Arectangular plot is enclosed by 200 m of fencing and has an area of a square metres. show that :

a) a= 100x-x^2 where x m is the length of one of its sides
b) the area is maximised if the rectangle is a square

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp