Question 549719
Noe  speed = x mph
lily speed = x+10 mph

they are moving away from each other
add up speeds

x+x+10
=2x+10

time = 4 hours
distance = 480 miles

d=rt
480 = 4(2x+10)
/4
120=2x+10
120-10=2x
110=2x
/2
x=55

55 & 65 are the speeds of Noe & lily repectively