This is so hard Plz help help 2+2

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14