What is the perimeter of a rectangle with a length of 9-2y and width of 7

Which number is irrational? a) 16 b) 18 c) 25 d) 36

Statement: if two distinct planes intersect, then their intersection is a line. which geometry term does the statement represent? defined term postulate theorem undefined term

The parabola opens: y=√x-4 (principal square root) up down right left