Un comerciante adquirió frijoles y arroz por 200 quintales. Cuando vendió todo obtuvo un ingreso de $16,250 ya que cada quintal de frijoles lo vendó a $85, mientras que cada quintal de arroz a $70. ¿Cuántos quintales de cada producto comerció?

Which of the following expressions is equal to 2x^2+8

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x