removing 15 gallons reduces the tank from 20 to 5.
Answer from: Quest
(f - g)(x) = 5x^3 - 3
step-by-step explanation:
rearrange these functions vertically, with like terms in separate columns:
f(x) = 5x^3 - 2
g(x) = +1
now subtract, column by column:
(f - g)(x) = 5x^3 - 3
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