Respuesta :

wegnerkolmp2741o

Answer:

15.3 gallons

Step-by-step explanation:

We can write a ratio

420 miles      357 miles

--------------  = --------------

18 gallons    x gallon

Using cross products

420x = 357*18

420x =6426

Divide each side by 420

420x/420 = 6426/420

x =15.3