Explanation:
let d represent the number of days
let m represent the number of miles
The charges per day = $42.5
Charges per mile = 10 cents = $0.10
if number of miles = 225 miles
at most $150 means the maximum is $150
It can be represented by ≤ 150
The inequality becomes:
42.5 × d + 10 × m ≤ 150
42
