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Bedmas |
2008-08-25 |
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Robert pose la question : I am having some difficulty with the following equation:
200 * 5 / 2 - 450 + 25 Victoria West lui répond. |
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The square root of a fraction |
2008-08-24 |
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Lauren pose la question : 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 Penny Nom lui répond. |
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A linear system |
2008-08-23 |
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dipesh pose la question : 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 Penny Nom lui répond. |
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Radii and Chords Create a Non-Right Triangle |
2008-08-22 |
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Beary pose la question : 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. Janice Cotcher lui répond. |
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Simplifying Algebraic Expressions |
2008-08-22 |
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Jacky pose la question : x^2-y^2+4x+4y Penny Nom lui répond. |
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Two tangent circles |
2008-08-22 |
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Michele pose la question : A circle of radius 2 is externally tangent to a circle of radius 8,
How do you find the length of their common tangent. Penny Nom lui répond. |
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Function or Not? |
2008-08-22 |
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Katie pose la question : Determine whether y is a function of x:
[(x^2)y]-(x^2)+(4y)=0
....thx Janice Cotcher lui répond. |
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Converting centimetres to metres |
2008-08-21 |
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walter pose la question : how do you convert the smaller unit to a decimal of the larger unit and then solve
17 m - 130 cm Penny Nom lui répond. |
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Trough Filling with Water |
2008-08-21 |
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lanny pose la question : 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. Janice Cotcher lui répond. |
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Irregular polygon and Circle that Intersects All Sides |
2008-08-20 |
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Xetro pose la question : 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 Janice Cotcher lui répond. |
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Eccentricity of an Elliptical Orbit |
2008-08-20 |
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Gina pose la question : 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? Janice Cotcher lui répond. |
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A 30-60-90 triangle |
2008-08-20 |
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ronie pose la question : finding the sin,tan,sec,cos and csc.given is square root of 3 over 2.the question are how to find that? Penny Nom lui répond. |
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A square with diagonal 200 metres |
2008-08-20 |
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kelvin pose la question : find the are and perimeter of a square with diagonal of 200 meters? Penny Nom lui répond. |
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The game of 24 |
2008-08-20 |
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Tasha pose la question : 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 Penny Nom lui répond. |
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A water acid mixture |
2008-08-19 |
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Sulagna pose la question : 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? Penny Nom lui répond. |
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