Plzz this is due today and i cant figure it out

Which expression is equivalent to the expression shown?

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn.if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.

Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense