Final answer:
The Supreme Court decision affirming 'separate but equal' was Plessy v. Ferguson, but it was overturned by Brown v. Board of Education in 1954.
Explanation:
Plessy v. Ferguson was the Supreme Court decision that affirmed the idea of 'separate but equal.' This 1896 ruling allowed racial segregation under the equal protection clause of the Fourteenth Amendment. However, the 1954 Brown v. Board of Education decision overturned the separate-but-equal doctrine, marking the end of legal segregation in the United States.
Learn more about Supreme Court decisions on racial segregation here:
https://brainly.com/question/42769295
