What is the measure of BFD?

If you could answer these your a life saver

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)

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.