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Bedmas |
2008-08-25 |
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From Robert:
I am having some difficulty with the following equation:
200 * 5 / 2 - 450 + 25
Answered by Victoria West. |
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The square root of a fraction |
2008-08-24 |
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From Lauren:
How do you solve square roots of fractions? Does the format change if it is either a proper or an improper fraction?
Ex. the square root of 1/4 or the square roots of 80/25
Answered by Penny Nom. |
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A linear system |
2008-08-23 |
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From dipesh:
consider the system of equations
x-6y+2z=5
2x-9y-z=14
4x+12y-3z=19
by reducing the augm matrix to row echelon form, find
the solution to the equation.
leaving the first two equations the third is changed to -3x+6y+14z=-31
show the equations have infinitely many solutions and give a general
formula for them
Answered by Penny Nom. |
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Radii and Chords Create a Non-Right Triangle |
2008-08-22 |
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From Beary:
AOC is a diameter of circle O. Line AB is 12, and lines OA and OC (the radii) are 10. Find the length of line BO and chord BC.
Answered by Janice Cotcher. |
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Simplifying Algebraic Expressions |
2008-08-22 |
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From Jacky:
x^2-y^2+4x+4y
Answered by Penny Nom. |
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Two tangent circles |
2008-08-22 |
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From Michele:
A circle of radius 2 is externally tangent to a circle of radius 8,
How do you find the length of their common tangent.
Answered by Penny Nom. |
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Function or Not? |
2008-08-22 |
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From Katie:
Determine whether y is a function of x:
[(x^2)y]-(x^2)+(4y)=0
....thx
Answered by Janice Cotcher. |
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Converting centimetres to metres |
2008-08-21 |
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From walter:
how do you convert the smaller unit to a decimal of the larger unit and then solve
17 m - 130 cm
Answered by Penny Nom. |
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Trough Filling with Water |
2008-08-21 |
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From lanny:
a triangular trough is 10 feet long, 6 feet across the top, and 3 feet deep. if water flows at the rate of 12 cubic inches per minute, find how fast the surface is rising when the water is 6 inches deep.
Answered by Janice Cotcher. |
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Irregular polygon and Circle that Intersects All Sides |
2008-08-20 |
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From Xetro:
Hi,
Suppose you have an irregular polygon(convex or concave) with n > 3 sides.
The question is - Find some circle that will cut(in limiting case - touch) all the sides of that polygon.
It doesnt matter how many times it cuts the side(1 or 2), it just have to cut or touch it.
How to find such a circle? or how to decide if such circle even exists?
What if those segments do not form a polygon but are some arbitrary segments ?
Really want to know how to do it................
Thanks a lot..
Regards,
Xetro
Answered by Janice Cotcher. |
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Eccentricity of an Elliptical Orbit |
2008-08-20 |
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From Gina:
A satellite has an elliptical orbit around the earth with one focus at the earth’s
center, E. The earth’s radius is 4,000 miles. The highest point that the satellite is
from the surface of the earth is 800 miles, and the lowest is 200 miles.
What is the eccentricity of the satellite’s orbit?
Answered by Janice Cotcher. |
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A 30-60-90 triangle |
2008-08-20 |
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From ronie:
finding the sin,tan,sec,cos and csc.given is square root of 3 over 2.the question are how to find that?
Answered by Penny Nom. |
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A square with diagonal 200 metres |
2008-08-20 |
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From kelvin:
find the are and perimeter of a square with diagonal of 200 meters?
Answered by Penny Nom. |
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The game of 24 |
2008-08-20 |
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From Tasha:
I have four numbers a 6, a 6 a 5 and a 3, i can add subtract divide or multiply these numbers in anyway but i have to use all of them and call only use them once i have to come up with a total of 24
Answered by Penny Nom. |
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A water acid mixture |
2008-08-19 |
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From Sulagna:
A chemical solution is made by mixing an acid with water in the ratio 1:24.
This solution is then taken and mixed with water in the ratio 1:3. How much acid
would be there in 200ml of this final solution?
Answered by Penny Nom. |
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