Answer:
The answers of the proof are the following:
2. Multiplication Property of Equality
3. x-2 = 8
4. Addition Property of Equality
5. x=10, Simplifying
Answer:
45.5
Step-by-step explanation:
Use pyth theorem to find the whole bottom side. Then sub 16 by 13. # is the small segmented area. The small segmented tri is 10.5 area. The big tri is 56. Sub 10.5 from 56 to get 45.5.
Note that

in the given closed interval, so the area is exactly given by the definite integral

(no absolute values needed!)
Integrating gives