Arectangular lot that measures 150 ft by 200 ft is completely fenced. what is the approximate length, in feet, of the fence?
can someone explain me how to make it step by step?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.