1) which two teams had the greatest point difference? 2) which two teams had the least point difference? 3) what was the average score of the 5 teams? 4) how many more points did epsilon score than beta? 5) which teams scored more than 2 times beta’s score?

1)Which two teams had the greatest point difference?
Delta and Beta (85 - 25 = 60)

2)Which two teams had the least point difference?
Delta and Gamma (85 - 75 = 10)

3)What was the average score of the 5 teams?
(45+25+75+85+65) / 5 = 295 / 5 = 59

4)How many more points did Epsilon score than Beta?
Epsilon: 65
Beta: 25 
65 - 25 = 40
Epsilon scored 40 more than Beta

5)Which teams scored more than 2 times Beta’s score?
twice of Beta = 25 x 2 = 50

answer
Gamma (75) , Delta (85)  and Epsilon (65)

X=y+4 is the answe