Csc theta=1/sec theta please select the best answer from the choices provided

And explain how you got it so i can understand future problems : 3

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

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?