During a trip, Francine traveled x percent of the total distance at an average speed of 100 miles per hour and the rest of the distance at an average speed of 90 miles per hour. In terms of x, what was Francineâ€™s average speed for the entire trip?	Options:
A) (180-x)/2 B) (x+60)/4 C) (300-x)/5 D) 600/(115-x) E) 9,000/(100+8x)
E....   X% traveeled at 10 mph   100-X% traveeled at 90 mph   total timt taken = x/10 +(100-x)/90 = (100+8x)/90   Total distance = x+(100-x) = 100   Av speed = Tot Dis/Time Taken which is 9,000/(100+8x)
<result>E</result>
During a trip, Francine traveled x percent of the total distance at an average speed of 100 miles per hour and the rest of the distance at an average speed of 90 miles per hour. In terms of x, what was Francineâ€™s average speed for the entire trip?