exam Maths Puzzle Numerical Ability

Where on the graph of 3x-y=12 are the x- and y-coordinate opposites of each other?

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exam Other Question

Use logs on both sides of the equation

9^28 - 9^27 / 8 = 3^x to find the unknown

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Stanbon for Math President! A=PI*r2 if A=113.04sq ft and PI*=3.14 what is r