Sandra wrote the sequence shown.

3, 6, 11, 18, 27, …
What explicit expression can be used to find the nth term of this sequence?

A.
3n + 2(n – 1)

B.
n^2 + 2

C.
3n + 12

D.
3n^2 – 6

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.