Find two numbers if their sum is 6.1 and their difference is 1.6

  best answer for the question.1.     divide  7/24  by  35/48  and reduce the quotient to the lowest fraction. 

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?