What is the median of the data set 18, 16, 18?

What is the distance between point a and b

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Points j and k plotted on the coordinate grid are two vertices of rectangle jklm rectangle jklm has an area of 7 square units point j is located at 2,1 and point k is located at -5,1 each vertex of the rectangle is located at a point that has integer coordinates. what is the perimeter of rectangle jklm? (need answer asap)