How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 1/31100.0*Average seed
Haftr 48 HANC 50 +0.6
YDE 49 Rambam 31 +0.1
Flatbush 71 SSLI 36 -0.1
Week of 2/5100.0*Average seed
HANC 74 D. Hatorah 49 +0.6
Magen David 54 YDE 43 +0.2
DRS 51 Haftr 48 -0.1
If winner is:HomeAway
Week of 2/12100.0*Average seed
HANC vs YDE+1.3-1.3
Shaare T. vs Flatbush+0.3-0.3

What If

Chances based on how well the HANC finish out the regular season.   Explain

100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs1234567891011Count
101-0In1003,372,169
90-1In50503,371,347
Total:In5025256,743,516
Games Above .500
Chance Will Make Playoffs