Ido not understand this work and i need in understanding this worksheet

Find the quotient. 50a2 – 98b2 -5a +7b

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.

Give all possible names for the line shown.calculation tip: lines can be written with either point first.