Cynthia uses 15 1/2 gallons of gas while driving 310 miles in her car. What is the unit rate of miles per gallon? no links please​

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.