Which construction is illustrated below? picture attached.

A perpendicular to a given line from a point on the line.

Step-by-step explanation:

The construction is a perpendicular bisector to a line from a point on the line.

And to show that its a perpendicular bisector; a circle is drawn such that the line becomes the diameter of the circle and the perpendicular bisector passes through the center of the circle.

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2

the answer is b