Respuesta :

texaschic101
6/20 = x/30.....6 gal to 20 plants = x gallons to 30 plants
cross multiply
(20)(x) = (30)(6)
20x = 180
x = 180/20
x = 9 .....it would take 9 gallons for 30 plants
The answer is 11.  welcome ;)

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good job