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Differentiating inverses |
2002-11-20 |
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Amy pose la question : f(x)= x3+x+1, a=1 find g'(a) (g = f -1). I am having trouble finding g(a). Penny Nom lui répond. |
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4 x abcd = dcba |
2002-11-20 |
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A student pose la question : Say you have a four digit number (e.g. abcd) and you multiply the number by 4. The answer you get will be the reverse order of the number you started with (dcba). What is the number? The four digits (a,b,c,d) cannot be the same number or cannot be repeated. Penny Nom and Claude Tardif lui répond. |
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abc,abc |
2002-11-20 |
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Pam pose la question : Prove or disprove that "every number of the form abc,abc (where a, b, and c represent digits) is divisible by 7,11, and 13" Penny Nom lui répond. |
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Round to hundredths |
2002-11-19 |
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Brittany pose la question : Can u tell me how to do a problem like this:
35 divded by 4.8= Round to hundreths. Penny Nom lui répond. |
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Why is 5 divided by 1/7 greater than 5 divided by 2/3? |
2002-11-19 |
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Elizabeth pose la question :
- Without performing the division, explain why 5 divided by 1/7 is a number greater than 5 divided by 2/3.
- Is the least common multiple of two prime numbers always their product? Why or why not?
Diane Hanson and Penny Nom lui répond. |
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The horse race |
2002-11-19 |
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Pat pose la question : The Horse Race Three horses run a race. In how many different ways can the three horses finish the race if ties are allowed? Penny Nom lui répond. |
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Quatre vingts |
2002-11-18 |
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Jacques pose la question : pourqoui les Francais disent quatre vingts pour 80 Claude Tardif lui répond. |
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A cubic |
2002-11-18 |
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Jessica pose la question : "For what values of the constant p does f have 3 distinct real roots?" The function is f(x)= x3 - 6x2 + p, where p is an arbitrary constant. Claude Tardif and Penny Nom lui répond. |
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Gears and ratios |
2002-11-17 |
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Matt pose la question : if gear A has 12teeth and Gear B has 16teeth and gear C has 10teeth and gear A turns 40 times how many times will gear C turn Penny Nom lui répond. |
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The 24 game |
2002-11-16 |
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Michael pose la question : Hello, my name is Michael and I am in elementary school .. We have a game we play in math class called 24 game. In it each card has 4 numbers on it. Each number can only be used once, in any order, using multiplication, subtraction, division, or addition. We are stuck on one and wondered if you could help. The four numbers are 10-9-16-4. And they must equal 24. Any clues? Penny Nom lui répond. |
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A 40% markup? |
2002-11-15 |
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Amy pose la question : Please help? I own a basket and bouquet company, I have two retail stores with a markup of 40% on the price of the items I sale to them. I do not understand their conversion chart and I hope you can help me. A bouquet that I sale for $12.50 wholesale to the retail is marked up at a rate of 1.675 or (40%). I do not understand how the calculation of 1.675 is arrived at ... how is this 40%. I was told to multiply my wholesale price of $12.50 X 1.675 and I would arrive at the markup price of 40% the retailer would sale the item for. Penny Nom lui répond. |
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The product of two consecutive numbers is 41 more than their sum |
2002-11-15 |
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A mother pose la question : THE PRODUCT OF TWO CONSECUTIVE NUMBERS IS 41 MORE THAN THE SUM OF THE NUMBERS. WHAT ARE THE NUMBERS? Penny Nom lui répond. |
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The substitution method |
2002-11-15 |
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A student pose la question : Solve by using the substitution method. x = 3y - 1 x + 2y = 9 Penny Nom lui répond. |
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A pattern in a table |
2002-11-14 |
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Thamar pose la question : how do you solve for pattern in a table like
the top row is | 2 | 6 | 12 | 17 | z | the bottom row is | 9 | 13 | 19 | 24 | blank | question ask in each blank space write a rule to find the next number in the table Penny Nom lui répond. |
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Algebra |
2002-11-13 |
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Carol pose la question : I am a confused parent trying to help my dau hgter solve some math problems and I need help. 3[x-4]=27 Penny Nom lui répond. |
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