exam Maths Puzzle Numerical Ability

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Solve the system by substitution.
3x - y = -7
x + y = -9

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exam Other Question

Definition: If m is any real number, then m to the first power = _________ Draw L1 through (-4,0) and (0,6). What is the slope of any line parallel to L1? Draw L2 through the origin and parallel to L1.