Factor the expression 27+12

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.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5