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A quartic polynomial that is a perfect square |
2012-02-05 |
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archit pose la question : If P(x)=x^4+ax^3+bx^2-8x+1 is a perfect square then (a+b)=? Penny Nom lui répond. |
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Two sectors of a circle |
2012-02-03 |
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Wayne pose la question : I am not even sure what to ask. I have to two lengths of feet and an angle of degrees, and I have to find the area?
**Problem attached
Thanks,
Wayne Penny Nom lui répond. |
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A rectangular block and a sphere |
2012-02-02 |
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snehal pose la question : a solid rectangular block of metal 49 cm. by 44cm. 18cm. is melted and formed into a solid sphere, find the radius of the sphere[22/7] Penny Nom lui répond. |
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There is a police officer in pursuit of suspect |
2012-02-01 |
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Jay pose la question : There is a police officer in pursuit of suspect. They suspect is driving on a straight road traveling at 79 mph, the officer is 233 yds away, traveling at 92 mph, the suspects car 5 ft long and the officers car is 5.3 ft long, how long will it take to have the front of the officers car, equal to the front of the suspects car down to the tenth of a second. Harley Weston lui répond. |
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If a parallelogram is a cyclic quadrilateral then it is a rectangle |
2012-02-01 |
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Kim pose la question : Show that if a parallelogram is a cyclic quadrilateral then it is a rectangle.
Hint: Observe that in a parallelogram ABCD we always have Triangle ABC is congruent to Triangle CDA. Robert Dawson and Chris Fisher lui répond. |
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Properties of real numbers applied to subsets |
2012-02-01 |
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Mark pose la question : Hello -
The questions that I have for you is do the properties of real numbers (such as the associative, commutative, identity, inverse, and distributive law) apply to ALL the subsets of real numbers? In other words, do all those properties work for the Natural Numbers? The Whole Numbers? And so on and so forth. I understand that they are all real numbers, but for instance: the identity is whenever you add zero to a number, you get that number back. But does that work with, say, with only the odd numbers? Zero isn't odd so can that property actually apply to JUST the odd numbers? Any consideration would be greatly appreciated! Robert Dawson lui répond. |
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The dimensions of a rectangle |
2012-01-31 |
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Dazz pose la question : Hi I was wondering how to find the length of a rectangle if you know the area is 484 square inches And the length is 10 square inches or 22 square inches?
Thanks~Dazz Penny Nom lui répond. |
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Two cars in a race |
2012-01-30 |
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Christine pose la question : In a car race, the speed of one car is 120kph and the other car is 105 kph. If the faster car finished the race 20 mins before the slower one, what was the distance of the race? Thanks for the answer and the previous answer to my question. Penny Nom lui répond. |
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A two digit number |
2012-01-29 |
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Christine pose la question : Five times the sum of the digits of a two digit number equals the number. If the digits are reversed, it becomes nine more than the original number. What is the original number?
I really don't understand this question, help me please Penny Nom lui répond. |
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Building a tipi |
2012-01-29 |
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Lacy pose la question : Hi there!
We are building a tipi for our children. We want to build a large one about 15ft tall with a base of about 15 feet diameter. I am trying to figure out how much canvas we need to accomplish this. I graduated about 20 years ago and am struggling. Please help if you can. Penny Nom lui répond. |
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The volume of a dugout |
2012-01-28 |
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Jan pose la question : is there a formula for calculating the cubic yardage removed from a dugout
for example that is forty feet wide by one hundred and twenty feet long by
twelve feet deep with a three to one slope? It is the slope that makes it a
little tricky. Thank you. Penny Nom lui répond. |
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Tons of fill dirt |
2012-01-27 |
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Brian pose la question : about how many tons of fill dirt would I need to level a area 30 foot by 30 foot
and 6 foot deep Penny Nom lui répond. |
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The area of a triangle |
2012-01-27 |
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mary pose la question : I have a scalene triangle and the base is 33m, side is 52m and the unparallel side is 25m but i drew a dotted line down and that s 20m
how do i figure the area?
thanks Penny Nom lui répond. |
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1 + 3 + 3^2 ...+3^(n-1) = 3^n - 1/2 |
2012-01-27 |
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Vicki pose la question : I am trying to find out how to do show how this proof was worked.
Here is the end result 1 + 3 + 3^2 ...+3^(n-1) = 3^n - 1/2
This equation was used to find the number of white triangles in the Sierpinski Triangle Walter Whiteley lui répond. |
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I need to make a 45,000 pound batch of this 80% MgO product |
2012-01-26 |
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James pose la question : I have a 55% MgO product and 89% MgO product. I have unlimited pounds of each MgO product. I am looking to make a 80% MgO product. I need to make a 45,000 pound batch of this 80% MgO product. Penny Nom lui répond. |
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