Let x be the lowest positive number Then the other number = 5x.
So 5x - x = 72
4x = 72
x = 18
So the numbers are 18 and 90 answer
1 km = 0.621371 miles
5 km = 5 x 0.621371 = 3.106855 miles
round off as needed.
0.4 is 4/10 in decimal form.
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