Can someone please help me with this.

The answer it C. 135

Step-by-step explanation:

It is a supplementary angle so therefore it’s supposed to equal 180 degrees.

So, 180-45= 135

the square root of what number? if you add that, then someone will probably answer the question.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!