In a farm there are x chickens and y pigs. if the total number of chickens and pigs in the farm is 30 ant the total number of legs is 80. a) form two simultaneous equations in x and y.

b) solve the equations to find the number of chickens and pigs in the farm.​

Your vet has placed your pet on a diet. the diet is to contain at least 12 mg of fat and at least 14 mg of protein per serving. these requirements are to be obtained from two food sources. source a contains 2 mg of fat and 2 mg of protein per serving. source b contains 1 mg of fat and 3 mg of protein per serving. if source a sells for $1.28 per serving and source b sells for $1.12 per serving, how many servings of each type should be purchased to satisfy the requirements at minimal cost?