Algebra work please help

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

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?

Adeposit of 5500 at 6% for 3 years equals