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Marie achète un croissant et une tartelette |
2004-02-01 |
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From M. et Mme Simoneton:
Marie achète un croissant et une tartelette. Elle paie 1,64 €
Isabelle achète un croissant et un pain au chocolat. Elle paie 1,51 €
Marc achète un poain au chocolat et une tartelette. Elle paie 1,77 €
Trouver le prix d'un croissant, d'une tartelette et d'un pain au chocolat.
Answered by Claude Tardif. |
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Pairing boys and girls |
2004-02-01 |
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From Terri:
Suppose 7 boys and 7 girls are assigned to work in pairs of one boy and one girl. Explain what equation can be used and how you would use a simpler problem to solve these types of questions.
Answered by Penny Nom. |
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The vertex of a cone |
2004-01-29 |
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From Richard:
Please help me explain to my fourth graders as to why a cone has a vertex even though it does not have any straight edges.
Answered by Chris Fisher. |
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Intersecting a line and a curve |
2004-01-29 |
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From Senthil:
between line and curve how can i
find intersection point?
could you write me the formula and explanation also sir.
Answered by Penny Nom. |
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Is a cylinder a type of prism? |
2004-01-29 |
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From Rebecca:
Is a cylinder a type of prism?
Answered by Penny Nom. |
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Order of operations |
2004-01-28 |
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From John:
I am trying to find out any information concerning the development of the order of operations. for example, when (why/how) did it become the case that 2 + 3 x 5 =17, rather than 25.
any insight is appreciated. Thank you.
Answered by Penny Nom. |
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Sin(3x), cos(3x) and tan(3x) |
2004-01-28 |
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From Jon:
What is the identity for cos3x, sin3x, and tan3x? In class, we learned double angel identities and were asked to find out the identity to these three trig functions. If you can help, please do. Also, i know that the cos4x- sin4x is the same as cos2x. Is cos8x-sin8x = cos2x also true? Thank you.s
Answered by Chris Fisher. |
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Sets |
2004-01-27 |
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From Susan:
My child has the following problems to solve, and we are puzzled.
1. Compare the subset symbols to the inequality symbols of less than or greater than.
2. If A, B & C are sets such that A has 47 elements, B has 32 elements, and C is a proper subset of B, what can you say about the number of elements in the following sets: A U B? A intersect B? B U C? and B intersect C?
Answered by Penny Nom. |
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The London marathon |
2004-01-27 |
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From Nina:
After a years training, Minnie Midriffe increased her average speed in the london marathon by 25%. By what percentage did her time decrease?o
Answered by Penny Nom. |
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Ounces into cubic centimeters |
2004-01-27 |
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From A student:
how do you convert ounces into cubic centimeters? Ex: how does 12 oz. change into cc.
Answered by Penny Nom. |
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Three digit combinations |
2004-01-27 |
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From Kevin:
how many 3 digit combinations can be made with 0-9. i have been told only 1,000. when i asked jeeves the response was 750 without using any digit twice. i have entered a raffle and received a ticket with 4 sets of 3 digit numbers.
Answered by Penny Nom. |
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Lead weights |
2004-01-26 |
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From Jeff:
I am making a mold for my decoy anchors. I need
10 - 12 lead ounce weights. How would I determine the liquid measurement for that weight? For example if I melted down 10 ounces of lead how many cups would that be or quarter cups etc?
I would like the formula if I could and good instructions on how to use the formula.
Answered by Penny Nom. |
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Polynomials |
2004-01-25 |
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From Bruce:
A polynomial is defined as
Polynomial functions are functions that have this form:
f(x) = anxn + an-1xn-1 + ... + a1x + a0
The value of n must be an nonnegative integer. That is, it must be
whole number; it is equal to zero or a positive integer.
The coefficients, as they are called, are an, an-1,
..., a1, a0. These
are real numbers.
Questions:
- why must n be positive?
- what are some historical facts
about the evolution of the definition?
Answered by Harley Weston. |
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|x^2 - 12x| = 8 |
2004-01-24 |
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From Sherre:
|x2 - 12x| = 8
Answered by Penny Nom. |
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Bundles of asphalt shingles |
2004-01-24 |
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From Larry:
According to my study material 4:12 multiplying factor for shingles is 1.054. The question reads as follows: A building with a floor plan of 3350 sq. ft. and a roof slope of 4:12 will require _______ bundles of standard asphalt shingles.
Answered by Harley Weston. |
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