a scientist needs 120 liters of a 20% acid solution for the experiment. the lab has available a 25% and a 10% solution. how many liters of the 25% and how many litres of the 10% solution should the scientist mix to make the 20% solution

step-by-step explanation:

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2

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step-by-step explanation:

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