Brady rented a car for two days at $25 A day plus 0.15 per mile. If his total bill came to $102.50 how many miles did Brady drive?
Let the number of miles Brady drive be x.
The cost of the car rental for two days is $25 x 2 = $<<25*2=50>>50.
The cost of the mileage is 0.15x.
The total bill is the sum of the cost of the car rental and the cost of the mileage, which is 50 + 0.15x = 102.50.
Therefore, 0.15x = 102.50 - 50 = 52.50.
Hence, Brady drove x = 52.50 / 0.15 = <<52.50/0.15=350>>350 miles. Answer: \boxed{350}.