An arithmetic sequence is given below. 8, 12, 16, 20,
write an explicit formula for the nth term an
an = ???
-please help

________

an = 8 + (n - 1) × 4

an = 8 + 4n - 4

an = 4n + 4

= 4n + 4

Step-by-step explanation:

The nth term (explicit formula) of an arithmetic sequence is

= a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 8 and d = a₂ - a₁ = 12 - 8 = 4 , then

= 8 +4(n - 1) = 8 + 4n - 4 = 4n + 4

answer: there are 453.592 grams in a pound.