Tanisha takes a dance class that is priced as shown. The charge appears as negative on her account balance until she makes her monthly payment. ($12.50 per class) Part A
Write and solve an equation that shows how to find the balance, in dollars, of Tanisha’s account for dance classes during a 4-week period in which she attends 3 classes per week.
Part B
Suppose the balance on Tanisha’s account for a 2-week period is –$100.

If Tanisha attended at least 1 dance class per week, how many ways could she split the classes between the two weeks?