1. y₁ = 70x
2. y₂ = 55x
Solve y₁ - y₂ for x = 11.
There is a pattern. Each number is added by 5. So take 22 and add 5 to get 27. Just repeat until you find your answer, which would be 42.
Answer is d, its simple....
Answer:
21.4476105895
Step-by-step explanation:
Using a calculator 
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