Ahotel offers two different types of rooms the expression. the expression k + 2f gives the number of beds in the hotel where k is the number of rooms with a king size bed and f is the number of rooms with 2 full size beds. what are the terms of the expression?

6th grade math

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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?