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Induction |
2006-10-31 |
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From Ross:
Suppose that A and B are square matrices with the property AB= BA. Show that AB^n = B^n A for every positive integer n.
Answered by Stephen La Rocque and Penny Nom. |
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The area of an irregular hexagon |
2006-10-30 |
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From Ashish:
I want to find out area of an irregular HEXAGON in square feet, whose sides are as follows,
Answered by Stephen La Rocque. |
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Selling Price using Profit Margin |
2006-10-29 |
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From Chris:
What is the selling price of my inventory, find using the profit margin? Inventory A costs $2,300. The profit margin is 55% Inventory B cost is $4,500. The profit margin is 210%.
Answered by Penny Nom. |
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The surface area of a triangular prism? |
2006-10-29 |
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From Amanda:
What is the formula for the surface area of a triangular prism?
Answered by Haley Ess. |
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The sum of 2000 consecutive integers is 1000 |
2006-10-29 |
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From Matias:
if the sum of 2000 consecutive integers is 1000, then the sum digits of the greatest of these 2000 integers is?
Answered by Penny Nom. |
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Three consecutive integers |
2006-10-29 |
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From Jimmy:
Basically i want to know how you prove that the product of any 3 consecutive integers is a multiple of 6
Answered by Stephen La Rocque. |
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The real numbers with decimal representations consisting of all 1s. |
2006-10-29 |
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From Ivessa:
Determine if the following set is countable or uncountable : the real numbers with decimal representations consisting of all 1s.
Answered by Steve La Rocque and Walter Whiteley. |
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The distance from a point to a line in 3 space |
2006-10-29 |
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From Marie:
find the distance from the point (1, -2, -3) to the line x = y = z-2
Answered by Penny Nom. |
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An octagonal deck |
2006-10-29 |
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From R.M.:
I am building an octagon deck and I want to know what length to cut the outside boards.The overall is 12ft. wide.
Answered by Penny Nom. |
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Zero as an exponent |
2006-10-28 |
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From Don:
Any real number (except zero) to the zero power equals 1 correct?
Question: If for example x to the zero power equals 1
What is -x to the zero power equal to?
What is -(x) to the zero power equal to?
Answered by Penny Nom. |
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An odd number of factors |
2006-10-28 |
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From Anthony:
What is the common name used for numbers that have an odd number of factors? This answer should be a two word answer only.
Answered by Stephen La Rocque. |
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How many sequences are possible? |
2006-10-28 |
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From Sam:
A fair eight-faced die with faces numbered 1,2,3,4,5,6,7 and 8 is tossed six times and the sequence of numbers is recorded. How many sequences are possible?
Answered by Penny Nom. |
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How much labor should the firm employ? |
2006-10-28 |
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From Christy:
A dressmaking firm has a production function of Q=L-L(squared)/800. Q is the number of dresses per week and L is the number of labor hours per week. Additional cost of hiring an extra hour of labor is $20. The fixed selling price is P=$40. How much labor should the firm employ? What is the resulting output and profit? I am having a difficult time with this, HELP!
Answered by Stephen La Rocque. |
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LCM and HCF |
2006-10-28 |
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From Henry:
Is there a unique solution to the question: If the LCM and HCF of two numbers are 180 and 15 respectively, what are the two numbers? I got 45 and 60. I got a feeling there are others.
Answered by Stephen La Rocque. |
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Direct and Inverse variation |
2006-10-27 |
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From Vishalinee:
i'm not sure how to use the words direct variation and inverse variation to describe thre relationship between: a. speed and distance
b.speed and time
c. distance and time. and then i need to create equations using the descriptions. i am really messed up with direct and inverse variation.
Answered by Karen McIver. |
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