8(a+4)=___a+___ PLZ HELP IM STUCK ON THIS

What are the relative frequencies to the nearest hundredth of the columns of the two-way table? a b group 1 102 34 group 2 18 14

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

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