Determine whether the side lengths shown are possible (trigonometry) pls answer im confused

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Somone me i want to know what 18 hours out of 24 hours in a fraction

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.