Solve.
-Jill is 14 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 2.5 kilometers per hour. They meet in 4 hours. How fast is Joe walking?
A) 2.5 kilometers per hour
B) 1 kilometers per hour
C) 2 kilometers per hour
D) 3 kilometers per hour
Correct Answer:
Verified
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-x + 5y + 2z = -27
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-3x + 5y + z = -22
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-x + y + z = -6
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Q100: Solve.
-x + y + z = 7
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