How do you find an angle of a hexagon

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false