24x-1+20x+5=180
44x+4=180
44x=176
x=4
Therefore, 20x+ 5 is equivalent to 20(4)+5
20(4)+5
80+5
85
Hope this helps :)
a. We can parameterize
by


with
. Then

b. We can parameterize the opposite direction by instead setting


with
. Then

which gives the same value as in part (a).
The dog has about 20 ft of running area