Describe in your own words what it means to say that integers are Not closed under division? ( please help me with this question)

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.

Put the equation in slope intercept form by solving for y

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?