In a sequence of numbers, a5=2, a6=7, a7=12, a8=17, and a9=22. Which equation can be used to find the nth term of the sequence, an?

an=5n−23

an=5n+2

an=2n+5

an=23n−5

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders