Which shape does the intersection of the horizontal plane with a prism look like

For what values of x is x2 + 2x = 24 true?

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. ?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?