Questions on Algebra: Conic sections - ellipse, parabola, hyperbola answered by real tutors!

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 Algebra: Conic sections - ellipse, parabola, hyperbola Solvers Lessons Answers archive Quiz In Depth

 Question 139710: Please help me with this problem. I have asked for hrlp before but could not find the answer to it. Thank you for your help. This problem is from a homework sheet. Write the series in summation notation. Use the index i and let i begin at 1 in each summation. 3.) 9 + 14 + 19 + 24 + 29 Click here to see answer by stanbon(57967)

 Question 139709: Please help me with this problem. I have asked for hrlp before but could not find the answer to it. Thank you for your help. This problem is from a homework sheet. Write the series in summation notation. Use the index i and let i begin at 1 in each summation. 3.) 9 + 14 + 19 + 24 + 29 Click here to see answer by scott8148(6628)

 Question 139738: please help me with this problem. It is from a mathe work sheet. Thnak you. Find the center and the radius of the circle. 4.) x2 + 12x + 36 + (y-4)2 = 49 Click here to see answer by JSmall(7)

 Question 139744: What is the graph, vertex and intercepts of: y= x^2+3x-1 Click here to see answer by solver91311(17077)

 Question 139741: Please help with problem. It comes from a homework sheet. Thank you. Find the vertex of the parabola and determine whether the parabola opens upward, downward, to the left, or to the right. 15.) y = -(x+2)2 to the second power + 2 Click here to see answer by solver91311(17077)

 Question 139712: I am working on a math homework sheet. I am having trouble with some problems. Can someone please help me figure these out. Find the equation of the parabola by the given information. 13.) Vertex at the origin, focus at (0,3). Click here to see answer by scott8148(6628)

 Question 140415: How do I find the starndard form of an ellipse with the equation x^2+4y^2-6x-27=0? Click here to see answer by stanbon(57967)

 Question 140420: I have the parabola x=2y^2. i've worked the formula for "c" over several times and my calculations always seem wrong. Could you show me a step-by-step of this problem? Click here to see answer by stanbon(57967)

 Question 140845: Consider the following graph of y = f(x). NOTE: P is 1 on the x-axis a)If h(x) = f(x) + 2, what would the new coordinates of P be after the shift? Give answer in (x, y) form. b)If k(x) = f(-x), what would the new coordinates of P be after the reflection? Give answer in (x, y) form. Click here to see answer by stanbon(57967)

 Question 140954: Hello. Can I please get help with this problem? Give the focus, directix, and axis for the equation of the parabola y^2=-16x Thank you so much for your help! Click here to see answer by checkley77(12569)

 Question 141028: What is the vertex and focus of the parabola whose equation is ? Click here to see answer by Edwin McCravy(8999)

 Question 141095: I need to Identify the conic section, then place in standard form. The equation is: 4x^2+y^2+8x-4y-28=0 This is as far as i have been able to solve it. (4x^2+8x)+(y^2-4y)=28 [4(x+1)^2-1]+(y-2)^2-4=28 +4 +4 4(x+1)^2+(y-2)^2-1=32 +1 +1 4(x+1)^2/33+(y-4)^2/33=1 any help you can give would be wonderful. Thank you. Click here to see answer by rapaljer(4667)

 Question 141474: A conical shaped container is made from a circular piece of paper. It has a base radius of 9cm and a height of 12cm. What is the circumference of the original circle in centimatres? Click here to see answer by jojo14344(1512)

 Question 141449: y=2x^2+4X-6, find x&y intercepts, coordinates of vertex,graph equation Click here to see answer by nabla(475)

 Question 141450: I have a quiz tomorrow and I am having trouble solving the practice equation... Write 9x^2-108x+4y^2+8y+184=0 in standard form. Is it an ellipse, circle, parabola or hyperbola? Click here to see answer by nabla(475)

 Question 141477: What is the converse of the following statement? "If a diameter of a circle intersects a chord of the circle at right angles, then it bisects the chord." a) If a diameter bisects a chord of the circle, then it intersects the chord at right angles. b) If a diameter of a circle intersects a chord of the circle, then it does not intersect the chord at right angles. c) If a diameter of a circle does not bisect a chord of the circle, then it does not intersect the chord at right angles. d) All diameters of a circle bisect chords at right angles. Click here to see answer by stanbon(57967)

 Question 141478: Determine the equation of the line passing through the centres of the circles and Click here to see answer by Edwin McCravy(8999)

 Question 141518: How do I square the square where needed... x^2+2x+y^2+4y=4 Click here to see answer by solver91311(17077)

 Question 141473: A conical shaped container is made from a circular piece of paper. It has a base radius of 9cm and a height of 12cm. What is the circumference of the original circle in centimatres? Click here to see answer by solver91311(17077)

 Question 141623: Which mapping rule transfroms the unit circle to a circle having centre(1,-5) and radius4 ? a)( x,y)--(1/4x-1,1/4y+5) b)(x,y)--(1/4x+1,1/4y-5) c)(x,y)--(4x-1,4y+5) d)(x,y)--(4x+1,4y-5) Click here to see answer by oscargut(900)

 Question 141988: Describe the procedure used to write the standard equation of the ellipse defined by Click here to see answer by jim_thompson5910(28715)

 Question 142052: Identify vertex, focus, directrix, axis of symmetry and latus rectum from the following parabola equation: Click here to see answer by Edwin McCravy(8999)

