Answer:
"2a − 6".
Step-by-step explanation:
The correct expression is "2a − 6".
This is a way to verify:
Let's say Adrianna sold 36 magazines. Now, substitute in that for a in the expression and calculate:
[tex]2a-6=\\ \\2(36)-6=\\ \\72-6=\\ \\66[/tex]
Now, is 66 six less than the double of 36? The answer is yes, therefore, the expression is correct.