Solve the problem.If two planes leave an airport at the same time with one flying west at 740 miles per hour and the other flying east at 57 0 miles per hour, how long will it take them to be 3930 miles apart?
A. 2.5 hours
B. 2 hours
C. 3 hours
D. 4 hours
Answer: C
Mathematics
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,
,
, . . .
A. 4
B. 10
C.
D.
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, find BA.
A.
B.
C.
D.
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. Find -3A + 2B.
A.
B.
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