An architect built a model of a 220-foot tall building he is designing. the model is 25 inches tall and 10 inches wide. how wide is the actual building?

Can somebody me out with this question

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !