There are at most 36 red and blue marbles in a bag. the number of red marbles is twice the number of blue marbles. write and solve an inequality that represents the greatest number of red marbles r in the bag.

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years