The difference of two and a number is at least negative one

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. ?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

The square root of 9x plus 7 plus the square rot of 2x equall to 7