Aya was at the library for 48 minutes until it close at 6.30p. m. what time did aya arrive at the library

The distributive property allows you to say that 3(x − 1) = 3x −

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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?