Are the triangles congruent? and why?
SAS
SSS
AAS
ASA
HL
NOT CONGRUENT

They are congruent because of ASA.

Step-by-step explanation:

Since these points are at the same rate, we can safely assume that it is congruent based on these given statements below.  It is also ASA because angle B and angle C are mentioned in the given statements and there is a side explanation which is BC and EF which makes them angle-side-angle.

47 - 90 = 43

43 - 180 = x

x = 137

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