Perform the conversion. Round to the nearest tenth when necessary.81.9 km/hr to mi/hr
A. 120.1 mi/hr
B. 55.8 mi/hr
C. 131.9 mi/hr
D. 50.8 mi/hr
Answer: D
Mathematics
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Mathematics
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A. 
B. 
C. 
D. No inverse
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Factor by grouping.ay + y - a - 1
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