Can yall help me this one?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

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.

Which linear function represents the line given by the point-slope equation y + 1 = –3(x – 5)?