Whitney already owns 10 hair bands, and additional hair bands are priced at 1 for a dollar. How much money does Whitney need to spend on new hair bands in order to own a total of
22 hair bands?

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same