HELP HOMEWORKKK 15 Points

x=12

Step-by-step explanation:

First, you know a triangle is equal to 180. Since you know the sum of the other two angles equal the outside angle, you can make them equal to each other, like 112=6x+3x+4. Combine like terms to 112=9x+4. Subtract 4 on both sides and divide by 9 on both sides to leave x by itself. This will leave you with x=12

answer: h

step-by-step explanation:

sounds & other waves originate from any vibrating object