What are the steps to simplify (5--3i)?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

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.

Divide. write in the simplest form. 4 1/6 divided by 10