Serena paid $194.99 for a game system and then bought two equally-priced games. If she spent a total of $284.97, what is the equation that best fits this problem?

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

her total is 2

  -3+5=2