Book Maths Puzzle Ratio and Proportion

in a regular polygon, the ratio of an exterior angle to the measure of an interior andgle is 2:3. How many sides does the polygon have?

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Book Other Question

could you help me solve and graph this equation -4x(squared)-8x= -12 the measure of a supplement of an angle os 8 more than 3 times the measure of a complement. find the measure of the angle.