Astore is having a sale on chocolate chips and walnuts. for 8 pounds of chocolate chips and 4 pounds of walnuts, the total cost is $21 . for 3 pounds of chocolate chips and 2 pounds of walnuts, the total cost is $9 . find the cost for each pound of chocolate chips and each pound of walnuts.

The way you set the question up is confusing

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.