Mr. Sam is raising chickens or ducks on his farm. All chickens eat the same amount of feed per week, and all ducks eat the same amount of feed per week. If 4 chickens and 20 ducks eat a total of 34.80 kg feed per week, and 16 chickens and 15 ducks eat a total of 41.70 kg feed per week, how much feed does a chicken and a duck eat respectively per week?

14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = −4 5x + 3y = −6

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?

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y