How do i do this with modelimg with systems of equations common core algebra 1

During your cycling trip, you and your friends often stayed in hostels. the prices of these are listed below. hostel standard room (price per night) with breakfast (price per night) super sleep hostels £22.45 £28.65 normandy nights £18.55 £25 zzzola hostels £24.50 £30.99 belgian beds £11.20 £18.55 night-time rest days ? £33 what is the range in cost for a single night, including both standard room prices and with breakfast prices?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd