Question

Luther and Martin are members of different video game libraries.

Answer 1

In this case you actually don't have to do much of any work. The 6x means Martin pays six dollars per game. That means the additional 60 is his membership fee. Luthers function would look like this: y= 9x+85 which 85 is the fee and he pays nine dollars per game. Subtract the fees and you get that Luther pays $15 more for the membership.

Answer 2

No the answer is $25. You take both fees and subtract them. Your answer will be $25. I just did this queation and I got it right.