Tutors Answer Your Questions about Quadratic-relations-and-conic-sections (FREE)
Question 688050: How do I put the equation in standard form? The vertices and the center of the equation are also needed:
-16x^2-4y^2=48x-20y+57
I did try to solve it using completing the square but it didn't work out the correct way, because the numbers I came up with I was not able to factor them.
Click here to see answer by stanbon(75887)  |
Question 688211: How do I put the equation in standard form? The vertices and the center of the equation are also needed:
-16x^2 - 4y^2 = 48x - 20y + 57
I did try to solve it using completing the square but it didn't work out the correct way, because the numbers I came up with I was not able to factor them.
Click here to see answer by lwsshak3(11628) |
Question 688106: An arch is in the form of a semiellipse. It's 50 metres wide at the base and has a height of 20 metres. How wide is the arch at the height of 10 metres above the base? This is my question please help on the solution, i tried it so many times but i can't gate the clue yet. Help me .
Click here to see answer by lwsshak3(11628) |
Question 688908: A cannon fires a cannonball whose path is a parabola with vertex
at the highest point of the path. If the cannonball lands 1600 feet from the
cannon and the highest point reached is 3200 feet above the ground, find an
equation for the path of the cannonball.
Click here to see answer by josmiceli(19441)  |
Question 691391: Write an equation for the parabola with the vertex (1,3) that passes through (-2,-15).
I have tried to figure out how to do y=A(x-h)^2, but cannot figure out how to apply it to the problem.
Sorry if topic is wrong, I can't click on the right one.
Click here to see answer by nerdybill(7384)  |
Question 691499: Find the intersection points of the pair of ellipses. Sketch the graphs of each pair of equations on the same coordinate axes and label the points on the intersection. Show proper algebra.
{4x^2+y^2=4
{4x^2+9y^2=36
I have already graphed them using a graphing system called geogebra. I need to know how to show my work though ( I need the proper algebra)
Click here to see answer by Edwin McCravy(20056)  |
Question 691514: Find the vertex, focus and directrix and sketch the graph of the parabola from the equation (x+1)^2 + 8(y+2)=0.
First, I got the vertex (-1,-2), h=-1 k=-2. Next I tried to find teh focus but wanted to get "p" first. So 4p=8 p=2
Using the formula to get the focus (h,k+p) I get (-1,-2+2)-(1,0) but when I looked at my answer book it said that p=-2 and the focus is (-1,-4). What may I be doing wrong.
Click here to see answer by Edwin McCravy(20056) |
Question 692187: Hello, I wonder if someone can help me on this homework problem?
Find the vertices, foci, and eccentricity of the ellipse. Determine lengths of major and minor axes, and sketch the graph.
{{xˆ2+4yˆ2=1}}
Thank you.
Click here to see answer by lwsshak3(11628) |
Question 692383: PART 1: The graph of the equation y^2-x^2+2x=2 is:
PART 2: The graph of the equation y-x^2=2x
a. parabola
b. elipse
c. circle
d. hyperbola
e. none of these
Part 1 Solve:
y^2-x^2+2x=2
???????????
Part 2 Solve:
y-x^2=2x
y=x^2+2x
(parabola)
That's all I got, I don't know how I would solve part 1 to figure out what kind it is and I'm pretty sure part 2 is right. If anyone can solve part 1 it would help a lot
Click here to see answer by lwsshak3(11628) |
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