Which line is parallel to a line whose slope is 2/5

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g