math ( sequence )
posted by Thomas on .
A sequence is generated in which each term is 5 less than the previous term. If the twentieth term is 32, what is the fifteenth term ?
a. 57
b. 12
c. 7
d. 2
e. 7
please answer and explain

There are 5 terms between T15 and T20, so we need to add 5 five times to back up from T20 to T15.
32 + 5(5) = 7