Which country begin the slavery system in the Americas?

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?

Commercial agriculture consists of raising food for trade and profit, while subsistence agriculture focuses on -- a. providing the basic needs of the farmer's family b. providing the basic needs of the neighboring communities c. creating more arable land for future use d. obtaining subsidies from governments and corporations

Susan, a los angeles resident, appears on a new nbc reality show, my big fat obnoxious accountant. susan is the first to be "kicked off the island" and leaves the show in shame. on her way out, she throws a temper tantrum and destroys some of the furniture on the set. nbc and the production company that made the show are incorporated and headquartered in new york, where the show is filmed. nbc and the producers have offices and conduct business in los angeles and san francisco. humiliated by the loss, susan plans to sue nbc and the producers of the show for breach of contract, fraud and intentional infliction of emotional distress, seeking $200,000 in damages. susan is considering filing her lawsuit in california state court, new york state court or the federal courts. as to each of the state courts, indicate whether personal jurisdiction exists and why.