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x + 2y ≤ 48
x + y ≤ 30
2x + y ≤ 50
x ≥ 0, y ≥ 0

answer:   14

step-by-step explanation:          

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answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

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.  

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )