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Answer b
Step-by-step explanation:
b
Answer:
C. The number of tiles needed to cover Region Z is the same as the number of tiles needed to cover both Region X and Region Y.
So, you put the values on the other sides of the vertical angles, so you get a set of interior angles (can't remeber word at the moment)
Make the angles equal to 180.
So equation looks like 3x+11+5x+9=180.
Now combine like terms, get 8x+20=180.
Subtract 20 from both sides and get 8x=160.
Divde both sides by 8 and get your answer of x= 20
Hope this helps