Solve the problem.Jill is 14 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 2 kilometers per hour. They meet in 4 hours. How fast is Joe walking?
A. 1.5 kilometers per hour
B. 2 kilometers per hour
C. 3.5 kilometers per hour
D. 2.5 kilometers per hour
Answer: A
Mathematics
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A. 
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C. ?
D. 
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A. (-8, ?) B. [0, ?) C. (-?, ?) D. [-8, ?)
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A. x < -6, (-?, -6)
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C. x ? 11, (-?, 11]
D. x ? 11, [11, ?)
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A. {(4, 4, 3)} B. {(4, 3, 4)} C. {(3, 4, 4)} D. ?
Mathematics