+118735 
+118735 Wed 8/4/15
FTJ means "For the Juniors"
1) Solving quadratic inequalities Thanks CPhill
2) Finding the constant of variation Melody
3) Rationalizing the denominator Melody
4) Solving Trig equations Thanks CPhill
5) Function Notation FTJ Thanks CPhill
6) A good volume question Thanks Alan
7) Functions and their graphs Thanks CPhill, Alan and Melody
8) Scientific notation and significant figures FTJ Thanks anon and Melody
9) Counting again. I must have tooo much time one my hands LOL
10) Trig identity proof Not answered.
♫♪ ♪ ♫ ♬ ♬ MELODY ♬ ♬ ♫♪ ♪ ♫
+118735 P stands for permutations and C stands for combinations.
Here is a introductory video clip on combinations and permutation.
https://www.youtube.com/watch?v=hJRXKq2GEo8
3C2 means how many combinations of 2 can you get from 3 objects I'll call them A,B,C
Well you can get AB, AC, or BC so 3C2=3
3P2 means how many permutations of 2 can you get from the 3 objects
Well with permutations order counts so you can have
AB or BA, AC or CA, BC or CB SO 3P2=6
nCr means how many combinations of r objects can you take from n objects.
nPr means how many permutations of r objects can you take from n objects. 
