Answer:

Step-by-step explanation:
"4 times the sum of 2 and y".
<h3>Hope it is helpful...</h3>
i think it’s is a for the first one
5+23= 28 .........................
The mean of the answer is 20.5 because you add all of the number together and divide by 6 because there's 6 numbers.
I'm sorry, but I don't know how to do the standard deviation...
Hope this helped!