pls help due in 5 minutes

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

Factor the expression using gcf 9b+45