Mathematics, 20.08.2019 05:00, jblac

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. 8x – 7(325) = 350
d. 8x + 7(325) = 2(350)
e. 8x + 7(325) = 15(350)

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An airplane flew for 8 hours at an airspeed of x miles per hour (mph), and for 7 more hours at 325 m...