Referring to the diagram at the right, ABC = 4x + 30, ABD = 5x + 10, and DBC = 3x - 20 Find x. Find ABC. Find ABD show your work!

ABD+DBC=ABC

Step-by-step explanation:

5X+10+3X-20=4X+30

X=10

To get abd substitute into 5x +10

5{10}+10

50+10

60

1. TRUE
2. false - compare to 3.
3. TRUE - compare to 4.
4. TRUE - the sum of exernal angles of any convex polygon is 360°
5. false - compare to 4.
6. false - compare to 7.
7. TRUE - the angles are supplementary
8. false - compare to 4.

The true statements are 1, 3, 4, 7.