Ineed ! !
evaluate the difference quotient for the given function:
f(x)=(x+3)/(x+1) , (f(x)-f(1)) / x-1

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.