X-7y=10 and 2x+14y=21
is it parallel or perpendicular

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.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?

Find the measurement of angle b in the following triangle