It looks like you already have a common denominator (y^2-9). So, you can just add the two numerators and put that over the common denominator. Hope this helps!
5 tons are 10k pounds The movie was 1hr and 35 minutes 7:05 PM Amar got home. He got home at 7:05 PM because the movie ended at 6:20 and it took him 45 minutes, 20+45 would be 65.
Sorry for not answering the other ones,I hope for what i answered helps.