Can someone help with dis plz :/

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.

Find solution of the linear equation y = 2/3x + 1/3

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.