Richard has two circular sprinklers to water his rectangular backyard, as shown.

(Richards Backyard is in the Picture)

The backyard has an area of 512 square feet.

In the first response box, enter an expression using r that represents the
exact area, in square feet, of Richard's backyard that is not watered.

In the second response box, enter the area, in square feet, of Richard's
backyard that is not watered. Round your answer to the nearest hundredth.

ok

step-by-step explanation:

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

i believe the correct answer is b.

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.