Answer:
A.

Step-by-step explanation:
Since the denominators are the same we just have to combine the top.

Combine alike terms.

put that over our denominator.

Answer:
x + 9
Step-by-step explanation:
Since the total measure of all the angles of a triangle is always 180, solve for x with the equation: 3x+1+2x-3+9x=180. x=13. Now plug in x and look for the smallest one, which will be B. 23 degrees.