book Maths Puzzle Numerical Ability

find f(x) -g(x) when f(x) is x-1 and g(x) is 2x squared.

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book Other Question

Giovanni drove 200 miles in 3 hours and 45 minutes. at what spped did he travel? A solution of 60 ml is 50% acid. How many milliliters of water must be added to dilute it to a 30% acid solution?