How do you solve this?

If 20% of a number is 35, what is 50% of that number?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

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.