Given the speed of each runner, who’s the fastest? Stephanie runs 12 feet per second.
Liz runs 306 feet in 38 seconds.
Will runs 1 mile in 491 seconds.
Brooke runs 851 feet in 1 minute.

Brooke is the fastest

Step-by-step explanation:

12 ft / sec

306ft / 38sec = 8.05 ft / sec

1 mi / 491 sec

1 mile = 5280 ft

1 mi / 491 sec = 5280ft / 491sec = 10.75 ft / sec

851 ft / 1 min

1 minute = 60 seconds

851 ft / 1 min = 851 ft / 60 sec = 14.18 ft / sec

then:

14.18 > 12 > 10.75 > 8.05

then:

Brooke is the fastest

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

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'.