Amy checks out four books from the library. the next week, she checks out six books. the week after that amy checks out eight books.

is this a geometric or arithmetic sequence? what is the given ratio/difference?

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?