Explain how to divide a over b divided by c over d

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?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?