Perform the operation (5x^2 – 9) + (-10x + 7)

True or false? many triangular shapes can be circumscribed about a given circle

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.

How to simply and write the answer n a whole number