18=a over 2 how do you solve that as a one step

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

In what organelle does photosynthesis take place?

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30