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Find the nth term |
2007-02-27 |
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From Dinky:
My teacher has set us a project, but i am having trouble finding the nth term for this. the numbers are: 1, 2, 6, 24, 120 could you please help me? thank you dinky113
Answered by Stephen La Rocque and Penny Nom. |
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x^3 + y^4 = z^5 |
2007-02-27 |
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From Mike:
Is there a known solution to the equation: x^3 + y^4 = z^5? This is not for marks. Just a curiosity. Thank you for your time.
Answered by Stephen La Rocque. |
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A logarithm of a product and the product of logarithms |
2007-02-27 |
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From Sharon:
Can you please explain Explain the difference between a logarithm of a product and the product of logarithms and give examples of each?
Answered by Stephen La Rocque and Penny Nom. |
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Social security numbers |
2007-02-27 |
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From Tish:
Social Security numbers are in the form ###-##-####, where each symbol represents a number 0-9, how many are possible with this format? Will we ever run out of Social Security numbers?
(This is one question with two parts, I saw some examples but I am still confused because if there are 1 million possibilities then how have we been able to issue out numbers to over 280 US citizens?) (For the second part a yes or no answer is sufficient)
Answered by Penny Nom. |
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The lateral area of a cone |
2007-02-27 |
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From Michael:
Ive seen the other question about surface areas. I still don't understand the lateral area. In my math book, it has (pi * r * L) as the equation, r = radius and L = height of the cone. This is 8th grade math. Thanks.
Answered by Penny Nom. |
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The radius of a cone |
2007-02-26 |
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From lee:
hi i have a cone to calculate, the height and radius are equal and the slant height is 0.5m
the total surface area is 15m sq i need to calculate the radius of the cone Note : this will lead to a quadratic equation could somebody have a look please Thanks Lee
Answered by Penny Nom. |
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Four digit numbers |
2007-02-26 |
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From Anton:
Hello! I would like to ask you how many combinations are possible using 4 digit number. # # # # (1...9).There is no zero,numbers don't repeat,second and forth are odd.Thanks
Answered by Penny Nom. |
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Who won the backstroke? |
2007-02-26 |
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From Timothy:
Three girls held a series of swimming races among themselves. They decided to award a positive whole number of points for finishing first, second and third, where the number of points for first was more than the number for second, which was more than the number for third. The same number of points was awarded for the place in each race. There were no ties.
The first race was breaststroke. Altogether Sarah accumulated 20 points, Michelle 10 points and Catherine 9 points. If Sarah did not win the backstroke race, who did win the backstroke?
Answered by Penny Nom. |
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Solve for c |
2007-02-26 |
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From Steffane:
A over m = b over c sorry I can't put them over each other
Answered by Penny Nom. |
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How old are they now? |
2007-02-26 |
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From Ali:
Please help us. My daughter can't get this answer. The sum of Louise's age and Todd's age is 34. 5 years ago the sum of twice Louise's age and 3 times Todd's age was 61. How old are they now?
Answered by Haley Ess and Steve La Rocque. |
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Evaluating a determinant |
2007-02-25 |
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From Suud:
Please send me the detailed steps of calculating the determinant of the following 4by4 matrix -1 -3 1 2 -2 0 -1 1 3 2 0 4 0 -3 1 -2
Answered by Haley Ess. |
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How many cubic yards can my truck hold? |
2007-02-25 |
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From Mike:
If I have a dump truck that has a box that is 14' long sides that are 3.5' high and the width is 7.5' wide... how do I figure out how many cubic yards this truck can hold?
Answered by Steve La Rocque, Penny Nom and Melanie Tyrer. |
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What are the two numbers? |
2007-02-25 |
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From Thomas:
Two numbers have a total of 32 and a difference of 14. What are the two numbers?
Answered by Stephen La Rocque. |
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vectors |
2007-02-25 |
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From harsh:
Two vectors U= Uxi -6j +k And V= -3i +Vyj +k. Their dot product U.V= -35. AND the magnitude of their sum is |U+v|= 3. What are the components of Ux and Vy ?
Answered by Stephen La Rocque. |
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Finding domains using number lines |
2007-02-25 |
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From Saher:
Discuss domain of the function, f(x)= (x+1)(x-2) / (x+3), with the entire thing under a square root.
I'm being taught how to find the domain using the number line. Our teacher says that there are 5-6 choices, but I get stuck somewhere around 2, and I don't know how to give my answers after I've obtained the first one, which seems to be (3, infinity). HELP!! Thank you
Answered by Stephen La Rocque. |
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