At the same rate, it will take 638.3 seconds to run 1 mile.
hope it helps you .
The first thing we must do for this case is to find the relationship between the variables.
We have then:

From here, we clear the value of "Y":


On the other hand we have:

From here, we clear the value of "x":

Then, replacing values we have:

On the other hand:

Finally, the perimeter is given by:

Substituting values we have:

Answer:
the perimeter of ABCD is:
44 units
4x+3y=8
x-2y=13
4x+3y=8
4x-4y=13
(4x-4x) - (3y+4y)= 5
7y=5
y=5/7
Plug this back to one of the original equations!
Good luck!