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1 3 6 10 15.... |
2009-02-26 |
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From Allie:
1 3 6 10 15....
i know the pattern is +2 +3 +4 +5 and so on...but i dont know how to write an equation to find the nth term. help!
Answered by Robert Dawson and Claude Tardif. |
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36cm to the second power divide 10cm |
2009-02-26 |
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From val:
36cm to the second power divide 10cn
Answered by Penny Nom. |
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Two racers going around a track |
2009-02-26 |
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From larisa:
One racer makes a complete trip around the track every 28 seconds, while the other racer completes a trip around the track every minute. How many times will the first racer pass the second racer in 30 minutes?
Answered by Robert Dawson. |
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A triangular pyramid |
2009-02-26 |
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From Craig:
Can you help with this question:
Write the names of the faces and the number of each kind of face on a triangular
pyramid?
Answered by Penny Nom. |
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Multiplying in different bases |
2009-02-25 |
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From Susan:
11 base 2 X 22 base 3 + 33 base 4 = _________ base 5
Answered by Robert Dawson. |
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For what x is cos x is greater than root 3 over 2? |
2009-02-25 |
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From Robert:
cos x is greater than root 3 over 2
Restrictions: between 0 and 2pi
Answered by Harley Weston. |
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A rectangular prism |
2009-02-25 |
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From Christina:
I am trying to find the area of the base of a rectangular prism where one cube=_1 cu in. The Answer is given in square inches. I also need the volume of the prism in cu in. For example length=3, w=2, h=5
Answered by Penny Nom. |
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Collecting an army |
2009-02-25 |
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From bevaz:
Question from bevaz, a student:
A ruler orders his chamberlain to collect an army from 30 houses. The servant goes to the first house alone and collects one man. At each house after that he takes the same number of men as he has already collected, so at the second house he goes with one other and so on. How many men did he collect in all?
Answered by Penny Nom. |
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wo consecutive numbers with a product of 9506 |
2009-02-25 |
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From sofie:
find two consecutive numbers with a product of 9506
Answered by Penny Nom. |
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cos 2x = 2 sin x |
2009-02-25 |
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From Bobby:
cos 2x = 2 sin x
Answered by Harley Weston. |
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Some 9 letter permutations |
2009-02-24 |
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From Cecilia:
If the letters G, H, S are used exactly 3 times how many 9 letter combinations can be generated?
Answered by Penny Nom. |
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Triangles within triangles |
2009-02-24 |
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From Mari:
a large shaded triangle changes each day with a white triangle appearing
in the center of each shaded one. If this pattern continues, how many white
triangles will be there on the 6th day? On the 6th day, what fraction of
the large outer triangle will be white?THANKS!
Answered by Robert Dawson. |
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Trig functions without geometric data |
2009-02-24 |
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From bob:
I do not understand how it is possible to find the sine, cosine, or tangent of an angle if
there is no hypotenuse, opposite or adjacent side?!
Answered by Robert Dawson. |
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mutiplying decimals |
2009-02-24 |
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From telly:
how to do this sum0.24*0.398
Answered by Robert Dawson and Penny Nom. |
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Two pages are attendants of a king |
2009-02-24 |
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From Lauren:
Two pages are attendants of a king. For their service, one gets 13/6 dinaras a day and the other gets 3/2 dinaras. The first page owes the second 10 dinaras. Calculate when they will have the same amount.
Answered by Penny Nom. |
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