Valerie and Marco who are cousins are going on a trip to see their grandparents. Each child rides in their own family’s car at the end of the trip valeries family determined they traveled at an average rate of 47.5 miles per hour Marcos family determined they traveled at an average rate of 55 miles per hour

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110

i belive the biggest ratio would be 18: correct me if im wrong

answer is  

a.

16.1

hope you got it chief.