What is the distance between the two points (-square rooted 7,-1) and (0,2)? Type in the value that belongs under the square root. Distance

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.