Answer:
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Answer:
13
Step-by-step explanation:
-2(-2) - (-8) + 1
4 + 8 + 1 = 13
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Formula
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a² + b² = c²
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Find Diagonal
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9² + 7² = c²
c² = 81 + 49
c² = 130
c = 11 in (Nearest whole number)
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Answer: The diagonal measure 11 inches
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It is x=8 because 13+7=20 and 28-20 would be 8 and that's the missing number.
