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User Somatik
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2 Answers

1 vote
Use the pythagorean theorem:
a^2 + b^2 = c^2

1. x + 7.8² = √428.49 (20.7²)

2. x + 60.84 = √428.49
3. - 60.84 -60.84
4. x = √367.65
5. x = 19.174
User Anshu Chimala
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7.0k points
4 votes

Answer:

C. 19.2

Explanation:

User Mercutio
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7.5k points
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