
Collecting like terms,

Since the signs change when its position changes.

Step-by-step explanation:
number of the total cookies ÷ the nber her brother ate
6÷2=3
Let the speed off the walk way be x and speed of the walkway be y
x+y=6....i
x-y=2....ii
adding the above equation we get:
2x=8
thus
x=4 ft/s
and
y=6-4=2 ft/s
thus the speed off the walk way is 4 ft/s
the speed of the moving walkway is 2 ft/s
Answer:
.1273 mi = 627.2 feet
c = 2
r
.4 = 2
r
r = 
r = 
d = 
d = .1273 mi = 627.2 feet
Step-by-step explanation: