Which expression gives the exact value of t?

6.3x+14 and 1.5x-6 answer in simplified form

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.

Answer pls man im trying to get out of summer school