Write all the multiples of 6 between 50 and 100

How can you find the mean absolute deviation (mad) for this set of data?

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.

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !