Answer: 
Step-by-step explanation:
By the exterior angle theorem, 
The answer is D. Because (18 x 10^6) + (5 x 10^4) = 18050000. And the answer to 1.805 x 10^7 also equals 18050000, if you do the math.
A. (4+16)/2 = (4+10+16)/3 =10
Answer:
19
Step-by-step explanation:
y=2×8+3
=16+3=19
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