56. 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 ?

Answer and Explanation

Your Answer is

Correct Answer is K

Explanation

The distance traveled by the plane is (speed × time), so the distance is 8x+7(325)=15(350), so choose K