If you wanted to mix pure methane with water and end up with 70 gallons of 20% methane, how many gallons of each should you use? You should use gallons of water and gallons of methane > Next Question

You want 40% of 140 gallons to be methane,

so 60% of 140 gallons is water

methane:  0.4(140) = 56 gallons

water:  0.6(140)  = 84 gallons

Step-by-step explanation:

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)