Andrew's Tithe Review

Examining the biblical evidence for the teaching of tithing. Do Christians have to return %10 to support the gospel? What about Abraham the father of Christianity returning tithe to Melchizedek? Why did Jacob in Genesis 28 define tithe as applying to everything that God would give him? What do scholars and theologians say about the biblical evidence for/against tithing? What are the strongest Bible based arguments and evidence for tithing?