What is 2x - 2x?

I dont get it!

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. ?

I’m still confused on how to work the percentages

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)