Can some one answer? Will mark as brainliest!!

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?

I’m really confused and need to learn this

Renee hiked for 6 3/4 miles. after resting, renee hiked back along the same route for 5 1/4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.