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Math websites to prepare for test HELP
Posted: Thu Jul 13, 2006 6:57 am
by Ganzo
My wife is going back to school this fall. This school requires math test to get in. They gave her sample questions, and bot me and her long forgot how to solve those kind of problems. She's got 3 weeks before test, any segestions what she can do to refresh her knowlege. Maybe websites she can go to to read up on it.
here's example of problem on test:
3.65 x 10 to 2 power M/sec times 6.79 x 10 to neg 8 power sec/cycle
I don't remeber this shit anymore
HELP
Posted: Thu Jul 13, 2006 8:06 am
by Gidan
3.65 * 6.79 x 10 to the (2 - 8).
24.7835 x 10 to the -6
2.47835 x 10 to the -5
Posted: Thu Jul 13, 2006 8:10 am
by Griever
God I hate math
Posted: Thu Jul 13, 2006 8:21 am
by Granh
http://mathforum.org/ is a great place to get info on all things math. Pretty much any question you've got, you can find there, or Ask Dr. Math.
Posted: Thu Jul 13, 2006 9:13 am
by Witty
Excellent site~
Posted: Thu Jul 13, 2006 9:27 am
by Eldred
x^2-4x+5=0
Posted: Thu Jul 13, 2006 9:30 am
by Snero
one thing that people often get wrong or ignore is the units, always make sure you keep track of them. They can be a life saver when you're not quite sure how the numbers fit in, or you want to convert something
Posted: Thu Jul 13, 2006 9:56 am
by Gidan
Eldred wrote:x^2-4x+5=0
Thats just not a very nice question to ask
Posted: Thu Jul 13, 2006 10:02 am
by Eldred
hehe it's kind of a trick question, once you compleat the square your left with having a negative ratical. As I looked back over the question I posted I miskeyed the 5 it was supposed to be 4 so it would have looked like
x^2-4x+4=0
Witch is kinda easy cause it factors down into
(x-2)(x-2)=0
So your left with
x=2
2^2=4
-4(2)=-4
+4=0
Posted: Thu Jul 13, 2006 10:22 am
by Gidan
haha yeah, the small change make a huge difference
Posted: Thu Jul 13, 2006 12:13 pm
by Darcler
Go to barnes and noble and get her some SAT math prep books, that's pretty much what they are going to put on the entrance exams.