This week in Math 11 we learned how to solve arithmetic sequences, to solve a arithmetic sequence you need to remember a simple equation : tn = a + (n – 1) d.

So if we have the sequence 7, 10, 13, 16… then d (common difference) would be 3. If we wanted to find term 8 we would need to use the equation. So it would be = 7 + (8 – 1) 3. which would be = 28.