Answer:
Arithmetic sequence formula is: [tex]a_n = 20 + (n - 1) \times 4[/tex]
After 9 customers there are 52 tires in the bin
Step-by-step explanation:
The general arithmetic sequence formula is:
[tex]a_n = a_1 + (n - 1) \times d[/tex]
where [tex]a_1[/tex] is the first term, [tex]a_n[/tex] is the nth term, n is the term position and d is the common difference.
Assuming [tex]a_1[/tex] = 20
The second term is 24, then:
[tex]24 = 20 + (2 - 1) \times d[/tex]
d = 24 - 20 = 4
So, for this case, the arithmetic sequence formula is:
[tex]a_n = 20 + (n - 1) \times 4[/tex]
With n = 9:
[tex]a_9 = 20 + (9 - 1) \times 4[/tex]
[tex]a_9 = 52 [/tex]
