Which of the following is a measurement of length? A; The height of a building. B; How many blocks of concrete cover a sidewalk. C; The amount of writing space on a page. D; The amount of water in a pool

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.