Three people are chosen from a 20-member committee for president, vice president, and secretary. In how many different ways can this be done

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

You and a friend went to the movies.you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

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?