In mr. sneed's classroom, there are 120 tiles and 10 lights. what is the ratio of lights to tiles in mr. sneed's classroom?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

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. ?

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?