How can i use operations to model real world problems?

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.

Find the area of an equilateral triangle with a side of 6 inches

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)