The question is in the pic

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?