1. Every person at a party of twenty-eight people said hello to each of the other people at the party exactly once. How many "hello's" were said at the party?

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?