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Tutors Answer Your Questions about Quadratic-relations-and-conic-sections (FREE)
Question 200474: I have two equations that I cant seem to solve because I dont understand. I have been trying to solve for two days, yes I am very rusty with this it has ben over 10yrs since I had to do algebra. If you could please help it wold be greatly appreciated. Tahnk you. Nakia
x^2+y^2+10x+14y+73=0
also
36x^2+36y^2+48x-36y-11=0
the directions for this equation tells me to find the center and length of a radius of each circle
Click here to see answer by jim_thompson5910(13794)   |
Question 201030: not sure if in right area but can someone help me with this problem
An open box is to be constructed from a piece of cardboard that is 30in. by 30in. by cutting a square out of each corner and folding up the sides. What are the dimensions of the box that will yield the maximum volume?
so confused
thanks
Click here to see answer by solver91311(5072)  |
Question 201030: not sure if in right area but can someone help me with this problem
An open box is to be constructed from a piece of cardboard that is 30in. by 30in. by cutting a square out of each corner and folding up the sides. What are the dimensions of the box that will yield the maximum volume?
so confused
thanks
Click here to see answer by stanbon(26284) |
Question 201030: not sure if in right area but can someone help me with this problem
An open box is to be constructed from a piece of cardboard that is 30in. by 30in. by cutting a square out of each corner and folding up the sides. What are the dimensions of the box that will yield the maximum volume?
so confused
thanks
Click here to see answer by RAY100(1637) |
Question 202383: Can anyone help me with ANY of these problems? Please!
1) Solve the following system.
x^2 + y^2 = 25
2x + y = 10
The solution set {(___,___),(___,___)}
2) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). Using k for the constant of proportionality, express the relationship between V and l if V varies directly with l.
V = _______
3) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). If one of the boxes has a volume of 325 cubic inches and a length of 13 inches, what is the constant of proportionality for the group of boxes?
k = ________
4) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). If a box in the group has a length of 25 inches and k = 15, what is its volume?
_____ cubic inches
5) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). If a box in the group has a length of 30 inches, and the girth of 20 inches (perimeter of the side formed by the width and height), what is its height? Use k = 24. (Hint: Volume = length * width * height. Solve for length, and substitute into the equation for constant of proportionality.)
____ inches or ____ inches
Thanks for all your help,
~Sarah
Click here to see answer by stanbon(26284) |
Question 202383: Can anyone help me with ANY of these problems? Please!
1) Solve the following system.
x^2 + y^2 = 25
2x + y = 10
The solution set {(___,___),(___,___)}
2) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). Using k for the constant of proportionality, express the relationship between V and l if V varies directly with l.
V = _______
3) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). If one of the boxes has a volume of 325 cubic inches and a length of 13 inches, what is the constant of proportionality for the group of boxes?
k = ________
4) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). If a box in the group has a length of 25 inches and k = 15, what is its volume?
_____ cubic inches
5) Complete the following item based on the given information.
The volume of a box(V) varies directly with its length(l). If a box in the group has a length of 30 inches, and the girth of 20 inches (perimeter of the side formed by the width and height), what is its height? Use k = 24. (Hint: Volume = length * width * height. Solve for length, and substitute into the equation for constant of proportionality.)
____ inches or ____ inches
Thanks for all your help,
~Sarah
Click here to see answer by jsmallt9(594) |
Question 202415: Can anyone help me? The directions are:
Choose the correct conic section to fit each equation. Is it a Circle, Ellipse, Parabola, or Hyperbola?
1) x^2 + y^2 = 16
2) (x - 8)^2 + (y - 12)^2 = 25
3) (x^2/9) + (y^2/4) = 1
4) y = (1/8 x^2)
5) x = (1/16 y^2)
6) (x^2/16) - (y^2/4) = 1
7) x^2 - 4y^2 = 100
8) x^2/36 - y^2 = 1
Thanks in advance for all your help. :)
~Sarah~
Click here to see answer by solver91311(5072) |
Question 202555: hyperbola
find: center, foci, vertices, asymptotes
I can't figure out how to get rid of first 9
elipse
given: vertices(-2,4);(-2,-2) passing through (0,1)
find the equation
I get the answers but my signs are wrong or I get 1/16th instead of 16
plz help
Click here to see answer by Edwin McCravy(2922) |
Question 203347: A toy rocket is shot vertically upward from the ground. Its distance in feet from the ground in "t" seconds is given by h(t)=-16t^2+137t. At what time or times will the rocket be 119 feet from the ground?
Click here to see answer by jsmallt9(594) |
Question 204715: How do you find the answer to this? I understand where the 150 comes from, but not the -3/2.
A farmer has a total of 300 yards of fencing. He wants to enclose a recfield and then divide it into 2 plots with a piece of fencing inside the field parallel to one of the sides. Let x represent the length of the piece of fencing located inside the field. Express teh area of the field as a function of x.
There's a diagram with a rectangle and a line almost halfway through it vertically but a little bit closer to the left side, with x next to it. The answer is A=x(150-3/2x)
Click here to see answer by scott8148(3382)  |
Question 204715: How do you find the answer to this? I understand where the 150 comes from, but not the -3/2.
A farmer has a total of 300 yards of fencing. He wants to enclose a recfield and then divide it into 2 plots with a piece of fencing inside the field parallel to one of the sides. Let x represent the length of the piece of fencing located inside the field. Express teh area of the field as a function of x.
There's a diagram with a rectangle and a line almost halfway through it vertically but a little bit closer to the left side, with x next to it. The answer is A=x(150-3/2x)
Click here to see answer by alicealc(98) |
Question 205837: find the vertex, focus & directrix for the following functions:
(y-4)^2 = 20(x-4)
Vertex = ?
focus = ?
directrix x = ?
y^2 - 86 = 12x - 4^2
Vertex = ?
focus = ?
directrix x = ?
(x-9)^2 = 12(y-5)
Vertex = ?
focus = ?
directrix x = ?
x^2 + 40x = 4y - 16
Vertex = ?
focus = ?
directrix x = ?
Click here to see answer by stanbon(26284) |
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