Answer:
Not a solution
Step-by-step explanation:
In order for 
to be a solution, the result after substituting must be 0:
Therefore, is not a solution to 
The answer is option "3, 40".
<span>m∠cab = 2x
m∠acb = x + 30
m∠cbd = 5x − 50
Now,
</span>m∠cab + m∠acb = m∠cbd
2x+x+30 = 5x-50
2x+x-5x = -50-30
-2x = -80
x = 40
ES is half of EF since a chord is bisected by the radius. ES = 10
YOU CAN DO Y=MX+B AND YOU WILL FIND YOUR ANSWER
Just like you drew those dotted lines. You know how to find the areas of rectangles which is A=length x width
The answer would be 20cm^2+6cm^2+18cm^2=44 cm^2
