Please help with numbers 5 and 6

Does anyone know of a quizlet or something for edmentrum /plato algebra 1

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.

9/10 divide by -3/15 as a mixed number