On a bicycle, kathryn rides for 7 hours and is 23 miles from her house. after riding for 11 hours, she is 35 miles away. what is kathryn's average rate during her trip?

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.