Simplify and select the answer with the appropriate restrictions for the variables. (x+3)(x+7)/3x+21

Which statement about perfect cubes is true

Is a positive integer raised to a negative power always positive

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.