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A number between |
1998-11-25 |
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From Jimmy Nikola:
A number is less than 3,425 + 8,630 and greater than 7,614 + 4,429. What could the number be?
This question is on page 93, question number 23. in Silver Burdett Ginn Math book, which is a 3rd grade math book.
Answered by Jack LeSage. |
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The bricklayers formula |
1998-11-24 |
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From Rachel Kaplan:
I have to do a report on the bricklayers formula N = 7LH. Can you give me any information on this.
Answered by Harley Weston. |
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Intersection of planes |
1998-11-22 |
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From Dave Rasmussen:
I am a teacher of secondary mathematics with a question about the uses of Three Dimensional Co-ordinate Geometry. I have been teaching my students to write equations of planes and lines, - to find the intersection of these and the distance between them. What I am having difficulty finding are good applications of these techniques to "real world" situations. Can anybody help me?
Answered by Walter Whiteley and Harley Weston. |
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Fraction division |
1998-11-18 |
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From Brett Darrough:
I am needing specific examples that illustrate division of fractions with In-depth understanding. I am enrolled in a CGI (cognitivly guided instruction) course which is trying to develop a method of teaching fraction division with understanding. Most people invert and multiply to obtain a correct answer. Why? I would like help in understanding this method that includes pictures and algorithms that illustrate reasoning and depend on understanding.
Answered by Jack LeSage and Harley Weston. |
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A tetrahedron inscribed in a cube |
1998-11-18 |
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From Jane:
In analyzing a cube, I would like to find a tetrahedron inscribed in the cube which has none of its faces in the planes of the faces of the cube. I would like to see this tetrahedron outlined in the cube. My name is Jane and my e-mail address is BARSOIAN. I am an elementary education student.
Answered by Walter Whiteley. |
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Three dice |
1998-11-17 |
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From Ryan Allinson:
Rolling three regular dice how many different ways could a sum of 10 be rolled? Hope you can help. Can you please show me how this is done?
Answered by Penny Nom. |
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Linear systems of equations |
1998-11-16 |
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From Crystal Girvan:
My name is Crystal Girvan.Im in grade 11. I have a question.We are solving linear systems of equations: comparison method. My questions is. it says a)use the method of comparison to solve this system a=b-1, 3a+ b=3 b) verify your solutin in a I dont understand it. please help
Answered by Jack LeSage. |
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Terminating decimals |
1998-11-16 |
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From Debra Karr:
A college student studying elementary education asked me a question that I could not think of the correct answer. How can you look at a fraction and tell if is a terminating or non terminating decimal?
Answered by Jack LeSage and Penny Nom. |
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A trig limit |
1998-11-14 |
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From Amy Atwell:
what is the limit of of tanx / x + sin x as x approaches 0
Answered by Harley Weston. |
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Golf Problem - The Sequel |
1998-11-13 |
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From Bob:
Sixteen golfers, seven rounds. What are optimum combinations for each golfer to play with as many different golfers as possible? Many thanks,
Bob Payson
Answered by Denis Hanson. |
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What's the next term? |
1998-11-12 |
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From Ilia:
What the formula and explonation for formula for next patterns: 1) 1, 4, 10, 20, 35, 56, 84,... 2) 0, 6, 30, 90, 210, 420,... Thanks!
Answered by Penny Nom. |
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Arithmetic Progressions |
1998-11-12 |
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From Gerry Boser:
It has been years since I was in school and I can't remember if there is a formula for the following problem: If you deposit $1.00 on the first day of the month, $2.00 on the second day, $3.00 on the third day . . $31.00 on the last day of the month, how much do you have in the bank? Now will this formula also work if it was, $0.25 (then day two you would deposit 2x $0.25 or $0.50, day three you would deposit 3x $0.25, $0.75. . . ). Will it work with any denomination?? Thank you for your time. I promise I'll write this one down for future reference. . .
Answered by Penny Nom. |
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Two sides and a bisectrix. |
1998-11-11 |
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From Victor Grinshtein:
I am looking for someone who can tell me how to construct a triangle by 2 sides and a bisectrix using a compass and a ruler.
Answered by Chris Fisher. |
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Centimetres |
1998-11-11 |
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From Vicky Caldwell:
I work in Carpet Manufacturing and I need to know how to figure the calculation for a roll of carpet in centimeters. For example: a 12 x 100 roll of carpet equals 133.34 square yards, which is 100 linear ft. and 1,200 square foot. Can you please tell me how I would figure to get CENTIMETERS???????
Answered by Jack LeSage. |
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Touch Math |
1998-11-09 |
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From Melinda Robinson:
I am a contracted district substitute teacher for grades K-8. My teacher education courses did not include anything about "touch math," a system used by some of the teachers for whom I sub. Is there a book available that I could acquire to teach this system to myself, and have as a reference?
Answered by Harley Weston. |
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