exam Maths Puzzle Numerical Ability

69.72=68.9257x + 70.9249(1-x)

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exam Other Question

Is the folowing an example of a function: Explain why or why not
(2, 4) (3, 9) (-2, 4) (-3, 9) Hi,
I have been asking the question wrong, because I was reading it incorrectly.

My study exam reads: Solve the following systems of equation by any method.

a) 3x-2y=12