Is this true? 2.5 meters > 220 cm

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.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x