Find the 20th term in the following arithmetic sequence 12,15,18,

Step-by-step explanation:

The formula for the arithmetic sequence is

, where

n is the position of the number you are looking for, a₁ is the first number in the sequenc, and d is the arithmetic difference (the difference between each number in the sequence).  For us:

n = 20,

a₁ = 12, and

d = 3.  ∴

our formula is this one:

and

and

so

a = 69

answer: '

the distance between points l and m

step-by-step explanation: