The arithmetic sequence is 23, 25, 27, 29,........

The first term .

Find the common difference by subtracting successive terms.

The common difference (d) is 2.

Find the nth term, so using the nth term formula: .

                      (Substitute , and d = 2)

Distibute terms using distributive property: a(b – c)= ab – ac.

Apply commutative property of addition: a + b = b + a.

                               (Subtract: 23 – 2 = 21)

Find the 12th term in the sequence.

                         (Substitute n = 12)

                                    (Multiply: )

                                            (Add: 24 + 21 = 45)

The 12th term of the arithmetic sequence .