Easily, take the square root of the number in the right side to find the radius

is the answer
the answer is option A........
consider expanding into the brackets, helpful?
Answer:
y = 13x
Step-by-step explanation:
If "y" represents how much he earns total
and "x" represents the number of games sold
then the equation is 
which can be simplified to 
Answer:
x = 11
Step-by-step explanation:
I’m not 100% sure but I believe it’s A