If all three are correct will get five stars and the whatever you call it mark as something but all have to be right

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.