exam Maths Puzzle Numerical Ability

"Arctic Antifreeze" is 18%alchol and "frost No-More" is 10%alchol. How many liters of each should be mixed to get 20L of a mixture that is 15% alchol?

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find the distance between points (-6,0) and (-3,1) I have the following problem that I could use some help on. Find the indicated output for this function. If f(x)=2x^3-3x+1 find f(3). Thank you.