Answer:
6.4 miles
Step-by-step explanation:
Here we should notice that the distance that Brian runs and the spent time are two proportional variables.
Then
[tex]\frac{time}{distance } = k \ \ ;\text{where k is a constant}[/tex]
[tex]k = \frac{30}{4} = 7.5[/tex]
let ‘d’ be the number of miles thatBrian would run in 48 minutes
We can write this equation:
[tex]\frac{48}{d} = 7.5[/tex]
Then
[tex]d = \frac{48}{7.5 } = 6.4[/tex]
