What is the greatest common factor of 60x4y7, 45x5y5 , and 75x3v

Which graph represents the following piecewise defined function?

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. ?

3x + 4y = 5 x- 3y = -7 solve by substitution