Answer:
The answer is the option 
Step-by-step explanation:
see the attached figure with letters to better understand the problem
we know that

-----> by vertical angles
-----> given problem
-----> given problem
substitute

Answer:
Step-by-step explanation:
Each child received two pieces.
So total pieces received by 4 children = 4*2 = 8
Total pieces = 10 + 8 = 18
Answer:
C(m) = 0.10x + 41
Step-by-step explanation:
C(m) = 0.10m + 41
The answers are 6i/13 and -6i/13. The work it attached below