Jan walks 2 miles at a constant rate of 3 miles per hour and then runs 1 mile at a constant rate of 8 miles per hour. What is Jan's average speed for the entire trip?
please answer quick

What is the value of x? enter your answer in the box. x = a right triangle with vertices labeled as a, b, and c. side c b is the base, and the top vertex is a. side a b contains a midpoint d. a line segment drawn from c to d bisects angle a c b into two parts labeled as a c d and b c d. angles a c d and b c d are marked with single arc. side a c is labeled as 3. base c b is labeled as 4. segment a d is labeled as 2.25. segment b d is labeled x.