Respuesta :

wegnerkolmp2741o

Answer:

21 gallons

Step-by-step explanation:

We can write a ratio

15 gallons       x gallons

----------------- = ------------

5 fields                 7 fields

Using cross products

15*7 = 5x

Divide each side by 5

15/5 *7 = 5x/5

3*7 =x

21

He will need 21 gallons

antonyjoshua18

Answer:

21 gallons

Step-by-step explanation:

15/5=3

3*7=21