Math Forum / Mathematics / Algebra Help / May 2008

Can you help with the formula on this one...
Beth won the rolling contest
She can choose 3 prizes from the prize bin.
In how many different ways can she choose prizes.

I'm wondering if there is anything especially problematic about the wording
of the questions I have posed on this newsgroup. I re-write one of them,
below, hoping this time it's all fully clear:
Take x and y to be integers.

In the Schaum's Outline to Liinear Algebra (p 47) the following
question is posed:
Let A =
[  1   3  ]

In the CSET math test prep book published by Research and Education
Association, the following problem is posed and solved:
For which of the following intervals is the graph of y = x^4 - 2x^3 -
12x^2 concave down? (-2, 1); (-1, 2); (-1, -2); (- infinity, -1).

Can anyone recommend good freeware or software for writing out math
equations?  I have some handwritten notes on transitioning from
quadratics to the standard form of parabola's that I'd like to convert
to readable computer copy.

Sorry to be a pain but can you help me with this problem.....
-----------
Between 50 and 100 people hired a private carriage for a railway trip,
and they paid a total of $2847.00. Each person paid the same amount,

Please can you help solve this problem from a psychometric test (had 2
minutes to solve it).
Does it resolve to a simultaneous equation?
------------------

I realize this is probably a stupid question, but if one has an
equation like
2log3x = 2 + log3(x-2), how does one account for the "2 +" part of the
equation on the left?

Hello again.
I am looking at the XAM practice book for the math CSET, which I hope
to take in July.  In it is the following problem:
[6 + 2sqrt(3)] / [4 - sqrt(6)] (sorry if I have gotten the conventions

Your answer is correct.  The book is incorrect.