Answer :

thebecks

Answer:

x = 13

Step-by-step explanation:

using the Pythagorean theorem

x² = 85² - 84²

x² = 7225 - 7056 = 169

x = 13

aminerassam

Answer:

x = √(85²-84²)

x = √(7225-7056)

x = √169

x = 13

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