From the set {6, 9, 81}, use substitution to determine which value of x makes the inequality true. 3x < 27

What is the product of the radical expression. (7-2square root) (8+2 square root)

Place the following steps in order to complete the square and solve the quadratic equation,

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?