exam Maths Puzzle Numerical Ability

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49x^2-4

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Marie rode her bicycle from her home to the bicycle shop in town and then walked back home. If she averaged 6 miles per hour riding and 3 miles per hour walking, how far is it from her home to the bicylce shop if her total travel was 1 hour? The supplemet of an angle measures 10 times more than the measure of its complement. What is the measure of the angle?