What is the seventh term of the sequence whose nth term is (n + 1)(n − 2)?
a.) 28
b.)35
c.) 36
d.) 40

To do this, you simply substitute 7 into the equation. 

[(7) + 1][(7) − 2]
BODMAS tell us that we should do the sum in the brackets before anything else. 
(8)(5)
8 X 5 = 40

The seventh term is 40. The answer is D)