Please help. I dont understand how to do this.

Identify the graph of y = ln x + 1.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

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