An airplane flew for 8 hours at an airspeed of x miles per hour (mph), and for 7 more hours
at 325 mph. If the average airspeed for the entire flight was 350 mph, which of the following
equations could be used to find x ?
A. x + 325 = 2(350)
B. x + 7(325) = 15(350)
C. 8 x – 7(325) = 350
D. 8 x + 7(325) = 2(350)
E 8 x + 7(325) = 15(350)

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e is the asnwer

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