What is 15 5/7 - 6 4/5

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 many solutions does the nonlinear system of equations graphed below have?

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse