15% of the apples in a crate are rotten there are 12 rotten apples in the crate how many apples are in the crate

Ineed i don’t get this at all! and you

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.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)