How are these numbers calculated?

Big Games

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

Week of 2/2100.0*Average seed
HANC 65 Ezra 25 +0.5
Haftr 43 North Shore 40 +0.2
YDE 45 Rambam 31 -0.2
JEC 64 Magen David 79 -0.1
If winner is:HomeAway
Shaare T. vs North Shore-0.1+0.1
If winner is:HomeAway
Week of 2/9100.0*Average seed
Magen David vs North Shore-0.2+0.3
Magen David vs Flatbush-0.1+0.1
YDE vs Magen David+0.1-0.1

What If

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

100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910Count
70-0In25755,457,120
Total:In25755,457,120
Games Above .500
Chance Will Make Playoffs