Which expression completes the identity sin u sin v?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

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. ?

Which number line correctly shows 0.8 + 0.3?