I need help with this question please

And employees salary increase by $4500 which represents a 15% raise what is the employees new salary

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

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.