Simplify X +2 over X^2 Plus 2X subtract three over X +2 over X^2-x

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

Rewrite so the subject can be y in the formula d=m-y/y+n

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?