How is adding polynomials different from subtracting like terms?

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.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

For what value of (y) is 3^3/3^y =1/9