7x =6x-9 I’m just confused on how it works still

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)