Please help will give brainliest

Aline parallel to a triangle's side splits ab into lengths of x - 5 and x + 2. the other side, ac, is split into lengths of x and x + 12. what is the length of ac? a) 12 b) 24 c) 36 d)

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Im literally having a mental breakdown