Acar uses 5 2/3 gallons of gas for a 2 hour trip. how many gallons were used each hour

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Plzzz answer both questions and i will give you 100 points