It takes 63 minutes for 4 people to paint 9 walls.
how many minutes does it take 7 people to paint 4 walls?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

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?

Plzzz answer both questions and i will give you 100 points