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Differentiating inverses |
2002-11-20 |
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From Amy:
f(x)= x3+x+1, a=1 find g'(a) (g = f -1). I am having trouble finding g(a).
Answered by Penny Nom. |
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4 x abcd = dcba |
2002-11-20 |
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From A student:
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.
Answered by Penny Nom and Claude Tardif. |
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abc,abc |
2002-11-20 |
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From Pam:
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"
Answered by Penny Nom. |
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Round to hundredths |
2002-11-19 |
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From Brittany:
Can u tell me how to do a problem like this:
35 divded by 4.8= Round to hundreths.
Answered by Penny Nom. |
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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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From Elizabeth:
- 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?
Answered by Diane Hanson and Penny Nom. |
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The horse race |
2002-11-19 |
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From Pat:
The Horse Race Three horses run a race. In how many different ways can the three horses finish the race if ties are allowed?
Answered by Penny Nom. |
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Quatre vingts |
2002-11-18 |
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From Jacques:
pourqoui les Francais disent quatre vingts pour 80
Answered by Claude Tardif. |
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A cubic |
2002-11-18 |
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From Jessica:
"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.
Answered by Claude Tardif and Penny Nom. |
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Gears and ratios |
2002-11-17 |
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From Matt:
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
Answered by Penny Nom. |
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The 24 game |
2002-11-16 |
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From Michael:
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?
Answered by Penny Nom. |
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A 40% markup? |
2002-11-15 |
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From Amy:
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.
Answered by Penny Nom. |
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The product of two consecutive numbers is 41 more than their sum |
2002-11-15 |
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From A mother:
THE PRODUCT OF TWO CONSECUTIVE NUMBERS IS 41 MORE THAN THE SUM OF THE NUMBERS. WHAT ARE THE NUMBERS?
Answered by Penny Nom. |
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The substitution method |
2002-11-15 |
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From A student:
Solve by using the substitution method. x = 3y - 1
x + 2y = 9
Answered by Penny Nom. |
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A pattern in a table |
2002-11-14 |
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From Thamar:
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
Answered by Penny Nom. |
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Algebra |
2002-11-13 |
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From Carol:
I am a confused parent trying to help my dau hgter solve some math problems and I need help. 3[x-4]=27
Answered by Penny Nom. |
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