circle passes through the point (-1,-1). Please help!
*September 23, 2009 by Bree*

**Advanced Math**

Write the standard form of the equation of a circle that passes through the points at (0,8) (8,0) and (16,8). Then identify the center and radius of the circle. (x-8)^2 + (y-8)^2 = 64 (x^2 / 64) + (y^2 / 64) = 64 center=(8,8) radius=8 I got it wrong don't know how
*April 16, 2009 by Anonymous*

**Calculus**

Points (1, 6) and (3, 2) are endpoints of the diameter of a circle. (a) What is the exact length of the diameter? (Simplify as much as possible) Answer: ________ (b) What is the center of the circle? Answer: ____________ (c) What is the equation of the circle? Answer: ...
*March 10, 2012 by Brian*

**Algebra**

If a circle of radius 5 is made to roll along the x-axis, what is the equation for the path of the center of the circle?
*August 11, 2009 by coried*

**Algebra**

The circumference,y, of a circle varies directly with the diameter,x, of the circle. Write an equation if y=44cm when x=14cm.
*May 17, 2010 by Austin*

**Pre-Calc**

True or False: Every equation of the form X^2+y^2+ax+by+c=c The radius of the circle x^2+y^2=9 is 3 The center of the circle (X+3)^2+(y-2)^2=13 is (3,-2)
*January 10, 2012 by nelly*

**Algebra ll**

Help please The center of a circle is at (-5 , 1) and it has a radius of 9. What is the equation of the circle? A.(x-5)^2+(y+1)^2= 81 B.(x-5)^2+(y+1)^2= 3 C.(x+5)^2+(y-1)^2= 81 D.(x+5)^2+(y-1)^2= 3
*June 6, 2014 by Me and I*

**Math. Help me please!**

The two circles have equations x^ + (y-3)^2 = 49 and x^2 + (y-17)^2 =49. find the equation of the larger circle. The diagram looks like two circles on top of the other then a large circle outside.
*April 14, 2011 by Bianca*

**Algebra**

Knowing the given conditions, write the equation of the circle. Center at (4,2) and the circle passes through (-1,-1). Please help!
*September 27, 2009 by Bree*

**Algebra**

2. Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x2+y2+8x+2y+8=0
*December 2, 2013 by Jeannette*

**math-10th grade( quadractics)**

the centre point of a circle is 5,3. the top most point of the circle is the vertex. the radius of the circle is 5 and one of the zeroes is 9. figure out the vertex. tehn figure out the equation and convert it in standard form? p.s-plz exaplain step to step process or detailed...
*March 30, 2009 by Redspider*

**Math**

identify the center and radius of the circle with the equation (x+5)^2+(y-2)^2=9 A. this equation represents a circle with center (5,-2) and a radius of 3 units B. This equation represents a circle with center (-5,2) and a radius of 3 units C. this equation represents a circle...
*May 21, 2014 by Kathryn*

**Math**

identify the center and radius of the circle with the equation (x+5)^2+(y-2)^2=9 A. this equation represents a circle with center (5,-2) and a radius of 3 units B. This equation represents a circle with center (-5,2) and a radius of 3 units C. this equation represents a circle...
*May 21, 2014 by Kathryn*

**College Algebra**

Write the equation of a circle in standard Find the center, radius intercepts and graph the circle. .........x^2+y^2-12x-4y+36=0
*August 24, 2012 by Mountain Scott*

**college algebra**

write the equation of the circle in standard form find the center radius, intercept and graph circle x^2 +y^2+8x+2y+8=0
*October 26, 2012 by zachary*

**Math**

Cindy has two fourths of a circle and three tenths of a circle. What does she need to make a whole circle?
*October 26, 2009 by Juanita*

**math**

The tangent from point T touches a circle at R.If the radius of the circle i 3cm and T is 5cm from the center of the circle.Calculate/TR/.
*September 17, 2011 by Raha *

**math**

The area of circle c is 81 pi . if the radius of the circle is doubled, what is the circumference of the new circle ? please answer and explain
*January 5, 2014 by Thomas*

**Maths**

A circle C passes through the point (-12,9) and is given by the equation (x-a)^2 + (y-b)^2 = r^2. If the equation of the tangent to the given circle at the point (-4,1) is given by x-y+5=0, find the values of a,b and r. The answers have to be a=-8, b=5 r=5.657
*March 17, 2008 by Claire*

**8th grade math**

The radius of circle M is 3 times the radius of circle P. If the area of circle P is abotu 27 sq. cm. the area of circle M is about what? (Use 3 as pie) i dont get it. is the scale ratio 3:1?
*January 5, 2009 by brianna*

**Math**

The center of a circle is A(-3,3) an B(1,6) is in the circle. Find the area of the circle in terms of pi. a^2 + b^2 = c^2 radius is 5 and 25pi
*January 23, 2012 by J.R.*

**algebra**

1)What is the distance between the museum and sailing club.I cant post the graph or anything but I have my numbers right its 53 but I used the distance formula so its either 53 units or the square root of 53 units. 2)Write the equation of the parabola y= 4x^2-8x+1 in standard ...
*August 20, 2007 by Marissa*

**algebra**

A few more question Id like for someone to check please. 1) what are the vertex, focus, and directrix of the parabola with the given equation? x^2-8x-28y-124=0 vertex (4,-5) focus (0,7) directrix y=-12 2) write an equation of a circle with given center and radius. center(-7,-6...
*February 22, 2013 by lee*

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