Me find i'm not good with triangle at all so me as soon as you can. i have 9 weeks testing tomorrow and idk how to do them

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

Which of the following expressions is equal to 2x^2+8

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9