Answer:
The value is 
Step-by-step explanation:
From the question we are told that
The mean is 
Given that 20% of the values are greater than 70, the z-score to the right of the curve corresponding to 20% (0.2) of the values is
Generally this z-score is mathematically represented as

Here x = 70
So

=> 
<span>22 5/6. No 22 is less than 22 5/6.</span>
First: (X+3)(x+3) foil it.
Then distribute the 3x among the values and combine like terms