1.in 1863, president abraham lincoln gave his famous gettysburg address. it starts, “four score and seven years ” four score and seven is equal to 87. how many years are in a score? what year was president lincoln referring to?

There are 20 years in a score, so "four score and seven years ago" refers to 87 years before (as 4 x 20 + 7 = 87), that is, 1776 (87 years before 1863, the year of the Gettysburg Address, as 1863 - 87 = 1776). Therefore, President Lincoln was referring to the year of the Declaration of the Independence of the United States of America.

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step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

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