Answer:
4.5 miles
Step-by-step explanation:
Hello!
Let's take note the conversion factor of 1 mile=1760 yards.
We can use this relation to make a proportionality rule.
We don't KNOW the milage of James, but we know how many yards he ran.
[tex]\frac{1~mile}{1760~yards} = \frac{x~miles}{7920~yards}[/tex]
We can cross multiply to figure out x, the miles he ran.
(1)(7920)=1760(x)
7920=1760x
4.5=x
James ran 4.5 miles every week.
