Answer:
8km 5mi
Step-by-step explanation:
20x400=8000meters a km = to 1000meters
8000/1000=8km
A mile is a kilometer/ 1.6 8/1.6=5 miles
the sum is zero
A is equal to 8, B is equal to -8. 8+(-8)=0
12=9
Obviously
.................
y+z=10
x+z=8
x+y=12
(y+z)-(x+z)=10-8
y-x=2
y+x=12
solve simultaneously
x=5, y=7
then substitute to get z=3
hence xyz=573
36
