Solve for each unknown variable, #67

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The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?