Asubmarine starts at an elevation of -35 meters compared to sea level. it then makes 3 equal descents of 145 meters each. is the final depth of the submarine greater than 500 meters? explain how you solved this problem

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.