Layla wants to buy fish, chicken or some of each. The fish cost $4 per pound and the chicken cost $3 per pound. She will spend at least $11 no more that $15. What is the system of inequalities to model this is situation

Answer 1

If there are f lbs of fish and c lbs of chicken, then

11 <= 4f+3c <= 15

Answer 2

well, I guess you also have to add

f >= 0
c >= 0