PLZ HELP Solve the following and show all work:
The city’s convention center has been bringing in truckloads of chairs. They are setting them up in rows in front of the stage. The first row has 10 chairs in it. Each row has 2 more chairs than the row in front of it. How many chairs will be in the 24th row?

Afamily has two cars. the first car has a fuel efficiency of 25 miles per gallon of gas and the second has a fuel efficiency of 15 miles per gallon of gas. during one particular week, the two cars went a combined total of 1025 miles, for a total gas consumption of 55 gallons. how many gallons were consumed by each of the two cars that week?