Answer:
9 miles
Step-by-step explanation:
Given data
A ride costs $1.50
$0.25 for each additional mile
Let the number of miles be x
and the cost of x miles be y
Hence the expression for the total cost is
y= 1.5+ 0.25x
now when y= 3.75
3.75= 1.5+0.25x
3.75-1.5= 0.25x
2.25= 0.25x
x= 2.25/0.25
x= 9 miles
Hence he must not go beyond 9 miles