 Question 142452: graph, identify the conic section, and find the domain and range of 2x^2+y^2=36 Click here to see answer by stanbon(57967)

 Question 143097: the question is: solve this system. x-y=5 x2+y2=25 Click here to see answer by oscargut(900)

 Question 143181: write the equation of the information given. endpoints of a diameter are (6,9) and (20,7) Click here to see answer by rapaljer(4667)
 Question 143181: write the equation of the information given. endpoints of a diameter are (6,9) and (20,7) Click here to see answer by scott8148(6628)

 Question 143180: write the equation of the information given. endpoints of a diameter are (6,9) and (20,7) Click here to see answer by scott8148(6628)
 Question 143180: write the equation of the information given. endpoints of a diameter are (6,9) and (20,7) Click here to see answer by rapaljer(4667)

 Question 143179: write the equation of the information given. endpoints of a diameter are (6,9) and (20,7) Click here to see answer by scott8148(6628)

 Question 143184: Obtain an equation for an ellipse with major axis of lenghth 12 and foci at (-2, 5) and (-6, 5). um i've tried solving it and at best, i've gotten the start with: (x+4)^2 + (y-5)^2 ------- ------- 36 22 (?) and there is no multiple choice answer with 36y^2, for the y^2, the choices are...... 52y^2 8y^2 9y^2 please help me soon ! :) i need this ready by tomorrow afternoonish thank you. Click here to see answer by scott8148(6628)

 Question 143161: write an equation for the circle with the endpoints of the diameter at (-2,13) and (8,7) Click here to see answer by solver91311(17077)

 Question 143159: Write equation for a parabola with a focus at (0,5) and a vertex at (0,0) Click here to see answer by nabla(475)

 Question 143454: Find the points of intersection of the graphs: x^2/4 + y^2/9 =1 & y = -x-2 Click here to see answer by stanbon(57967)

 Question 143709: Identify the conic section and its lines of symmetry. Then find the domain and range Click here to see answer by rapaljer(4667)

 Question 143561: HOW DO YOU GRAPH FOCUS AT (2,3) AND DIRECTRIX X= -1? Click here to see answer by Edwin McCravy(8999)

 Question 144015: i dont know how to start this problem. it tells me to graph the conic section. i know how to graph but i dont know how to format the equation. the equation is (y+4)^2 = x-1 Click here to see answer by ankor@dixie-net.com(15746)

 Question 144037: hello i am in 10th grade right now and we are learing about conics there are few problems that i do not understand and i would really appreciate it if you could send me e-mail as soon as possible i have a quiz this week thank you so much!! i really appreciate it here's the problem ---------------------------------------------------------------------- focus at (-3,4); directrix the line y=2 given this information, how do you find: vertex (h,k) = a (distance between focus and vertex) = ---------------------------------------------------------------------- i know that the parabola is going to open up and the formula for the directrix line is y= k-a and y= 2 , so that means k-a=2, but i do not know the vertex and the value of a... thank you for your HELP! Click here to see answer by stanbon(57967)

 Question 144041: hello again i have another problem this time, i have a question on "elipse" and here is the problem ========================================================== 4x^2+9y^2-16x-18y=11 this is the expanded equation, so how do i find the STANDARD form of this equation?? and how do i find the coordinates of 4 VERTICES??? including major and minor axis??? ============================================================= please tell me all the steps and i would appreciate it very MUCH!!!!! thank you so much again i have a quiz and i go this problem wrong please tell me soon as possible and have a great day ! THANK YOU! Click here to see answer by stanbon(57967)

 Question 144056: hello im in high school righ now, learning about conics and i have a question on how to find an equaion of a circle if: ====================================== circle with center at (-5,1) and radius 6 also what it he line(s) of symmetry? ======================================== thank you so much and i will appreciate very much if you could respond soon as possible i have a quiz tomorrow thank you !!! Click here to see answer by jim_thompson5910(28715)

 Question 144052: hello i have another question sorry .. and thank your for your time i'll get straight to the point ======================================================== find the center, foci, and vertices of the following elipse [(x-3)^2]/4 + [(y+1)^2]/9 = 1 ================================================== thank you for your kindness and your time as well i appreciate it i'll be looking forward to your answer Click here to see answer by jim_thompson5910(28715)

 Question 144212: hi im a student who is struggling with conics therefore i'll appreciate it if you could help me i do not understand why this equation below is a "hyperbola" ... ? my teacher said that it was a hyperbola and i still don't get it ----------------------------------------- 9xy = 4 i found that the standard form was y= 4/9x but why is this an hyperbola? doesn't both x and y have to be squared?? and can you please tell me how to graph it?? i also learned that it has both horizontal and vertical asymptotes --------------------------------------------------------------- thank you so much for your help! i'll be waiting Click here to see answer by stanbon(57967)

 Question 144338: hello i have a question on the equation of an Ellipse i have the equation of x^2-6x+y^2-12y+41=0 and i found out that the standard form was [(x-3)^2]/4+[(y-6)^2]/4 = 1 and i can't figure out if its horizontal or vertical because the denominators are the same is this an ellipse?? thank you for your help i really appreciate it i have a test so please help me! Click here to see answer by scott8148(6628)

 Question 144378: Hi, again thanks for all the help it is great during finals week. Find the vertex and intercepts then graph the equation state if the concave is up or down. f(x)=3(x-2)^2-3. Thanks. Click here to see answer by nabla(475)

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