a train traveled the first d miles of its journey it an average speed of 40 miles per hour , the next d miles of its journey at an average speed of y miles per hour , and the final d miles of its journey at an average speed of 160 miles per hour . if the train ’ s average speed over the total distance was 96 miles per hour , what is the value of y ?
"average speed = total distance traveled / total time taken 3 d / d / 40 + d / y + d / 160 = 96 solving for d and y , 15 y = 11 y + 480 4 y = 400 y = 100 answer c"
divide(add(multiply(multiply(const_4, const_2), const_10), multiply(const_100, const_4)), subtract(divide(multiply(add(multiply(multiply(const_4, const_2), const_10), multiply(const_100, const_4)), const_3), 96), add(multiply(const_4, const_2), const_3)))