Answer:
Your answer for the first question is C
Step-by-step explanation:
This is true because you do the mean with the added numbers and without and you do the median with the added numbers and without
8(n + 9) <== ur expression
Check the picture below.
you really have two rectangles, a 6x10 and a 6x5, and surely you know what those areas are, so sum them up, and that's the area of the polygon.