If XY=14 and XZ=21, what is YZ?

Explain how you cone up with it

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

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?