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U(n+1) = 2Un + 1 |
2011-05-22 |
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From Cillian:
In a certain sequence, to get from one term to the other you multiply by 2 and add 1, i.e. This is a difference equation of form: U(n+1) = 2Un + 1. prove that there is a maximum of 2 perfect squares in this sequence
Answered by Claude Tardif. |
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Problem solving with fractions |
2011-05-21 |
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From emilyd:
I had a packet of sweets. I put 1/5 of the sweets into Container A, 1/3 of them in Container G, 10 sweets in container C and the rest in container D. If the number of sweets in container D is equal to 75% of the total number of sweets in container A and B, how many sweets are there altogether?
Answered by Penny Nom. |
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What is the angle of decent? |
2011-05-20 |
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From Taten:
So you have an airplane with an altitude of 5.8KM. It has 46KM till the run way. What is the angle of decent?
Answered by Penny Nom. |
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Draping a room with fabric |
2011-05-19 |
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From Maria:
I need to drape an entire room with fabric. The width of the fabric is 120 inches.
How many yards of fabric do I need if the room is 4000 sq ft. (50 x 80 ft) and the ceiling is 12 ft. high.
Answered by Penny Nom. |
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A pipe in a ditch |
2011-05-19 |
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From Jim:
How many cubic feet of stone will it take to fill to six inches around a 4 inch pipe in a ditch 128 ft long x 20 in wide?
Answered by Penny Nom. |
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The length of a belt around three pulleys |
2011-05-18 |
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From Grant:
I need to calculate the belt length around these pulleys, please can you
help or refer me?
Known variables
D - Large Pulley Diameter
d - Small Pulley Diameter
c - Center Distance between D and d
T - Tension Pulley Diameter
x - Horizontal Distance between T and d' Centers
y - Vertical Distance between T and d's Centers
I need to calculate the belt length around these pulleys.
Kind Regards,
Grant
Answered by Harley Weston. |
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Exponential form |
2011-05-18 |
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From Kara:
How do I write this in exponential form?
log 1/8 = -3
Answered by Penny Nom. |
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A rational number |
2011-05-17 |
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From owais:
according to definition of irrational number "a number which cannot be
expressed in p/q form is called irrational number"
square root of 2 is a irrational number but if i round off the digit correct
to two decimal places so it becomes 1.41 and we can easily convert
into p/q form so it is a rational number ???
Answered by Penny Nom. |
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What was his salary before the raise? |
2011-05-16 |
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From Annette:
Need to show all my work and round to the nearest dollar.
If James received a 9% raise and is now making $102.00 per year, what was his salary before the raise?
Answered by Penny Nom. |
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Numbers with a digit 9 |
2011-05-13 |
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From Veronica:
How many numbers between 200 and 750 have a 9 for at least one of the digits?
Answered by Penny Nom. |
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Two whole numbers |
2011-05-11 |
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From yolanda:
The sum of two whole numbers is 12.If the sum of the squares of those numbers is 74,what are the two numbers?
Answered by Penny Nom. |
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What is the perimeter if the area is 20 ft? |
2011-05-10 |
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From Brooke:
What is the perimeter if the area is 20 ft?
Answered by Penny Nom. |
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Find two numbers whose difference is 153. |
2011-05-10 |
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From Scott:
Find two numbers whose difference is 153.
Answered by Penny Nom. |
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Golf with 36 players |
2011-05-09 |
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From Terry:
What is the calculation to have 36 players play in a different foursomes each week. I would guess this would take 12 times but do not know how to figure this out
Answered by Victoria West. |
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The domain of a function |
2011-05-08 |
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From Minks:
(x^2 + 1 / x^2 +2x - 3 ) X ( x^2 -9 / x^2 - 2x - 3)
Answered by Penny Nom. |
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