Develop the Cartesian equation of a plane that is perpendicular to the plane with x, y and z intercepts 4, -3, 9 and contains the line of intersection of the planes ∏1 : 3x + 6y − z + 4 = 0 and ∏2 : x − 2y + 5z − 2 = 0

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30