Add them all up and if they add up to 180 then your side lengths are good
Answer:
<h2>x = -1</h2>
Step-by-step explanation:

You have

So, we have to compute g(7) and feed it as input to f(x). We have

Answer:
D) 68°
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the opposite interior angles
z = 39+29
z =68