x+(-8)= -12
x-8= -12
x= -12+8
x=-4
-3 + x = 10
x=10+3
x=13
-2+x= -5
x=-5+2
x=-3
Answer:
0.8 hr = 0.8*3600 seconds = 2880 seconds
d = 30*2880 meters = 8640 meters
d = 8.64 km
Step-by-step explanation:
hope this helps
