Help please !! Circle problem

Which of the following are accepted without proof in a logical system? check all that apply.

The only way to identify an intercept is as an ordered pair. true false

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