Describe the relationship between the values of the two 8's in the number 8,380,000

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

Can anyone me with 32,33,36,37,and 40.