Answer:
10
Step-by-step explanation:
12x + 20+40 = 180
12x = 120
X = 10
A. Equilateral: All sides are the same length
b. Scalene: All sides are different lengths
c. <span>Equilateral: </span>All sides are the same length
d. Isosceles: Two sides are the same length
e. Scalene: All sides are different lengths
f. Isosceles: <span>Two sides are the same length
Hope this helps!</span>
Answer:
option D
Step-by-step explanation:


(fog)(x) = f(g(x))
Plug in g(x) in f(x)
We plug in 1/x+3 in the place of x in f(x)

To simplify it we take LCD
LCD is (x+3)(x+3)


All the denominators are same so we combine the numerators


Option D is correct