Question

100 points Graham sold 6 magazines less than double what Adrianne sold, a. Which of the following expressions represents Graham's sales?

6a − 2
2(a − 6)
a2 − 6
2a − 6

Answer 1

Answer: 2a - 6

Explanation:

Took the test

Answer 2

"2a − 6".

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:

`2a-6=\\ \\2(36)-6=\\ \\72-6=\\ \\66`

Now, is 66 six less than the double of 36? The answer is yes, therefore, the expression is correct.