Answer:
A
Step-by-step explanation:
It's A
So, how much acid is there in 6 gallons? well is 20% acid or (20/100), so the amount of acid in it just (20/100) * 6 or 1.2, the rest is say water.
now, if we want a 90% solution, and say we add "y" gallons, how much acid is in it? well (90/100) * y, or 0.9y.
now let's add "x" gallons of pure acid, now, pure acid is just pure acid, so is 100% acid, how much acid is there in it? (100/100) * x, or 1x or just x.
we know whatever "x" and "y" amounts are, they -> x + 6 = y
and we also know that x + 1.2 = 0.9y
The answer is 10.
4 a + 5 b when a = 4 and b = - 1.2
Answer:
3 over 2
Step-by-step explanation:
select 2 points on the line and see how far apart they are
Answer:2 coats
Step-by-step explanation:they can only use two coats with out running out
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