1/2(8x+26)=23+4x could someone me out

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4