membership to a music club costs $75.members pay $10 per music lesson and nonmembers pay $15 per music lesson. how many music lessons would you have to take for them the cost to be the same for members and nonmembers

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

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Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.