The hypotenuse of a right triangle is twice the length of one of its legs. Th length of the other leg is three feet. Find the lengths of three sides of the triangle enter your answer in radical form if applicable

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.