Which expression is equivalent to b^-2/ab^-5?
a) a/b^5
b)1/ab^5
c)a^3b/1
d)b/a

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?