48/4 = 12 teaspoons per each batch
454/12 = 37.83 batches can be made
3.49/37.83 = 0.092$ per each batch
The answer is c 6+15x+15x
1. There are 2 dogs to every 1 cat.
2. There are 20 students for every 1 teacher.
3. There are 4 sugar cones to every 7 waffle cones.