How many justices must agree to an opinion for the Supreme Court to issue a decision?

five of the nine justices

Explanation:

The Supreme Court of the U.S.A is the only court that the Constitution has expressly established, making it the most powerful court in the country. At least five of the nine justices have to consent to a final decision. The judges of the Court debate the cases together and often tend to persuade each other to support their way of thinking. One or more of those judges is expected to write the "majority opinion," while those who disagree may write a "minority opinion." Both opinions are reported, but the final decision is the majority opinion.

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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"globalization has greatly impacted the united states and american citizens. first and foremost, globalization has spread american influence throughout the world. globalization has opened up more markets for the united states, which in effect american companies sell their products worldwide. there has been a rise of multinational corporations and their influence has greatly increased."