Picture down below
Please answer I’m stuck on it

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

Graph the function =gx+2x3 and give its domain and range using interval notation.