In a chess tournament, each player has to play one game with every other player. 2n players, where n is a positive integer, took part in the tournament. so far, player 1 has played 2n - 1 games, player 2 has played 2n - 2 games, player has played 2n - 3 games, and so on until player 2n - 1 has played 1 game. how many games has player 2n played?

In which form is the following function written? y = - 2(x – 3)(x + 5)

Someone answer this asap for gabriella uses the current exchange rate to write the function, h(x), where x is the number of u. s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a. gabriella averages 7.5 u. s. dollars for every 100 euros. b. gabriella averages 100 u. s. dollars for every 25 euros. c. gabriella can exchange 75 u. s. dollars for 100 euros. d. gabriella can exchange 100 u. s. dollars for 75 euros.

Find the area of the region between a regular hexagon with sides of 6" and its inscribed circle.