Janice paid $820 plus 7% sales tax for her airfare. How much did she pay in total for her airfare?

The product of two negative rational numbers is always zero sometimes zero never zero

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?

What’s -11-33k and factor each expression completely