Answer: I couldn't help you,but here's the answer. I'm not the bot the bot doens't have a cute anime chacter as their profile pic.
https://www.chegg.com/homework-help/questions-and-answers/ben-paid-45-old-guitar-cleaned-guitar-resold-marking-price-15--used-36-money-got-guitar-bu-q66963289
<span>This is the term used to describe economic systems in which the basic economic questions are answered based on a socially, pre-established way.</span>
The answer is (7,6)
This is because a midpoint is in the exact middle, meaning that both sides are an equal distance away. You can find this by fining the difference between the two corresponding coordinates then adding that difference to the midpoint and that will give you your other endpoint.
Hope this helped !!