exam Maths Puzzle Numerical Ability

i need graph examples for #2 #5 on page 544..

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What are the coordinates of the focal point y=3(2)(^2x+4)-5 ? This is from a worksheet: In a chemistry class, 6 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution is needed?