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Answer:
[tex]\sqrt{74}[/tex], or approximately 8.6
Step-by-step explanation:
By creating a right triangle as shown, we see that the given line is the hypotenuse of a right triangle with legs of lengths 5 and 7. By the Pythagorean Theorem, the length of the line is [tex]\sqrt{5^2+7^2}=\sqrt{74}[/tex].