exam Maths Puzzle Numerical Ability

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x+y=7
x-y=9

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exam Other Question

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Assume the variablex>-9 and use the factx^2+18x+81=(x+9)^2to find x^2+18x+81(there is a square root symbol over the last part Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, an