Assume that 0< x < pi/2 and 0< y < pi/2. Find the exact value of tan(x+y) if csc x= 5/3 and cos y= 5/13

Can someone me out here and the tell me the greatest common factor

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?