how to select, average and sort in mysql table

Question

i have a table in mySql like in this picture

and i want to write a query which

Answer 1

don't know if you're looking for something like this:

SELECT fields_list, (field_to_modify + (SELECT AVG(average_field) FROM table2)) AS order_field 
  FROM table1
WHERE your_conditions
  ORDER BY order_field;